Composite Girder Cable-stayed Bridge Research Articles

Experimental Study on Field Shrinkage of Deck Panel of Composite Girder Cable-stayed Bridge

In order to study the shrinkage performance of the deck panel of the composite girder cable-stayed bridge, the shrinkage test of the deck panel members of the real bridge was carried out in the field with the background of the Malukou Great Bridge, comparing the difference between the shrinkage values measured in the test and the theoretically calculated values of shrinkage in the various specifications, and finally the shrinkage equations and curves of the deck panel in 180d were fitted based on the test data. The results show that: on 180d, the shrinkage strain calculated by JTG D62-2018, the current design specification used for highway bridges in China, is only 66.30% of the test shrinkage, and the small prediction of bridge deck shrinkage may cause problems in terms of structural cracking; based on the large differences between various specifications for the shrinkage strain of bridge decks, It is recommended to use the actual shrinkage strain measured by the bridge deck shrinkage test as the real shrinkage curve as the data source to accurately assess the deformation and stress state of the bridge deck.

Correction Technology for Main Girder Torsion in a Composite Girder Cable-Stayed Bridge

Correction Technology for Main Girder Torsion in a Composite Girder Cable-Stayed Bridge

Optimization of Construction Process and Determination of Intermediate Cable Forces for Composite Beam Cable-Stayed Bridge

This paper presents a comprehensive study of the Xiangsizhou Bridge, a double-tower double-cable steel–concrete composite girder cable-stayed bridge located in Pingnan, Guangxi, China. A finite element model of the full-bridge spatial truss system was established using a dual main beam simulation of the steel–concrete composite girder. To obtain the initial reasonable bridge state, the minimum bending energy method was employed, followed by optimization of the state using the unknown load coefficient method to attain the final reasonable completion state. This paper proposes an innovative construction scheme for the erection of the main girders, which is designed to address the issue of excessive tensile stresses in the bridge deck slabs that can arise in conventional construction schemes. This scheme can save about 4 months of construction time and shorten the construction cycle of main beam erection by 60%. Furthermore, the study derived and verified a formula for the intermediate cable force during the construction process, which demonstrated its effectiveness. This study provides practical value for the design and construction of similar bridges.

Aerodynamic performance evaluation of steel-UHPC composite deck cable-stayed bridges with VIV countermeasures

The steel-ultrahigh performance concrete (UHPC) composite girder makes the bridge deck thinner and more streamlined, but their effects on the aerodynamic performance of cable-stayed bridges are unclear. With the developed equivalent girder analysis method, the overall aerodynamic performance (e.g. vortex-induced vibration (VIV), flutter, aerostatic and buffeting performance) of a steel-UHPC composite girder cable-stayed bridge with various VIV countermeasures are systematically evaluated by conducting a series of wind tunnel tests and numerical calculation. The results show that the developed equivalent girder analysis method could simplify the sectional model design of the composite girder for wind tunnel tests. Only the guide vane removal cannot suppress the torsional VIV responses among various combinations of guide vanes removal, while the two VIV countermeasures (e.g. the removal of outside railing cornerstones, the removal of four guide vanes and outside railing cornerstones) could reach about 76% and 72% of the torsional VIV amplitudes, respectively. Although two VIV countermeasures could slightly reduce the critical flutter wind speed, their torsional divergence critical wind speeds are much larger than the limited design requirement. Moreover, the removal of four guide vanes and outside railing cornerstones has the capacity of improving the aeroelastic and buffeting performance of the bridge, as the best overall aerodynamic performance.

Study on Key Technology of Assembling Installation of Long-Span Composite Girder Cable-Stayed Bridge

PDF HTML XML Export Cite reminder Study on Key Technology of Assembling Installation of Long-Span Composite Girder Cable-Stayed Bridge DOI: 10.59238/j.pt.2023.01.007 Author: Affiliation: (Sichuan Highway Planning, Survey, Design and Research Institute Ltd. , Chengdu 610041, China) Clc Number: Fund Project: Article | Figures | Metrics | Reference | Related | Cited by | Materials | Comments Abstract:The Nanxi (Xianyuan) Yangtze River Bridge in Yibin is a composite beam cable-stayed bridge with twin towers and double cable planes and a main span of 572 m. The superstructure is erected by the assembly method. In order to ensure the precise installation and control of internal forces for steel girders and bridge deck slabs of composite beams while also considering the construction efficiency of composite beams, a control method for the installation and erection of the superstructure has been proposed. This method is based on optimizing the internal force and geometric states of segments throughout the entire process, achieved by establishing finite element calculation models for both the full bridge and segmented sections and combining these with comparative studies of on-site monitoring data. With the installation stress and precision of composite beams properly controlled, construction efficiency has been enhanced through the optimization of the pouring process for wet joints between steel girders and concrete bridge deck slabs, as well as the tensioning process for stay cables. The equivalent tension method is applied to the tension process of the stay cable, thus ensuring the uniformity of the cable force of the steel strand. The relevant conclusions are applicable to the same type of composite girder cable-stayed bridge erection construction. Reference Related Cited by

