High-rise Steel Structure Research Articles

Second-Order Effects on Wind-Induced Structural Behavior of High-Rise Steel Buildings

AbstractThis paper investigates second-order effects on wind-induced structural dynamic behavior of a 60-story high-rise steel structure known as the Commonwealth Advisory Aeronautical Research Cou...

Structural Health Monitoring (SHM) of Civil Structures

As newer and more reliable ways of construction were developed, civilization began to spread out further and retain functional infrastructure for longer periods of time.[...]

Seismic performance of H-section beam to HSS column connection in prefabricated structures

This paper proposes a new type of bolted assembly joint for connecting an H-shaped steel beam to a square HSS column and connecting HSS columns between each other in a prefabricated high-rise steel structure. The welding of components within the same module is completed in the factory, and the modules are assembled with bolts on site. The columns are connected via flanges and bolts; the H-shaped steel beam and HSS column are connected via cover plates that extend from the flanges, end-plates of the column base, and beam end stiffeners. Rigid and variable stiffness beam-to-column connections can be obtained by adjusting the number and specification of the bolts. The stiffness of the variable stiffness connection varies with the load. Thus, the connection can be rigid in a weak earthquake, yet the cover plate and beam flange can slip over each other strong earthquakes, which dissipates energy by slipping. The hysteretic performances of 9 joints were analysed by finite element analysis (FEA) and were tested in the paper; seismic performance metrics, such as hysteretic performance, ductility, and rotation capacity, were obtained. The bolt number, gap between the bolt shank and the bolt hole, thickness of the flange and the cover plate that impact the mechanical performance of the joint were analysed, and the slipping characteristics of the contact surface were obtained. The slipping between the cover plate and beam flange increases the assembly's capacity of deformability, ductility, energy dissipation, and slipping energy dissipation without significantly reducing its ultimate bearing capacity.

Analysis of the Key and Difficult Points in the Engineering Construction Technology of the Steel Structures of a Super High-rise Building

In recent years, with the rapid development of the economy of China, the traditional building structure has not been able to meet the current people’s demands and the super high-rise building has become a symbol of a city. In the current period, the research on the super high-rise building in the architectural industry of China is late and the technical blanks exist in some construction difficulties in the super high-rise steel structures. Based on the above, a brief analysis and discussion on the difficult construction technology in the steel structures of a super high-rise building and some measures are presented for reference of the relevant personnel in this paper.

Performance analysis and design of bolted connections in modularized prefabricated steel structures

The present study proposes a new-type all-bolted connection that can be used to connect trusses to columns and columns to columns on site in modularized prefabricated multi-rise and high-rise steel structures. The proposed connection connects columns through flanges, connects trusses to columns through cover plates that extend from the flanges and through vertical connecting plates and joint flitches. The stiffness of the connection can be controlled by adjusting the number or size of the bolts and undergoes step-like change as the load changes. Therefore, the connection can be rigid during weak earthquake, while the cover plates can slip relative to the chord members during strong earthquake, thereby dissipating energy. The FEA results was compared with experimental results and showed good agreement at all stages of loading, then the static performance of six connections with different friction coefficient or size of components were studied by FEA. The FEA results were used to determine mechanical properties of the connections that were difficult to obtain from the tests, such as the changing rule of the bolt tension, the stress distribution of bolt, the contact force on various contact surface, and the pressure on the wall of bolt hole, as well as the effects of friction coefficient on the performance of the connections. The mechanical model of the connection was established and the mechanical mechanism of the connection was got. Furthermore, simplified calculating formulas for the connection under slip state, yield state and ultimate state were proposed respectively.

Wind-Induced Fatigue Analysis of High-Rise Steel Structures Using Equivalent Structural Stress Method

Welded beam-to-column connections of high-rise steel structures are susceptive to fatigue damage under wind loading. However, most fatigue assessments in the field of civil engineering are mainly based on nominal stress or hot spot stress theories, which has the disadvantage of dependence on the meshing styles and massive curves selected. To address this problem, in this paper, the equivalent structural stress method with advantages of mesh-insensitive quality and capability of unifying different stress-life curves (S-N curves) into one is introduced to the wind-induced fatigue assessment of a large-scale complicated high-rise steel structure. The multi-scale finite element model is established and the corresponding wind loading is simulated. Fatigue life assessments using equivalent structural stress method, hot spot stress method and nominal stress method are performed, and the results are verified and comparisons are made. The mesh-insensitive quality is also verified. The results show that the lateral weld toe of the butt weld connecting the beam flange plate and the column is the location where fatigue damage most likely happens. Nominal stress method considers fatigue assessment of welds in a more global way by averaging all the stress on the weld section while in equivalent structural stress method and hot spot method local stress concentration can be taken into account more precisely.

