Selection method of optimal EDPs for post-earthquake vertical load-carrying capacity of RC bridge piers

被引：0
|
作者：
Dong H. [1 ]
Ma R. [1 ]
Han Q. [1 ]
Du X. [1 ]
机构：
[1] National Key Laboratory of Bridge Safety and Resilience, Beijing University of Technology, Beijing
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2024年 / 57卷 / 04期
关键词：
bridge piers; damage level; loss of the vertical load-carrying capacity; optimal EDP; post-earthquake traffic flow capacity; residual drift ratio;
D O I：
10.15951/j.tmgcxb.23030154
中图分类号：
学科分类号：
摘要：
The post-earthquake vertical load-carrying capacity is an important indicator reflecting the traffic flow capacity of a girder bridge after an earthquake. However, it is difficult to quantify the indicator in the post-earthquake. To rapidly assess the traffic flow capacity of a bridge, the optimal engineering demand parameter ( EDP ) for post-earthquake vertical load-carrying capacity assessment is comprehensively investigated in this work. Five EDPs related to the residual drift and the damage level of bridge piers are first selected. Subsequently, nonlinear time-history analysis and pushover analysis are performed for RC bridge piers considering the material uncertainty to obtain the EDPs. On this basis, the post-earthquake vertical load-carrying capacity for RC bridge piers with residual drift and damage is obtained by pushdown analyses. The normal cumulative function in the In (x) -y coordinate system is determined as the optimal model, through regression analysis. Based on the performance criteria of the optimal EDP, an assessment on the optimal EDP of post-earthquake vertical load-carrying capacity is conducted. The findings are as follows:(1) The optimal EDP is the maximum drift ratio when the measurability is not considered.(2) The residual drift ratio is determined as the optimal EDP if the measurability is taken into account. ( 3 ) Taking into account the effect of aftershocks, the modified Park-Ang damage index is the optimal EDP. The correlation between the bridge functionality and seismic performance can be established by the optimal EDP, and the optimal EDP can provide references for further development and improvement of the seismic resilience assessment and the seismic design of bridges. © 2024 Chinese Society of Civil Engineering. All rights reserved.
引用
收藏
页码：59 / 70
页数：11
相关论文
共 36 条
  • [1] Liu Yongjian, Gao Yimin, Zhou Xuhong, Et al., Technical and economic analysis in steel-concrete composite girder bridges with small and medium span, China Journal of Highway and Transport, 30, 3, pp. 1-13, (2017)
  • [2] Jara J M, Lopez M G, Olmos B A, Et al., Engineering demand functions for RC medium length span bridges [J], Bulletin of Earthquake Engineering, 13, 2, pp. 679-702, (2015)
  • [3] Han Q, Du X L, Liu J B, Et al., Seismic damage of highway bridges during the 2008 Wenchuan earthquake, Earthquake Engineering and Engineering Vibration, 8, 2, pp. 263-273, (2009)
  • [4] Kawashima K, Unjoh S., Impact of hanshin/awaji earthquake on seismic design and seismic strengthening of highway bridges [J], Doboku Gakkai Ronbunshu, 1997, 556, pp. 1-30, (1997)
  • [5] Fang C, Liang D, Zheng Y E, Et al., Seismic performance of bridges with novel SMA cable-restrained high damping rubber bearings against near-fault ground motions [J], Earthquake Engineering & Structural Dynamics, 51, 1, pp. 44-65, (2022)
  • [6] Rahmzadeh A, Tremblay R, Alam M S., Finite-element simulation of the lateral response of posttensioned base rocking steel bridge piers, Journal of Structural Engineering, 148, 9, (2022)
  • [7] Zeng J J, Liang S D, Zhuge Y, Et al., Seismic behavior of FRP-concrete-steel double skin tubular columns with a rib-stiffened Q690 steel tube and high-strength concrete, Thin-Walled Structures, 175, (2022)
  • [8] Ghasemi S H, Lee J Y., Reliability-based indicator for post-earthquake traffic flow capacity of a highway bridge, Structural Safety, 89, (2021)
  • [9] Mackie K R, Stojadinovic B., Post-earthquake functionality of highway overpass bridges, Earthquake Engineering & Structural Dynamics, 35, 1, pp. 77-93, (2006)
  • [10] Zheng Y, Dong Y, Li Y H., Resilience and life-cycle performance of smart bridges with shape memory alloy ( SMA ) -cable-based bearings, Construction and Building Materials, 158, pp. 389-400, (2018)
1234