Process-independent construction stage analysis of self-anchored suspension bridges

Wang, Xiaoming; Wang, Huan; Sun, Yuan; Mao, Xiangyuan; Tang, Shengpeng

doi:10.1016/j.autcon.2020.103227

Cited by 34 publications

(7 citation statements)

References 35 publications

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“…∂δ T e (B L + 2B NL ) T σ 0 dV e − ∂δ T e P e = 0 (11) Transform Formula (11) to obtain Formula (12), as follows:…”

Section: The Mechanics Equilibrium Equation Of the Staged-constructio...mentioning

confidence: 99%

“…During the staged construction of a cable-stayed bridge, the tensioning operation of the cables plays an important role in the construction of the structure [8][9][10]. Since these are time-consuming and labor-intensive operations, the main aim of the cable-stayed bridge installation calculation and construction control should be to minimize the number of cable tensions and achieve the design target state of cable force after construction, so that there is no need for any final adjustment of cable force [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The construction process undergoes frequent system transformations and loadings, accompanied by complex, strongly geometrically nonlinear behavior. Accurate state assessment of such processes generally requires nonlinear finite element analysis to perform step-by-step forward and cumulative calculations based on the principle of incremental superposition [11,25]. This calculation implies that the structural equilibrium for any intermediate state of the process must be accumulated from its previous construction loading history, which is easily limited by computational effort and convergence.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Stress-Free-State Forward Analysis Method of Long-Span Cable-Stayed Bridges Constructed in Stages

Wei

Gong

et al. 2023

Buildings

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Structural analysis and construction control of staged-construction processes are major subjects in the context of modern long-span bridges. Although the forward and backward analysis methods are able to simulate situations, their main disadvantage is that they usually apply the stage superposition principle. In the actual construction process, due to changes made to the plan, the construction process needs to be adjusted at any time, and it is difficult to implement the construction process in complete accordance with the established plan. As a result, the existing simulation method based on the incremental structural analysis of each construction stage has poor adaptability to such adjustments. In this study, considering the strong geometric nonlinear behavior of the long-span cable-stayed bridge construction process, the geometrically nonlinear mechanical equations of the staged-construction bar system structure were derived. The minimum potential energy theorem was used by introducing the concept of the stress-free-state variable of the structural elements. The equation reflects the influence of the change in the stress-free-state variables of structural elements on the completion state of the structure. From the analysis of the geometrical condition that the equilibrium equation holds, the stress-free installation condition of the closing section of the planar beam element structure was obtained. A new simulation method for long-span cable-stayed bridge construction has been proposed, which is called the stress-free-state forward analysis. This method can directly obtain the intermediate process state of cable-stayed bridge construction without performing stage-by-stage demolition calculations, and causing the internal force and deformation of the completion state to reach the design target state. This method can realize the simulation of multi-process parallel operation in construction, and solves the problem of automatic filtering of temporary loads. To illustrate the application of the method, a long-span cable-stayed bridge was analyzed.

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“…∂δ T e (B L + 2B NL ) T σ 0 dV e − ∂δ T e P e = 0 (11) Transform Formula (11) to obtain Formula (12), as follows:…”

Section: The Mechanics Equilibrium Equation Of the Staged-constructio...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nonlinear Stress-Free-State Forward Analysis Method of Long-Span Cable-Stayed Bridges Constructed in Stages

Wei

Gong

et al. 2023

Buildings

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show abstract

“…Due to the progress of bridge construction technology and the demand for practicability and appreciation of municipal bridges, self-anchored suspension bridge has become a very competitive bridge type because of its economy, elegant appearance, good adaptability, and reasonable stress state [1]. At the same time, with the continuous growth of the requirement for bridge traffic capacity, the widths of bridges develop to eight lanes or even wider, which makes the proportion of structural self-weight in structural design rising gradually [2].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance Analysis and Parametric Study of a Self‐Anchored Suspension Bridge with Ultra‐Wide Double‐Sided Steel Box Girder

