Support Reaction Forces Research Articles

Dynamic response analysis of submerged floating tunnel after anchor cables forces adjustment under impact load

Submerged Floating Tunnel (SFT) is a new type of cable-supported structural system for straight crossings. In this study, the initial state of the SFT was optimized based on the existing SFT cable-force adjustment method (relatively uniform cable forces, minimizing the support reaction forces at the abutment section). The responses of the SFT under static and seismic conditions before and after cable-force adjustment were compared, further verifying the optimization effect of the cable-force adjustment method on the structural performance of the SFT. In addition, a theoretical model (flexible support model) of the anchor cables was proposed to calculate the displacement after impact by sunken ships. A finite element model of the SFT was established using ABAQUS to prove the accuracy of the flexible boundary model. In addition, the flexible support stiffnesses of anchor cables at different positions were determined based on the finite element model. Finally, the SFT after the cable-force adjustment was analyzed to study the response patterns of the anchor cables at different positions under an impact load. The results demonstrate that a correlation between the distribution pattern of the flexible boundary stiffnesses of anchor cables and the regulation of the responses of the anchor cables to impact load.

Study on prestress distribution and structural performance of heptagonal six-five-strut alternated cable dome with inner hole

The cable dome structure is a highly efficient prestressed space structure with reasonable force, attractive shape, and large spanning capacity. It is increasingly widely used in stadiums, exhibition halls, terminals, and other large-scale public buildings and the roof structure of various transport hub projects. To solve the problem of weak overall structural stability of the traditional cable dome structure, a new type of prestressed space structure is proposed - heptagonal six-five-strut alternated cable dome with an inner hole. The composition of the structural system was given and a theoretical study of the distribution of structural prestress was carried out; based on the symmetry and periodicity conditions, the initial prestress distribution of the structure was accurately calculated using the node balance method, and the formulae for the geometric parameters of the structural cable-strut were derived; the numerical model was established by using the finite element software ANSYS 2022 R1, and the force characteristics of the structure under full-span uniform load, half span uniform live load, wind load, and temperature were studied. The effects of structural prestress, overall shape, and support stiffness, totaling three categories and six parameters, on the structural mechanical performance of the internal force of the member, node displacement, and support reaction force were analysed in detail and the sensitivity of the parameters is assessed quantitatively, accordingly, the values of the main design parameters such as thick-span ratio are given as suggestions. The analysis results show that the new structural system has a high load-carrying capacity and deformation resistance, and its proposal provides a new scheme and new ideas for the selection and design of the cable dome.

Scaling laws of low-velocity impact response for RC beams: Impact force and reaction force

Predicting the low-velocity impact response of the prototype based on the scaled test results is one of the significant topics in structural design and protection. Thus, reliable similarity laws are required to bridge the dynamic similarity between models and prototypes. In this study, numerical modeling was carried out by considering plastic damage and strain rate effects. Then, the impact responses of four series reinforced concrete beams satisfying traditional similarity laws were analyzed. The largest beam section size reached 600 mm × 1000 mm. The scaling effects on the impact force profiles (comprising three Types) and reaction force profiles of the beam were investigated. Several characteristic points were defined for the available simplified profiles of impact and reaction forces. It is shown that the scaling effects on each characteristic are not consistent. As the theoretical scale factor increases, the characteristics such as the peak impact force, the positive peak of the reaction force, and its plateau satisfy the traditional similarity law, whereas the characteristics such as the impact force duration and the negative peak of the reaction force do not. Therefore, modified dynamic scale factors for the characteristics of impact and reaction force profiles from models to prototypes were proposed. Based on the suggested scaling laws, the simplified profiles of impact and support reaction forces of the prototype can be predicted. It is expected that it will help researchers to conduct experimental studies and optimized designs on structural impact resistance.

Moment Redistribution in UHPC Continuous Beams Reinforced with High-Strength Steel Bars: Numerical Investigation and Prediction Model

