Theoretical study on the seismic response of a continuous beam bridge with safe-belt devices

Tan, Yuqing; Fang, Rong; Zhang, Wenxue; Zhao, Huimin; Du, Xiuli

doi:10.1016/j.soildyn.2021.106948

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…However, the above studies mainly focused on the seismic vulnerability of completed bridges. The research on continuous girder bridges under construction mainly stays at the level of structural seismic response analysis [7][8][9], and there are few reports on structural damage assessment during the construction stage. Hsu et al [10] proposed a construction classification and vulnerability analysis framework for existing buildings from the perspective of earthquake insurance.…”

Section: Introductionmentioning

confidence: 99%

Seismic Vulnerability Analysis of Long-Span Prestressed Concrete Composite Box Girder Bridge with Corrugated Steel Webs under Construction

Wang¹,

Hao³

et al. 2023

Buildings

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In order to address the difficulty in determining the seismic damage probability of continuous girder bridges under construction, the seismic vulnerability analysis method of the construction state is proposed in this study. Firstly, taking a long-span prestressed concrete composite box girder bridge with corrugated steel webs (OSW) as an example, the finite element models (FEMs) of dynamic calculation in different phases of cantilever construction are simulated by OpenSEES. Secondly, by selecting reasonable seismic waves and seismic intensity measures, the non-linear time-history analysis is carried out, followed by the demand parameters and damage indexes suitable for the construction state proposed. Finally, the probabilistic seismic demand model (PSDA) of the continuous box girder bridge during the construction stage is constructed by using the “cloud method”, and the seismic vulnerability curves of the piers and temporary bearings are established to evaluate the seismic performance during the construction stage. The results indicate that the damage probability of piers and temporary bearings increases with the progress of construction. The initial formation of the cantilever structure and the sudden change in the size of the construction segmental girder correspond to a high probability of damage, and seismic protection measures should be strengthened during this construction state. Moreover, significantly higher damage probability of the components under construction compared to the completed bridge after it is built.

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Section: Introductionmentioning

confidence: 99%

Seismic Vulnerability Analysis of Long-Span Prestressed Concrete Composite Box Girder Bridge with Corrugated Steel Webs under Construction

Wang¹,

Hao³

et al. 2023

Buildings

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“…Recently, different researches have been conducted to examine the impact of implementing different types of damping systems in the bridge to control the bridge movement under applied loads [6,7]. Numerical simulations and experimental testing have widely been performed on restrainers, dampers and bridges equipped with these devices [8][9][10]. The results revealed that utilizing the bridge with supplementary damping system is resulting to improve the bridges performance during seismic excitation [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Development of adjustable variable stiffness restrainer for bridge subjected to seismic excitation

Hamzah

Hejazi

2023

PLoS ONE

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This paper presents a numerical and experimental assessment of a developed adjustable variable stiffness restrainer (AVSR) utilized for short span bridges. This restrainer has the ability to demonstrate multi stiffness capacity in different stages of bridge’s superstructure movement to mitigate the severe damage of bridge due to an earthquake. The multi-level stiffness behavior of developed AVSR is achieved by using multiple mechanical springs with different lengths and placed in parallel in proposed design. A small prototype of developed AVSR has been fabricated and tested under incremental and cyclic loading in order to assess the restrainer performance and the behavior has been validated using finite element analysis. Thereafter, the constitutive model of AVSR was derived for the proposed restrainer in order to implement it in numerical simulations. Furthermore, a parametric study has been conducted numerically to evaluate the effectiveness of different parameters on the restrainer capacity. Moreover, the efficiency of AVSR application in a single degree of freedom system has been assessed by performing seismic analysis on a frame equipped with AVSR subjected to different seismic excitations using Newmarkʼs method. The experimental and finite element results proved the efficiency of developed variable stiffness device to exhibit adjustable action against imposed loads in three designed stages. Furthermore, the parametric study results revealed that increasing the section area of the spring wire leads to increase the restrainer capacity. In contrast, the restrainer resistance is declined by an increase in the mean spring diameter and number of coils for each spring of AVSR. The time history analysis results also indicated that the frame response in terms of displacement, velocity and acceleration is improved by implementing the AVSR in the considered system.

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Multi-level fortification strategies for double-tower cable-stayed bridges with safe-belt devices

Liu,

Zhang,

Chen

et al. 2024

Structures

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Theoretical study on the seismic response of a continuous beam bridge with safe-belt devices

Cited by 4 publications

References 16 publications

Seismic Vulnerability Analysis of Long-Span Prestressed Concrete Composite Box Girder Bridge with Corrugated Steel Webs under Construction

Seismic Vulnerability Analysis of Long-Span Prestressed Concrete Composite Box Girder Bridge with Corrugated Steel Webs under Construction

Development of adjustable variable stiffness restrainer for bridge subjected to seismic excitation

Multi-level fortification strategies for double-tower cable-stayed bridges with safe-belt devices

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