Effect of Span Length on Behavior of MRF Accompanied with CBF and MBF Systems

The main objective of this study is to quantify effects of variations of aspect ratio (ratio of span length to story height) and lateral resisting system on response of high-rise steel structures. In the present research two goals of finding optimum aspect ratio in the smallest sensible system and suitable strengthening system have been followed. In order to compare sensitivity of different lateral systems, twelve 15-story structures equipped with the following three systems were modelled: a) special moment resisting frames (SMRFs), b) dual system of intermediate moment resisting frames and special concentrically braced frames (MRF-CBF) and c) dual system of intermediate moment resisting frames and mega braced frames (MRF-MBF). Analytical results show that using MRF-CBF system not only does not reduce lateral displacement and drift of the SMRF system, but also increases these parameters. If design is based on lateral displacement and drift, using the MRF-CBF system is not appropriate decision for reinforcement while the MRF-MBF system is extremely useful for this purpose.

Research on the Seismic Design of High-rise Steel Building Based on Security Perspective

In recent years, with the continuous development of the construction industry, the development of high-rise steel structure growth fast in China. At the same time, it is very important to analyze the structure of these high-rise steel Building, especially the seismic performance analysis. In this paper, the authors analyze the seismic performance of high rise buildings by using finite element modeling, dynamic and static analysis. Through the static analysis of steel structure that combined with dead load, live load and wind load, the result shows that when steel support under the force, the maximum node stress mainly appears in the low-end and the ninth layer, which is located in 19, 22 axis node stress is the largest, respectively as 65.9Mpa, 62.6Mpa, it is safety and within the strength limit. The results can provide a theoretical basis for the seismic design of steel structure buildings

Numerical Analysis of Seismic Performance and Structural System of High Rise Steel Structures

Numerical Analysis of Seismic Performance and Structural System of High Rise Steel Structures

Static and seismic experiment for bolted-welded joint in modularized prefabricated steel structure

This study proposes a type of bolted-welded beam–column joint for modularized prefabricated multi-rise and high-rise steel structures. The components in the same module are welded in the factory, and the modules are quickly assembled using the proposed joint at site. The static performance, hysteretic performance, skeleton curves, ductile performance, energy dissipation capacity, rotation capacity and stiffness degradation patterns of four joints are obtained by model experiment and finite element analyses, and the effect of thicknesses of the chords and web members on the static and seismic performance of the joint as well as the effect of welding quality are investigated. The results show that due to the presence of the bolted connecting parts, the proposed joints maintain relatively good seismic performance including ductile performance, energy dissipation capacity and plastic rotation capacity, and good static bearing capacity after the welding seams fracture, so they can be used in structures of seismic zones. Reducing the thicknesses of the chord and the web members can significantly decrease the load-bearing capacity of the joint; however, this decrease is not proportional to the decrease of the cross-sectional area. In addition, reducing the thicknesses of the chord and web members has no significant impact on the ductile performance and energy dissipation capacity of the joint. Simplified computation formulas for load-bearing capacity of the joint were proposed and the computation results get along well with the experimental results.

Design and Specification Compilation of a Modularized Prefabricated High-rise Steel Frame Structure with Inclined Braces Part I: Integral Structural Design

Modularized prefabricated steel structures have certain obvious advantages, i.e., rapid construction, industrial-scale production and pro-environmental aspects, and are the main method in industrialization of steel structures. Although applications of these structures have been reported all over the world, in most cases, the steel structural systems are only suitable for low-rise buildings, and their application in high-rise buildings is quite limited. This paper proposes a new type of modularized prefabricated high-rise steel frame structure with inclined braces. Based on the T30 hotel building, the mechanical properties, failure mode, failure mechanism and elastic-plastic development laws are investigated by using the elastic design of a structure under various load conditions, the analysis of the internal force and displacement responses under frequent earthquakes via the response spectrum method and linear time-history analysis, the static elastic-plastic pushover analysis under rare earthquake conditions. According to finite element simulations and testing, elastic and elastic-plastic structural design methods are proposed in this paper. This work provides an important reference for research and design of the same type of modularized prefabricated high-rise steel structures, and the design method has been compiled into design specification.

Design and Specification Compilation of a Modularized Prefabricated High-rise Steel Frame Structure with Inclined Braces Part II: Elastic-plastic analysis and Joint Design

Modularized prefabricated steel structure has some obvious advantages, such as fast construction, industrial-scale production and environment-friendliness. Although it has been used for low-rise buildings, its applications in high-rise buildings are quite less. The elastic-plastic time-history analysis under rare earthquake conditions is performed on a 30-floor building. The changing law of the base shear force, the story drift angle, the stress, the damage characteristics, etc. are studied. According to the theoretical analysis, the finite element simulation and the model test, the design methods and the relevant formulas regarding the elastic and elastic-plastic properties of the beam-column connection joints, the column flange joints and the inclined brace joints are proposed in this paper. The control parameters for the structural design are also discussed. This paper provides an important reference for the research and design of the same type of modularized prefabricated high-rise steel structures, and the design method has been compiled into design specification.