Considering moment redistribution in the design of ultra-high-performance concrete (UHPC) statically indeterminate structures can fully exploit the load-bearing potential of members, simplify reinforcement details, and save construction costs. Due to the excellent properties of ultra-high-performance concrete (UHPC) that distinguish it from conventional concrete, new characteristics of the moment redistribution manifest in UHPC structures. In this study, a finite element (FE) analytical model was developed to simulate and analyze the bending behavior and moment redistribution of UHPC continuous beams reinforced with high-strength steel bars. The simulation and test results exhibited excellent agreement with the experimental research. Based on the FE model, a fine analysis for nine simulated two-span UHPC continuous beams was conducted with a detailed discussion of the failure modes, load-displacement curves, variations of support reaction forces, tensile strains of steel bars, and the whole process of moment redistribution. Subsequently, the variation rules of moment redistribution in UHPC continuous beams were explored by an extensive parametric study of 108 simulated beams. The studied parameters included a neutral axis depth factor, concrete strength, yielding strength of reinforcement, beam depth, span–depth ratio, reinforcement ratio between the mid-span and intermediate support section, as well as load forms. According to the numerical results, new formulas for estimating the two-stage moment redistribution in UHPC continuous beams with high-strength reinforcement were established. Finally, a comparison of moment redistribution between normal concrete continuous beams and UHPC continuous beams was performed. It can be observed that the elastic moment distribution in UHPC continuous beams was comparatively smaller, while the plastic moment distribution was relatively larger than those of normal concrete continuous beams. Overall, the degree of the total moment distribution in UHPC structures was greater than that of normal concrete structures due to the high ductility of UHPC. The research in this study may provide a technical reference for the practical engineering of UHPC.

Dynamic modeling and analysis of the rotor–stator coupling system of a coaxial contra-rotating gearbox

In this paper, a main gearbox using an encased differential gear train to achieve coaxial contra-rotating is considered, and a dynamic modeling method of the rotor–stator coupling system of the gearbox based on box model updating is introduced. The transverse torsional dynamic model of the gear transmission subsystem is established based on the lumped parameter method. The finite element model of the box is updated according to the modal test data, and the reduced dynamic parameters of the box are obtained. According to the displacement coordination condition, the dynamic model of the rotor–stator system of the gearbox is established. The vibration response of the transmission components with or without the coupling box is calculated by numerical integration, and the response of the box caused by the dynamic support reaction force is analyzed by the finite element method. The results show that the vibration peak and fluctuation range of the transmission parts with coupling box are smaller than those without coupling box. The box response at the support of the input bevel gear pair is large, while that at the support of the output shaft is small.

Comparative study on the capture performance of two wave energy converters integrated into the jacket-frame foundation

The global pursuit of clean energy resources to cope with escalating energy demands has underscored the pivotal roles of wind and wave power as two prominent renewable energy sources for the power industry. In order to promote the comprehensive harnessing of ocean energy, research efforts have increasingly focused on hybrid approaches, aiming to concurrently capture wind and wave energies. This paper proposes two types of wind-wave hybrid device, which combines wind turbine with a wave energy converter (WEC), based on jacket-frame foundation. The numerical models of the WECs were created using SOLIDWORKS, and the subsequent simulations were conducted using ANSYS Workbench. The comparative analysis revealed that the heave-type WEC had less added mass and radiation damping, coupled with larger response amplitude operator (RAO) and shorter natural period compared to the swinging counterpart. Meanwhile, the swing-type WEC exhibited higher motion speed and greater support reaction force and connecting force, thereby exerting more pronounced influence on the foundation. However, the average hourly power generation of the swinging WEC was significantly better in terms of power capture. In practice, the choice between these WEC configurations should consider aligning the power matrix with the probability distribution of prevailing sea state conditions.

Effect of load details of the successive explosions on the blast behaviors of reinforced concrete beams

SummaryThe objective of this study was to study the effect of load details of successive explosions on the blast behaviors of reinforced concrete (RC) beams. First, the effect of the successive loading of two identical explosions was discussed by considering the influences of standoff distance, charge mass on the failure states, and structural responses (displacement and support reaction force). And keeping the total TNT charge mass of 1 kg unchanged, the effect of loading numbers was investigated by loading two 0.5 kg TNT successively and a single 1 kg TNT on RC beams, respectively. Besides, the successive loading of two different explosions was also considered by investigating the effects of loading sequences and the first explosion induced pre‐damage on the ultimate accumulated damage of RC beams. At last, based on the reaction force and displacement responses, a nonlinear relationship between the dynamic residual load‐carrying capacity and the accumulated residual displacement was obtained to assess the damage states of the tested beams. The results show that the local failure range along the beam span direction (length of peeling‐off and length of spallation) caused by the first blast load did not apparently increase when the damaged beams were subjected to another blast load. With the increase in explosion numbers, depth of compressive crushing increases gradually. At the same stand‐off distance (from 0.25 to 0.45 m), due to the damage accumulation effect, successive loading of two 0.5 kg TNT can trigger more severe local failure but smaller accumulated residual deflection to beams than the single loading of a 1 kg TNT. Besides, when two different blast loads are loaded on tested beams, the loading sequence of the larger one first and then the smaller one (1 kg TNT/0.5 kg TNT at h = 0.45 m) can trigger larger damage to beams than the opposite loading sequence (0.5 kg TNT/1 kg TNT at h = 0.45 m). And for the beams subjected to a smaller blast load first and then a larger one, a stiffer behavior may be triggered by the second blast load on the beam after the first loading of the smaller blast load due to the residual strain in longitudinal reinforcement. Furthermore, based on the nonlinear relationship between residual load‐carrying capacity and residual displacement, the accumulated damage of RC beams was divided into mainly four phases.