Tang

Liu

et al. 2021

Advances in Civil Engineering

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A sufficient understanding of mechanical performance of self-anchored suspension bridge with double-sided steel box girder is essential for design and normal use as such bridges are widely built in urban bridge. Using the Yunlongwan Bridge which is a suspension bridge with ultra-wide double-sided steel box girder as an example, this paper investigates its deformation and mechanical performance under vehicle load. Firstly, based on the field test results, the deformation performance of the bridge and the stress distribution of the main girder are analysed, with emphasis on the shear lag effect of double-sided steel box girder. Then, a multiscale model of the bridge was built, and the accuracy of the model was verified by comparison with the test data. Finally, the influence of design parameters on the mechanical behaviour of double-sided steel box girder is studied by numerical simulation. The results show that the deformation of the bridge has good symmetry, there is obvious shear lag effect on the main girder, and the U-rib thickness, diaphragm spacing, and vehicle load could significantly affect the stress of the main girder top plate. The obtained analytical results lead to a better understanding of the mechanical performance and provide reference for the design of self-anchored suspension bridge with double-sided steel box girder.

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“…SSBs differ from ground-anchored suspension bridges (GSBs) in terms of the structural system, construction process, and mechanical characteristics. Accordingly, the relevant studies have been focused on these three aspects, for example, the determination of the main cable configuration and a reasonable geometric shape for the bridge upon completion (e.g., Kim et al 2002;Yong-Gang et al 2009;Zhou et al 2019), the analysis of new construction techniques and construction processes (e.g., Lu et al 2017;Wang et al 2019Wang et al , 2020aWang et al , 2020b, and the determination of the responses to various dynamic loads, including wind loads (e.g., Li 2019a, 2019b), earthquake loads (e.g., Cheng et al 2019), and vehicle loads (e.g., Zhou et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Parametric analysis of the dynamic characteristics of a long-span three-tower self-anchored suspension bridge with a composite girder

Shao

Chen

2020

ABEN

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Three-tower self-anchored suspension bridge (TSSB) is more and more favored because of its beautiful structure and strong adaptability to terrain and geological conditions. However, there are few engineering practices and related researches on super long-span three-tower self-anchored suspension bridges. A three-dimensional finite element model for the Fenghuang Yellow River Bridge, with the world’s longest span of its kind under construction, is established using the ANSYS finite element program, and the structural dynamic characteristics of the super long-span TSSB are studied and compared with those of several bridges of the same type or with similar spans. In addition, the influence of the key design parameters such as the stiffening girder stiffness, tower stiffness, main cable and suspender stiffness, central buckle, and longitudinal constraint system on the dynamic characteristics of the structure is analyzed. The results show that the first mode of the TSSB is longitudinal floating, the lower-order modes are dominated by vertical bending modes, while the higher-order modes are primarily vibration modes of the main cables, and the torsional modes exhibit strong coupling with the lateral sway of the towers and main cables. The frequency of the first antisymmetric vertical bending mode of the TSSB has an inversely proportional relationship with the main span length. Compared with a double-tower ground-anchored suspension bridge and cable-stayed bridge with similar spans, the TSSB has the lowest frequency for the first antisymmetric vertical bending mode and the highest frequency for the first symmetric vertical bending mode, with a more pronounced coupling with the towers and main cables in the torsional modes. Analysis of the structural parameters shows that the frequencies of the longitudinal floating mode, first antisymmetric vertical bending mode, first symmetric vertical bending mode, and first torsional mode are most sensitive to the longitudinal bending stiffness of the side tower, central buckle, vertical bending stiffness of the stiffening girder, and torsional stiffness of the stiffening girder, respectively. The research findings and relevant conclusions can provide basic data for response analysis of long-span TSSBs under dynamic loads and offer an engineering reference for the design of similar bridges around the world.

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Process-independent construction stage analysis of self-anchored suspension bridges

Cited by 34 publications

References 35 publications

Nonlinear Stress-Free-State Forward Analysis Method of Long-Span Cable-Stayed Bridges Constructed in Stages

Nonlinear Stress-Free-State Forward Analysis Method of Long-Span Cable-Stayed Bridges Constructed in Stages

Mechanical Performance Analysis and Parametric Study of a Self‐Anchored Suspension Bridge with Ultra‐Wide Double‐Sided Steel Box Girder

Parametric analysis of the dynamic characteristics of a long-span three-tower self-anchored suspension bridge with a composite girder

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