Seismic Responses of a Cable-Stayed Bridge with Consideration of Uniform Temperature Load

Guo, Junjun; Zhong, Jue; Dang, Xiaohong; Yuan, Wancheng

doi:10.3390/app6120408

Cited by 4 publications

(4 citation statements)

References 41 publications

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“…Xiang et al [13,14] studied the dynamic response of trains and bridges under emergency braking during earthquakes, as well as the safety of train operation. Zeng [15], Han [16], Guo [17], Variyavwala J.P. [18] and others used cable-stayed bridges as examples to study the coupling dynamic interaction between trains and cable-stayed bridges under earthquake action, and obtained valuable conclusions.…”

Section: Introductionmentioning

confidence: 99%

Influence of Variable Height of Piers on the Dynamic Characteristics of High-Speed Train–Track–Bridge Coupled Systems in Mountainous Areas

Zeng,

Jiang,

Zhang

et al. 2023

Applied Sciences

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With the increase in the occupancy ratio of bridges and the speed of trains, the probability of trains being located on bridges during earthquakes increases, and the risk of derailment increases. To investigate the influence of unequal-height piers on the dynamic response of high-speed railway train bridge systems, a seismic action model of high-speed train–track–bridge dynamic systems was established based on the in-house code using the finite element method and multi-body dynamics method. It is found that (1) compared to equal-height piers, the peak lateral dynamic response of unequal-height piers (with gradually increasing pier heights) decreases, while the peak vertical dynamic response increases; (2) the peak lateral dynamic response of unequal-height piers (with a steep increase in pier height) increases sharply, while the peak vertical dynamic response decreases; and (3) the safety indicators of equal-height piers are significantly superior to the two unequal-height pier operating conditions.

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Section: Introductionmentioning

confidence: 99%

Influence of Variable Height of Piers on the Dynamic Characteristics of High-Speed Train–Track–Bridge Coupled Systems in Mountainous Areas

Zeng,

Jiang,

Zhang

et al. 2023

Applied Sciences

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“…e half-floating system is widely used in the longitudinal direction (i.e., additional damping devices at the girder-tower connection). us, the seismic effect of this system depends on the deformation capacity as temperature rises and the sufficient displacement capacity at ground motions [1,2]. Over the past decade, many experimental tests were carried out to develop the constraints for long-span cable-stayed bridges in the longitudinal direction.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Mitigation of a Long‐Span Tower Bridge with Two Types of Constraint System

Gao

Zheng

et al. 2020

Advances in Civil Engineering

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The stress of the main tower of a cable-stayed bridge depends on the connection type between the tower and deck. In order to study the most suitable longitudinal damping mode for a long-span cable-stayed bridge. In this article, a nonlinear finite element model is established based on a large span concrete cable-stayed bridge with a main span of 680 m. Without considering the influence of the transverse constraint, the damping effect of the elastic connection device and the viscous damper is simulated when the longitudinal seismic load is input. The results show that the stiffness of the main beam is increased by installing the elastic connection device, so the longitudinal drift frequency of the main beam is increased, but the stiffness of the structure is not changed by installing the viscous damper. Both viscous dampers and elastic connection structures can reduce the longitudinal displacement of the beam end, but viscous dampers are more favorable for the stress of the main tower. In terms of damping effect, viscous dampers are more suitable for long-span cable-stayed bridges, but, in terms of economy and parameter control, elastic connection devices have more advantages.

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“…e collapse process and failure mechanism of rail-cum-road cable-stayed bridges have been studied under strong seismic excitations [15]. e effects of uniform temperature changes on the seismic responses of a cable-stayed bridge have also been discussed [16].…”

Section: Introductionmentioning

confidence: 99%

Optimisation of Longitudinal Seismic Energy Dissipation System for Straddle‐type Monorail‐Cum‐Road Long‐Span Cable‐Stayed Bridge

Liang

Liu

et al. 2019

Shock and Vibration

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To investigate the optimal longitudinal seismic energy dissipation system of straddle-type monorail-cum-road long-span cable-stayed bridges, the Niutianyang Bridge was selected as the engineering background, and the explicit time-domain dimension-reduced iteration method was adopted to carry out nonlinear time-history analysis. To consider the dynamic characteristics of longitudinal movable supports, the static and dynamic responses of four kinds of energy dissipation systems were studied, including longitudinal unconstrained, elastic cable, viscous damper, and speed lock-up devices. The damping effect of four types of schemes in which viscous dampers were installed at piers or towers was analysed, and the parameters of the viscous dampers were optimised. The influences of the straddle-type monorail train braking force and the running vibration of the straddle-type monorail traffic on the parameters of the viscous dampers were analysed. This study shows that the viscous damper system had the lowest bending moment at the bottom of the tower and a smaller displacement response, and the energy dissipation was the best. Each viscous damper had the highest energy dissipation efficiency when they are installed only at the main tower. The damping effect was better when the damping coefficient c ranged from 3500 to 5000 kN⋅m/s−α and the velocity exponent α ranged from 0.35 to 0.5. The static friction of the straddle-type monorail-cum-road long-span cable-stayed bridge support can resist the trains’ braking force, and the parameters of the viscous damper can be selected regardless of train braking. A suitably large value of velocity exponent α may be required to increase the working velocity of the viscous damper to reduce the damper’s participation in the process of the train crossing the bridge.

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Seismic Responses of a Cable-Stayed Bridge with Consideration of Uniform Temperature Load

Cited by 4 publications

References 41 publications

Influence of Variable Height of Piers on the Dynamic Characteristics of High-Speed Train–Track–Bridge Coupled Systems in Mountainous Areas

Influence of Variable Height of Piers on the Dynamic Characteristics of High-Speed Train–Track–Bridge Coupled Systems in Mountainous Areas

Seismic Response Mitigation of a Long‐Span Tower Bridge with Two Types of Constraint System

Optimisation of Longitudinal Seismic Energy Dissipation System for Straddle‐type Monorail‐Cum‐Road Long‐Span Cable‐Stayed Bridge

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