Analytical method for overturning risk assessment of curved girder bridges with single-column piers under heavy-duty vehicles

Overload-induced overturning of curved girder bridges with single-column piers occurs frequently, resulting in serious casualties and public property losses. Hence, it is essential to study the overturning mechanism of such bridges for an accurate overturning risk assessment. In this study, the dead loads of the bridge were first obtained considering the additional torque induced by the difference between internal and external self-weight, and the heavy vehicles-induced live loads were achieved accurately with the introduction of the trailer turning model. The mechanical model of the curved girder bridges with single-column piers was established, and analytical formulae of support reaction and torque considering bearing stiffness were derived based on the force method principle. Second, the assessment methods of the bearing disengagement state with combined support reaction force and torsion angle and overturning limit state with rotation of combined rigid body and deformation body were proposed, respectively. On this basis, the overturning risk assessment method of curved girder bridges with single-column piers was established for the two critical states. Finally, the entire overturning process of an example bridge was analyzed based on a finite solid element model, and the validity of the overturning risk assessment method was determined with the comparison of the evaluation results under critical loads.

Experimental Research on the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates

A structure may be exposed to a range of unexpected loads throughout its full life cycle. Partially precast concrete (PC) beams refer to the process of manufacturing concrete beams in which one part of the component is pre−fabricated in a factory and the other part is completed at the construction site. Through the test, it is possible to better ensure the safety and dependability of the PC composite beams under impact load by examining the reinforcement effect, structural toughness, and damage mode of PC composite beams with bonded steel. Additionally, a scientific basis and practical guidance are provided for the actual project. Their impact resistance can significantly affect the overall safety of a structure when subjected to an impact load. Three of the four PC beams used in this investigation were strengthened with steel plates. Residual flexural bearing capacity tests and drop weight impact tests were then conducted. The impacts of steel plate thickness and U−shaped steel plate hoops on the failure mechanism and dynamic response of the component were investigated. The dynamic responses obtained from the experiments included the displacement–time history curve, impact force, and support reaction force. In order to explore the failure mechanism of the partially precast beam during the impact process, a staged analysis was conducted based on the failure mode and dynamic response characteristic values of each curve. Residual flexural bearing capacity tests were used to examine the residual flexural bearing capacity of PC beams strengthened with bonded steel plates. The results of the research reveal that the failure mechanisms of each test beam are bending–shear failures. With the increase in bonded steel thickness, the peak mid−span displacement reduced by 6.55%, the residual mid−span displacement decreased by 29.53%, and the residual flexural bearing capacity improved by 25.02%. With the adoption of U−shaped steel plate hoops, the residual flexural bearing capacity significantly increased while the peak mid−span and residual mid−span displacements both decreased.

Numerical simulation research on the overturning of gantry crane by downbursts

Based on the simulation of the fluid-structure interaction response, the cause of an overturning of a gantry crane induced by a downburst in Shenzhen is studied in this paper. According to the results, (1) Vicroy's downburst model could establish the steady-state wind field of the downburst more reasonably when there was only low-level wind speed observation data, and its simulation results were close to the two-dimensional downburst numerical simulation results; (2) Compared with the normal exponential vertical profile of wind speed, the disturbance caused by the front girder of the double-girder gantry crane structure under the downburst wind field was more severe, which increases the probability of the gantry crane overturning. (3) The downwind displacement of the main girder of the gantry crane under the condition of downburst is far greater than that under the normal condition. At the same time, under the condition of downburst, the pressure difference on the surface of the gantry crane was greater, and the distribution of the support reaction force was more uneven, resulting in a stronger overturning tendency of the gantry crane. (4) Under the condition of downburst, the overturning moment and the shearing force borne by the foundation of gantry crane exceeded the critical value to maintain the stability of the gantry crane by the gravity, resulting in the overturning of the gantry crane.

