Comparative study on seismic vulnerability of RC bridge piers reinforced with normal and high-strength steel bars

Su, Junsheng; Li, Zhongxian; Dhakal, Rajesh; Li, Chao; Wang, Fangbo

doi:10.1016/j.istruc.2020.12.048

Cited by 24 publications

(3 citation statements)

References 57 publications

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“…According to previous research, four engineering demand parameters of piers were used for the seismic demand analysis of 3# pier [35][36][37][38]. e displacement of the pier-top (u), the curvature of the pier-bottom (κb), and pier-top (κt) and the strain in the longitudinal steel bar (ε) of the piers were selected.…”

Section: Preliminary Selection Of Ims and Edpsmentioning

confidence: 99%

A Seismic Demand Model for Bridges Based on IM and EDP Parameter Matching and Bidirectional Optimization

Shuai

Song

2021

Shock and Vibration

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The accuracy of seismic demand models in seismic vulnerability analysis of structures or components mainly depends on the seismic intensity measures (IMs) and engineering demand parameters (EDPs). This paper proposes a novel method to obtain the optimal seismic demand model for the seismic vulnerability analysis of bridges. The method obtains the IM-EDP combination by matching all IMs and EDPs within a wide range one by one, considering the contribution of multiple IM parameters to the seismic response of the structure and avoiding the blindness of EDP selection. The IM is determined by calculating Pearson correlation coefficient and partial correlation coefficient, controlling the correlation between EDP and IM (or IMs) to a minimum to reduce the multicollinearity within the vector IMs and avoid ill-conditioned models. The optimal seismic demand model is obtained by inspecting the scatter plot and residual plot of suboptimal seismic demand models determined from all combinations by guaranteeing efficiency and sufficiency. The efficiency of seismic demand models is guaranteed by controlling the root mean square error (RMSE) and the coefficient of determination (R2). The sufficiency of models is guaranteed by controlling the slope of fitted line. A continuous rigid frame bridge with double thin-walled piers is used as a case study and a dynamic time-history analysis is performed to obtain the seismic vulnerability of bridge with the proposed method. The results show that the proposed method is feasible and ideally suited for optimizing seismic demand model.

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Section: Preliminary Selection Of Ims and Edpsmentioning

confidence: 99%

A Seismic Demand Model for Bridges Based on IM and EDP Parameter Matching and Bidirectional Optimization

Shuai

Song

2021

Shock and Vibration

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show abstract

Section: Introductionmentioning

confidence: 99%

“…Todorov and Billah (2021) studied the influence of long duration and near-fault ground motion on the seismic performance of bridge piers and compared it with short duration and far-field motion. Su et al (2021) evaluated the effects of high-strength steel bars (HSSB) on seismic performance of RC piers by comparing that with normal steel bars through fragility analysis. Xiang et al (2020) proposed a new type of SMA (strong memory alloys)-steel coupling strengthening scheme for concrete piers, and analyzed the seismic fragility of the bridges strengthened with pure steel, SMA-steel coupling reinforcement, and pure SMA steel, respectively.…”

Section: Introductionmentioning

confidence: 99%

Analysis of time-varying seismic fragility of rigid frame pier of offshore bridge

Liang

Wei

et al. 2022

IJSI

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PurposeAlthough mechanical behavior of rigid frame pier has been clearly recognized, their time-varying seismic performance are yet to be well characterized due to some offshore piers that are eroded by chloride ion and located in earthquake-prone area. In this study, the time-variant seismic fragility analysis was conducted to evaluate seismic performance of rigid frame pier under four damage states with considering the time-varying characteristics of the material.Design/methodology/approachThis paper establishes the nonlinear finite element model for the investigated offshore reinforcement concrete (RC) pier with considering the time-varying durability damage of the materials and defines the damage state, damage position and damaged index of the offshore RC pier. It also analyzes the time-varying seismic fragility of the offshore RC pier by using the capacity demand ratio method in the whole life cycle.FindingsThe results show that chloride induced corrosion has a significant effect on the rigid frame pier and bending capacity of top section is less than that of bottom section. The rate of decline accelerates after the service life reaching 30 years under the coupling of the earthquake and the environmental erosion. In the early years of service, the seismic fragility of the structure changed slowly.Originality/valueThis paper analyzes the influencing factors of seismic performance of rigid structure pier, and analyzes the seismic capacity and seismic performance of rigid structure pier under different service periods.

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Experimental study of high-strength steel fiber concrete exterior beam-column joints with high-strength steel reinforcements

Zhang

Zhao

Rong

et al. 2023

Bull Earthquake Eng

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Comparative study on seismic vulnerability of RC bridge piers reinforced with normal and high-strength steel bars

Cited by 24 publications

References 57 publications

A Seismic Demand Model for Bridges Based on IM and EDP Parameter Matching and Bidirectional Optimization

A Seismic Demand Model for Bridges Based on IM and EDP Parameter Matching and Bidirectional Optimization

Analysis of time-varying seismic fragility of rigid frame pier of offshore bridge

Experimental study of high-strength steel fiber concrete exterior beam-column joints with high-strength steel reinforcements

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