Optimization of cable forces on concrete cable-stayed bridges including geometrical nonlinearities

Martins, Alberto; Simões, Luís; Negrão, João

doi:10.1016/j.compstruc.2015.02.032

Cited by 63 publications

(16 citation statements)

References 25 publications

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“…As is well known, whether a dynamic analysis or static analysis of cable-stayed bridges is conducted, nonlinear geometric effects must be taken into consideration, including the cable-sag effect, P-Δ effect, and large displacement effect [43]. The gravity-nonlinear static analysis should be conducted before dynamic analysis, because there would be large tension forces in the cables due to dead load, which would prevent the cables from becoming slack under seismic loads and influence the structural stiffness.…”

Section: Fe Model Validationmentioning

confidence: 99%

Practical Design Method of Yielding Steel Dampers in Concrete Cable-Stayed Bridges

Zeng

Cunyu

et al. 2019

Applied Sciences

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Restrained transversal tower/pier–girder connections of cable-stayed bridges may lead to high seismic demands for tower columns when subject to earthquake excitations; however, free transversal tower/pier–girder connections may cause large relative displacement. Using an energy dissipation system can effectively control the bending moment of tower columns and the relative tower/pier-girder displacement simultaneously, but repeated time history analyses are needed to determine reasonable design parameters, such as yield strength. In order to improve design efficiency, a practical design method is demanded. Therefore, the influence of yielding strength at different locations is studied by using comprehensive and parametric time history analyses at first. The results indicate that yielding steel dampers can significantly reduce the bending moment at tower columns and the relative pier–girder displacement due to the system switch mechanism during the vibration. Meanwhile, the yielding steel damper shows its general effect on reducing relative displacement between all piers/tower columns and the main girder as well, with only a localized effect on controlling seismic induced forces. Furthermore, a practical design method is proposed for engineering practices to determine key parameters of the yielding steel damper.

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Section: Fe Model Validationmentioning

confidence: 99%

Practical Design Method of Yielding Steel Dampers in Concrete Cable-Stayed Bridges

Zeng

Cunyu

et al. 2019

Applied Sciences

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“…Baldomir et al [16] described an optimization problem of cable crosssection of a cable-stayed bridge considering constraints of cable stress and deck displacement. Martins et al [17] used an entropy-based optimization algorithm to find the initial cable force of a concrete cable-stayed bridge. Dai and Wang [18] proposed an optimization calculation method to optimize the initial cable force of cable-stayed arch bridge in arch rib cantilever erecting.…”

Section: Introductionmentioning

confidence: 99%

Linear Control Method for Arch Ring of Oblique‐Stayed Buckle Cantilever Pouring Reinforced Concrete Arch Bridge

Liu

Zhou

et al. 2021

Advances in Civil Engineering

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Yelang Lake Bridge is the largest cantilevered single-chamber reinforced concrete arch bridge in China, with a net span of 210 m. In this article, an equation for positioning the height of the formwork before pouring of the arch ring segment was derived, which was suitable for the construction control of the long-span reinforced concrete arch bridge such as the Yelang Lake Bridge. The arch ring segment elevation calculation equation was derived under the two typical working conditions that the concrete pouring of the arch ring segment is completed and the buckle cable and anchor cable tensioning are completed. In addition, two typical working conditions of arch ring segment concrete pouring and cable tensioning were evaluated. Then, a new type of cradle and loading test of the cradle, which meet the requirements of the long segment pouring of the arch ring, were introduced. Finally, the measurement deviation during the construction of the arch segment was analyzed. The linear control results of the arch ring showed that the arch ring segment elevation calculation formula could effectively ensure the accuracy of the arch ring segment construction process under the two typical conditions of completion of concrete pouring of the arch ring segment and completion of the buckle and anchor cable tensioning. The maximum deviation is only 3.1 mm. The line shape after the completion of the arch ring construction was in good agreement with the target line shape, and the deviation between the measured value and the target value was only 2.5 cm, which met the engineering requirements.

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“…In recent years, researchers mainly focus on the calculation method of stay cable force adjustment in concrete cable-stayed bridges through the optimization theory [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Cable Force Adjustment in Cable‐Stayed Bridge considering the Number of Stay Cable Adjustment

Zhang

Sun

Wang

et al. 2020

Advances in Civil Engineering

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Modern cable-stayed bridges are spatial, multicable systems. The cable force needs to be adjusted during the construction phase and maintenance phase. The existing calculation methods of cable force adjustment mainly considered the rationality of structural force, but only few research studies have been conducted on how to reduce the number of stay cables which need to be adjusted. This study aims to propose an optimization calculation method including the optimization module with the sensitivity analysis and updating design variable module (UDVM), which are used for cable force adjustment in cable-stayed bridges. Based on the finite difference method, the sensitivity analysis is adopted in the optimization module, which can capture the response of structures as design variables vary; the particle swarm optimization method is adopted for structural optimization. The proposed method can dramatically reduce the number of stay cables which need to be adjusted and ensure the main girder stresses remain in a reasonable state during stay cable adjustment progress by UDVM. Moreover, the proposed method can continuously update the objective function, constraint conditions, and design variables. Finally, this proposed optimization calculation method is applied to two different cable-stayed bridges to validate the reliability and feasibility of the method.

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Optimization of cable forces on concrete cable-stayed bridges including geometrical nonlinearities

Cited by 63 publications

References 25 publications

Practical Design Method of Yielding Steel Dampers in Concrete Cable-Stayed Bridges

Practical Design Method of Yielding Steel Dampers in Concrete Cable-Stayed Bridges

Linear Control Method for Arch Ring of Oblique‐Stayed Buckle Cantilever Pouring Reinforced Concrete Arch Bridge

Optimization of Cable Force Adjustment in Cable‐Stayed Bridge considering the Number of Stay Cable Adjustment

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