Bulletproof optimisation design of helicopter cockpit subfloor

Cockpit bulletproof floor and subfloor of the helicopter were modelled in a simplified manner, and the display dynamics analysis was combined with the statics analysis to investigate the responses of the composite bulletproof floor and determine its boundary support reaction force. Numerical simulations of projectiles with various velocities and incidence angles impacting on the target plate were investigated. The floor support reaction force was loaded on the subfloor, and the response of the subfloor under the impact of projectile was studied indirectly using the statics analysis tool. Moreover, the optimisation strategy was conducted based on the above strategy. The design variables of the subfloor were analysed using the defined correlation, the mass condition, the strength condition and the correlation ratio equations to reasonably reduce the range of design variables. Different optimisation strategies were adopted to enhance the ballistic performance of the subfloor. A combined patch-MOGA-AMO optimisation strategy was developed to achieve high-efficiency and high-quality optimisation, which had a proper computation speed and achieved suitable optimisation results.

Effect of close-in successive explosions on the blast behaviors of reinforced concrete beams: An experimental study

The blast performance of reinforced concrete (RC) structures subjected to successive explosions remains an unresolved issue. This study experimentally investigated the blast behaviors (failure modes and dynamic responses) of RC beams under successive explosions of two 0.5 kg TNT. Furthermore, the cumulative effect of two 0.5 kg TNT explosions was studied by comparing the successive explosion-induced blast behaviors of beams with the single 1 kg TNT explosion-induced blast behaviors of beams both at the same standoff distance and at the same scaled distance. In addition, based on the support reaction force and the relation between reaction force and mid-span displacement, the true dynamic load carrying capacity was defined, and the residual load carrying capacity, residual stiffness and absorbed energy were used to assess the damage degree of RC beams caused by successive explosions. Results indicate that beams under successive explosions experienced a transformation of failure mode from local failure in brittle mode to a local and bending failure in ductile mode. And compared to the effect of a single 1 kg TNT explosion on the damage to beams, the cumulative effect of two 0.5 kg TNT successive explosions on the damage to RC beams is more significant at the same scaled distance, especially at smaller scaled distances. Furthermore, the effect of the first explosions on the residual load carrying capacity has an effect on the subsequent displacement responses of the damaged beams.

Analysis of Dynamic Load Characteristics of Accelerated Pavement Testing Equipment Based on Virtual Prototype Model

The purpose of this paper is to study the actual dynamic load characteristics of a full-scale Accelerated Pavement Test (APT) device called Natural Environment-Automatically Loaded Track (NE-ALT) during its operation. The NEALT uses hydraulic and support reaction forces to apply axle loads, which are somewhat different from real trucks. Therefore, in order to ensure the accuracy of the loading parameters of the device, it is necessary to analyze the dynamic load characteristics of the device during operation. In this paper, a virtual prototype model of the device was established, and the important parameters, including vehicle speed and axle load, were set. The dynamic axle load, dynamic load coefficient, and influential factors of the NE-ALT were analyzed using the model at different speeds, hydraulic pressures, and road roughness. The results have shown that the dynamic axle load accuracy was most affected by speed, followed by road roughness, and then hydraulic cylinder pressure. Compared with the real truck, its dynamic load stability was better than the real truck due to the restriction of the guide rail in the acceleration loading system and the method of hydraulic loading, and the larger the load, the more stable the load, which was different from the real truck. Therefore, in the design of accelerated pavement loading experiments, the dynamic axle load characteristics of equipment need to be considered. The results of this study can provide guidance for the further improvement and application of the NE-ALT.

Structural Parameters Optimal Design of the Upper Carriage Structural of a Truck-mounted Howitzer Under Multiple Working Conditions

In order to reduce the force transmitted from the upper carriage of a Truck-mounted howitzer to the lower carriage, the upper carriage is optimized for structural parameters under the premise that the position of the trunnion chamber is allowed to change. Based on the secondary development function of ABAQUS, established the parametric modeling script of the upper carriage structural, and built the ABAQUS computing environment through the integration of Simcode components of the ISIGHT platform. The position parameters of the trunnion chamber on the upper carriage were selected as the design variables, and the maximum support reaction force was minimized as the optimization objective. The multi-island genetic algorithm was used to optimize the structure parameters of the upper carriage under multiple working conditions, and the global optimal solution was obtained. The optimization results meet the rigidity and strength requirements, and the optimization effect is obvious. This optimization method can be used in the design of the upper carriage structure, reducing the force transmitted from the upper carriage of the artillery to the lower carriage, and can provide a certain optimization space for the weight reduction of the lower carriage, and has engineering application value.