Shear Lag Effect Study of a Composite Girder Cable-Stayed Bridge During Construction

Shear Lag Effect Study of a Composite Girder Cable-Stayed Bridge During Construction

Model Test of Steel-Concrete Composite Beam Deck under Negative Moment

In order to understand the mechanical properties and force transfer law of steel-concrete composite beam deck under negative bending moment, and further guide the design. Based on a steel-concrete composite girder cable-stayed bridge, the model test of the mechanical behavior of the steel-concrete composite girder deck under the action of negative moment was carried out. The characteristics of mechanical failure and mechanical properties were analyzed.

Chaoyang Bridge, China: a double-deck cable-stayed bridge with corrugated steel webs.

Completed in 2016, Chaoyang Bridge in China is the world’s first double-deck composite girder cable-stayed bridge with corrugated steel webs. It provides a dual four-lane highway above with cantilevered footways and cycleways below. As described in this paper, the bridge features several design innovations. These include the first use of corrugated steel webs for a cable-stayed double-deck crossing, new cable anchorage technology and a building information modelling management system to resolve structural defects.

Safety evaluation method of composite girder cable-stayed bridge based on structural health monitoring system

A comprehensive safety evaluation method which can dynamically reflect the damage changes in operation state is established based on the structural health monitoring (SHM) system of a composite girder cable-stayed bridge. The fuzziness and uncertainties during the evaluation process are considered and the random errors are reduced by using the proposed evaluation method. The normal values and safety limits of monitoring indexes of the Guanhe Bridge are proposed by using numerical simulation and monitoring data statistics of the baseline finite element model, and the index evaluation standard of the related code requirements. The results can be used to complement the lack of online monitoring indexes in the existing regulations, and solve the problem that lacking support for quantitative monitoring data in current bridge management system evaluation module, which can provide theoretical basis for the evaluation, management, maintenance and decision-making of bridge structures.

Nonlinear Stability Analysis of a Composite Girder Cable-Stayed Bridge with Three Pylons during Construction

Based on the nonlinear stability analysis method, the 3D nonlinear finite element model of a composite girder cable-stayed bridge with three pylons is established to research the effect of factors including geometric nonlinearity, material nonlinearity, static wind load, and unbalanced construction load on the structural stability during construction. Besides, the structural nonlinear stability in different construction schemes and the determination of temporary pier position are also studied. The nonlinear stability safety factors are calculated to demonstrate the rationality and safety of construction schemes. The results show that the nonlinear stability safety factors of this bridge during construction meet the design requirement and the minimum value occurs in the maximum double cantilever stage. Besides, the nonlinear stability of the structure in the side of edge-pylon meets the design requirement in the two construction schemes. Furthermore, the temporary pier can improve the structure stability, effectively, and the actual position is reasonable. In addition, the local buckling of steel girder occurs earlier than overall instability under load in some cable tension stages. Finally, static wind load and the unbalanced construction load should be considered in the stability analysis for the adverse impact.

Technology of Precasting and Installing for Integral Segment in Composite Girder Cable-Stayed Bridge

The main bridge of Quanzhou Bay Sea-Crossing Bridge is a composite girder cable-stayed bridge with span arrangement (70+130+400+130+70) m and with double pylongs,separated decks.It’s the first time to using the dry joints assembly in composite girder cable-stayed bridge,the technology of precasting and installing for integral segment is introduced.

Construction Scheme Research of Long-Span Cable-Stayed Bridge with Three Pylons Based on Structure Stability

This paper took the Wuhan Erqi Yangtze River Bridge as an example, using MIDAS software to simulate the working procedure of cantilever construction, and established the finite element model of composite girder cable-stayed bridge with three pylons during construction stage. Based on the first kind stability theory, this paper researched the influence of the different construction scheme, the setting of temporary pier, temperature load, and unbalanced construction load on the structure stability of composite girder cable-stayed bridge with three pylons so as to obtain the linear elastic stability safety coefficients of structure during construction stage, and then provided the theoretical explanation to the reasonable construction scheme and safety construction. The results showed that for the Wuhan Erqi Yangtze River Bridge, its linear elastic stability safety coefficients of structure during construction stage have met the code requirement. Besides, the buckling mode changed from the longitudinal buckling of pylon to combined instability of pylon and girder. Furthermore, the setting of temporary pier was reasonable, which effectively improved the linear elastic stability safety coefficients. Finally, temperature load and unbalanced load in construction reduced the linear elastic stability safety coefficients.