The Elastic-Plastic Time History Analysis on High-Rise Steel Structure about Main Power House of Thermal Power Plant

in this paper, elastic-plastic time history analysis was carried out on the new power plant structure jointing the boiler steel frame and high-level framework workshop. Results show that main factory building structure owns rather excellent integration stiffness, good seismic performance and outstanding ability to resist lateral deformation. In addition, the interlayer displacement angle satisfies the requirement of seismic deformation calculation under severe earthquake action.

The Action of the Top Tank as TLD in High-Rise Steel Structure

A tank with large capacity and high position results in a negative impact on structural seismic resistance usually, but these tanks can be modified to act as tuned liquid dampers (TLD). A high-rise steel structure with 14 stories with this kind of tank is analyzed in this paper to introduce the action about the tank-TLD. A finite element fluid-structure interaction model is established for ABAQUS software and the effects of different parameters, and the optimal parameters about the tank-TLD are studied.

Displacement Control Technology on High-Rise Steel Structure about Main Power House of Thermal Power Plant

With the background of optimal design study on main powerhouse of Power Plant, the finite element software ANSYS is adopted to control the overall structure's displacement. After the choice of structural form and loads bearing system, the static and dynamic characteristics of this boiler steel frame are analyzed in detail. And the structure's displacement response of this boiler steel frame will also be discussed under permanent load, wind load and seismic action. The structural displacement response causing by four wind load cases (front wind, back wind, left wind and right wind) is emphatically discussed and the dynamic characteristics and response spectrum analysis are also be studied. Results show that this main powerhouse owns good seismic performance and excellent lateral displacement resistance capacity because of the high structure stiffness. It shows that the horizontal displacement of the whole structure under all load cases can meet the requirements of the limit value, which demonstrates the feasibility of this structural program.

Calculation and Application of Steel-Concrete Composite Beams Stiffness Amplified Coefficient

Steel-concrete composite beams have been widely used in the high-rise buildings and large span steel structure. Composite beams effective flange width has been further investigated in domestic, as well as the force and deformation within elastic stage and plastic stage. In this paper, we give out the formula derivation of steel-concrete composite beams stiffness amplified coefficient. Combined with a practical engineering, we analysis the impact of stiffness amplified coefficient on the whole structure by SAP2000 software and compare the results back and forth. In the end, we put forward some suggestions for construction engineers.

Research on Structural Stability of Prilling Tower in Fertilizer Industry

Prilling tower is the core structure in the technological process of Nitro-compound fertilizer plant, whose safety is directly related to the normal operation of fertilizer production. Prilling tower is a hollow high special structure which is constructed by concrete-filled steel tubular (CFT) columns bonded by annularity truss and widely used in fertilizer plant. The stability study of the tower is still a blank at present as the structure's specific form. In this paper, buckling analysis is used to analyze the structure in order to define the CFT prilling tower's effective length, according to its characteristics. Its effective length is calculated with equivalent negative stiffness method and the stiffness demands of annularity truss are identified. Elastic-plastic stable assessment of structural stability is carried on using advanced analysis method. A new load model and evaluation method (lateral loading method) has been proposed based on advanced analytical results, which is suitable for evaluating elastic-plastic stability of high-rise steel structure. The stability design methods of such structures are also presented according to the analytical results, providing reference for similar structures and projects.

The Case Analysis of Adding-Storey and Strengthening Design of Certain Single-Span Steel Structure of High-Rise Building

A high-rise steel structure which has been used for 21 years and has horizontally single-span structure, hinged nodes of columns-beams and removed column bracings was added four stories directly and evaluated the aseismic performance. Analysis shows that as a complicated system engineering, reinforcement scheme selection should take feasibility, safety and economy into account. In the meanwhile, anti-seismic standards and later working life should be reasonably determined in order to achieve the goal which not only uses previous structure but also saves the cost. Improper use of existing building will increase irregular degree of structure which will increase the destructive effect of earthquake. In order to ensure the overall performance of reinforced structures, taking reasonable reinforcement scheme and feasible construction technique are necessary.

Numerical Analysis of High-Rise Steel Structure with Wind Turbines under Earthquake Action

The utilization of new energy sources, like wind power, has become more and more popular as the global energy crisis escalated. Preliminary mechanical analysis was done to verify the feasibility of a new type of building structure, integrated high-rise steel structure with vertical axis wind turbines. Time history analysis under the action of EI-Centro earthquake wave and Wenchuan earthquake wave were carried out on the model with wind turbines and the other one without. The seismic behavior of this new structure was analyzed.

Static Analysis on Integrated Building of Steel Structure with Wind Turbines under Equivalent Wind Load

More and more attention has been paid on the development and utilization of new energy sources, as the global energy crisis escalated. Combined with the concept of wind energy generation and High-raise steel structure, a new type of building structure is proposed integrating high-rise steel structure with vertical axis wind turbines. Static analysis under equivalent wind load of seven different wind pressures were carried out on two models, one with wind turbines and the other one without. The feasibility of this new structure was verified preliminarily by comparing analysis results.