Experimental study on consistency of the impact performance between composite beams and reinforced concrete beams

Composite (CC) beams are employed more and more extensively because of their advantages in environmentally-friendly and rapid construction. These beams are possibly subjected to impact loadings due to occasional accidents or terrorist attacks during the service. It should be clarified whether the previous research achievements on the impact performance of reinforced concrete (RC) beams can be directly applied to CC beams. Five groups of full-scale CC beams and RC beams were fabricated with the same reinforcement ratios. One group of these specimens was tested under static bending loading, and the other eight specimens were tested under impact loading through the drop hammer test system. The failure modes, deformation, and force response of CC beams and RC beams were compared. The experimental results presented that the failure modes of CC beams are consistent with those of RC beams in the impact energy range of 1.0 Es ∼ 3.5 Es. The increasing impact energy changes the failure mode of CC beams from flexure failure to flexure‐shear failure until shear failure. With the increase of impact energy from 1.0 Es to 3.5 Es, the residual deformation increases first and then decreases, and the impact force of CC beams and RC beams are increased by 55.9% and 78.2%. There is little difference between CC beams and RC beams in peak deformation and residual deformation, a similar trend is found in impact force and support reaction force. Moreover, the beams can perform well impact resistance in the range of 1.0 Es ∼ 2.3 Es. Based on the residual deformation under impact loading and the deformation under static loading, the damage assessment method was proposed to evaluate the damage level of beams subjected to impact loadings.

Numerical simulation of fully grouted rock bolts with or without faceplates based on the tri-linear bond-slip model

A difference scheme of the governing equation of the bolt-grout interface of the fully grouted rock bolt was derived based on the tri-linear bond-slip model, local equilibrium condition, and finite difference method. The corresponding solution formats of the fully grouted rock bolts with or without faceplates were proposed according to their different boundary conditions. Consequently, a numerical model of the fully grouted rock bolts with or without faceplates was established. This model is able to simulate the bonding, softening, and decoupling characteristics of the bolt-grout interface of the fully grouted rock bolts with or without faceplates subjected to the pullout load or rock deformation. The prediction results of this model agree well with the pullout test results, the calculation results of related scholars, and the analytical solutions, which proves its correctness. Then, the formulas of the support reaction force of the rock bolts with or without faceplates were derived according to their support mechanisms, and the support reaction force was applied during the iteration to simulate the bolt-rock interaction. This method is convenient for engineering applications owing to that it does not need to add additional degrees of freedom for rock bolts. The abovementioned model and method were incorporated into a self-developed FEM program and the effect of the initial deformation of the surrounding rock before bolt installation was considered, resulting in a numerical simulation program for fully grouted rock bolts with or without faceplates in underground caverns. Finally, this program was applied in a circular tunnel and the influences of the faceplate, bolt installation timing, bolt length, and bolt radius on the support performance of rock bolts were investigated. The following conclusions were obtained. 1) The faceplate can greatly improve the support effect. 2) The main failure mode of the rock bolts without faceplates is the shear damage at the bolt-grout interface, while the bolt pull-off is the dominant failure mode of the rock bolts with faceplates. 3) There is a critical value of bolt length. Increasing the bolt length within the critical value can significantly enhance the support effect, whereas increasing the bolt length beyond the critical value has little effect on the support effect. 4) Increasing the bolt radius can effectively enhance the support effect.

APLICAÇÃO DO MÉTODO DE TREINAMENTO SUSPENSO NOS ESPORTISTAS

ABSTRACT Introduction: Suspension training is a new activity in which exercises are performed exploring the body weight as resistance, using a suspension tape. The body remains in constant motion due to the support reaction force formed by the open kinetic chain, requiring rapid muscle contractions for continuous balance adjustment. It is believed that this training can improve proprioceptive neuromuscular function, although there is little scientific evidence of its benefits on body posture in athletes. Objective: Explore the function and application of the overhead training method in athletes. Methods: Sixteen male athletes from a provincial badminton team volunteered for the research. Divided into two groups, the experimental group added suspension training. In contrast, the control group kept only traditional training, the other training contents were the same between the two groups, and the experiment lasted 12 weeks. The relevant data were collected before and after the intervention period by the GoodBalance balance tester, and the balance ability of all athletes with eyes closed on one foot was evaluated. Results: The balance ability of the athletes in the experimental group was significantly improved, while the balance ability of the athletes in the control group changed little. Conclusion: Suspension training can significantly improve the balance ability of athletes and can be used as an effective auxiliary training method for balance improvement. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

Evolution of gliding in squirrel-related rodents (Mammalia: Sciuromorpha) did not induce a new optimum on the cortical thickness of the scapular glenoid fossa.