Inspection and Evaluation of Load-Bearing Capacity of Single Tower Composite Girder Cable-Stayed Bridge

In order to evaluate single tower composite girder Cable Bridge actual bearing capacity and working property on design using load, a single-tower composite girder cable-stayed bridge is taken as an example, by means of static load test, dynamic load test, reasonably measures evaluates the single tower composite girder cable-stayed bridge's bearing capacity. The static load test measure static properties of bridge structure (static strain, static deflection, etc.), dynamic load test, measure the dynamic properties of bridge structure (vibration frequency, damping, forced vibration amplitude, impact coefficient, etc.). Results show that the rigidity strength integrity and dynamic characteristics of bridge structure are favorable; the structure’s bearing capacity is favorable.

Geometrically Nonlinear Analysis of Composite Girder Cable-Stayed Bridge with Three Towers in Completion Stage

Based on nonlinear finite element theory, the spatial nonlinear FE model is proposed by link elements, shell elements and spatial beam elements. The different nonlinear behavior of composite girder cable-stayed bridge is analyzed under dead load in completion stage. The nonlinear analysis involves cable sag, large displacement and beam-column for composite girder cable-stayed bridge with three towers. The various nonlinear factors effect on internal force of side tower, and main girder stress are researched. The results show cable sag effect is larger than large displacement and beam-column for girder upper stress, and the sag effect is 16% on the average at the mid of the main span. The nonlinear effect on bending moments is larger than stress and axial force for side tower. The full nonlinear effect on bending moments is only -3.7%, but less than 1% on stress and axial force.

Study on Ultimate Load-Carrying Capacity of Long-Span Composite Girder Cable-Stayed Bridge with Three Pylons

Taking a long-span composite girder cable-stayed bridge with three pylons under construction as the object of research, this paper establishes a three-dimensional finite element model of a bridge considering the geometric nonlinearity, material nonlinearity and interface slip effect in composite girder, and analyzes the failure loads and failure modes of the structure at bearing capacity limited state. The results show that the ultimate load-carrying capacity is high at bearing capacity limited state, load case whose live load acts on one main span is more unfavorable, and according to the structural failure modes, increasing the ability of the middle pylon to resist bending moment can improve the ultimate load-carrying capacity of the whole bridge quickly.

Effects of Stable Cable on Ultimate Load-Carrying Capacity of Long-Span Composite Girder Cable-Stayed Bridge with Three Pylons

On the background of a long-span composite girder cable-stayed bridge with three pylons under construction for research, this paper establishes two models of the whole bridge by considering the structural geometric nonlinearity, material nonlinearity and interface slip effect in composite girder, one has stable cables between pylons but the other hasn’t, then comparatively studies the failure loads and structural internal forces of the two models to achieve effects of stable cable on the ultimate load-carrying capacity of the cable-stayed bridge. This research shows that the stable cables can strengthen the vertical stiffness of structure and obviously increase the failure load of the bridge, and the internal forces in main girder, middle pylon and stayed cables are smaller and their distributions are more reasonable under the failure load than those in the bridge with no stable cables, so the stable cables can effectively improve the ultimate load-carrying capacity of long-span composite girder cable-stayed bridges with three pylons.

Geometrically Nonlinear Analysis of Long Span Composite Girder Cable-Stayed Bridge with Three Towers under Live Load

A comparison on geometrically nonlinear analysis of composite girder cable-stayed bridge is presented. The spatial nonlinear analysis model named double-girder is established, the geometrically nonlinear behavior of whole bridge is analyzed under dead load plus live load in normal service stage, the nonlinear analysis involves cable sag, large displacement and beam-column, the three nonlinear factors effect on internal force and deformation of side tower, main girder are investigated. The results show that the effect of geometric nonlinearity is small on bending moment and deformation of side tower, and also small on vertical deflection of main girders, but nonlinear effect is large on bending moment of main girders. Results obtained in this research and conclusions made provide valuable insight and guidelines for the design of composite girder cable-stayed bridge with three towers.