Many of the squirrel-related rodents (i.e., Sciuromorpha) are tree-dwelling species known to be very agile climbers. This taxon also includes the most diverse clade of gliding (aerial) mammals that likely descended from a non-gliding arboreal ancestor and evolved a patagium (i.e., a gliding membrane) to increase gliding performance. Glides can cover distances of up to 150 m and landing is typically accomplished by stalling the patagium to reduce impact velocity. It remains unclear if this behavior suffices to keep stresses on the locomotor apparatus similar to those experienced by their arboreal relatives or whether gliding behavior increases landing forces and stresses. The sparsely available support reaction force data are ambiguous, but bone microstructure is highly adaptable to changes in loading regime and likely provides insights into this question. Using μCT scans, we compared the cortical thickness of the glenoid fossa of the shoulder joint between arboreal and aerial Sciuromorpha using evolutionary model comparison, while also accounting for regional differences of the glenoid fossa. We did not find any differences between these locomotor behaviors, irrespective of the glenoid region. These findings agree with previous analyses of the microstructure of the femur in Sciuromorpha. We discuss different aspects that could explain the similarity in cortical thickness. According to our analysis of glenoid cortical thickness the loading regime appears not to have changed after the evolution of gliding locomotion, likely due to adjustments in landing performance.

Effects of support type and geometric shape of steel tube on concrete-encased concrete-filled steel tube beam under low velocity impact

Concrete-encased concrete-filled steel tube (CEFST) beams prepared by placing steel tube in RC beam is a beam type that has widespread use. The current study examines the effects of steel tube geometry and support conditions on the behavior of CEFST beams under low velocity impact loading. First, CEFST beam specimens with different lengths and different tube section geometries (circular and square) were produced in the laboratory. These four test specimens with two different support conditions were exposed to low velocity impact load tests. Finite element models of the test specimens were created using Abaqus\\Explicit software. In the next stage, 4 finite element models were verified by the experimentally obtained damage conditions, maximum displacements, and support reaction forces. In the final stage, as parametric study 12 finite element models were prepared in addition to 4 verified models and analyzed under low velocity impact loading. In addition to experimental values, Von Mises stresses, Equivalent plastic strain, Friction energy, and Damage energy values were also obtained by the numerical study and thus the effects of steel tube geometry and support conditions were comparatively examined. The obtained results showed that CEFST beams with a square tube section exhibited better performance under a sudden load such as impact compared to the beams with a circular tube section. Moreover, both numerical and experimental results pointed out that the beam length beyond support has a positive impact on the performance of beam under impact loading.

Analysis of Surrounding Rock Pressure of Deep Buried Tunnel considering the Influence of Seepage

This paper takes the surrounding rock of deep tunnel as the research object and considers the action mechanism under the influence of seepage. Based on the Mohr-Coulomb criterion, the stress mechanism of surrounding rock of deep buried tunnel is analyzed by a convergence constraint method. Based on the elastic-plastic solution, the nonlinear elastic-plastic solution of the interaction between surrounding rock and lining structure considering the effect of seepage force is proposed, and the radius of surrounding rock plastic zone is obtained. The relationship between surrounding rock stress and displacement, radial deformation of lining, and support reaction force was observed. At the same time, considering the effects of seepage, strain softening, and intermediate principal stress, the surrounding rock is divided into a plastic residual zone, plastic softening zone, and elastic zone, and the stress distribution expressions of the plastic zone and each zone of surrounding rock of circular tunnel are derived. The results show that with the change of nonuniform permeability coefficient, the seepage shows anisotropy in different directions, and the closer to the horizontal or vertical direction, the more obvious the influence of nonuniform permeability coefficient on pore water pressure distribution. Seepage and material softening have different effects on the distribution of surrounding rock stress field and the size of plastic zone. Material softening is more unfavorable to the stability of surrounding rock than seepage. The intermediate principal stress coefficient has a significant impact on the tangential stress and plastic zone of surrounding rock. When the intermediate principal stress effect is not considered, the calculation results are relatively conservative and cannot give full play to the strength of surrounding rock effectively. The research conclusion can provide a theoretical reference for studying the stability of surrounding rock in tunnel excavation under water-bearing rock.