[1]梁 岩,张卓航,班亚云,等.多跨连续梁-刚构桥地震易损性分析[J].郑州大学学报(工学版),2023,44(01):96-102.
 LIANG Y,ZHANG Z H,BAN Y Y,et al.Seismic Fragility Analysis of Multi-span Continuous Girder-rigid Frame Bridges[J].Journal of Zhengzhou University (Engineering Science),2023,44(01):96-102.
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多跨连续梁-刚构桥地震易损性分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
44
期数:
2023年01期
页码:
96-102
栏目:
出版日期:
2022-12-06

文章信息/Info

Title:
Seismic Fragility Analysis of Multi-span Continuous Girder-rigid Frame Bridges
作者:
梁 岩 张卓航 班亚云 王 艳
Author(s):
LIANG Y ZHANG Z H BAN Y Y et al.
文献标志码:
A
摘要:
为研究多跨连续梁-刚构桥地震易损性,本文基于OpenSEES平台,建立实际桥梁非线性地震反应分析模型,通过增量动力分析,建立不同桥墩、支座及桥台等桥梁构件易损性曲线,分析了全寿命周期内桥梁关键抗震构件桥墩的时变地震易损性,采用界限法估算桥梁结构系统的失效概率,研究算例桥梁的系统易损性。分析表明:在同一损伤状态下,1#与4#桥墩较易出现损伤,5#桥墩其次,2#和3#桥墩的概率最小,即墩高、材料强度及墩顶约束均会影响其易损性;桥台处支座相比于桥墩处支座,更易产生损伤;两桥台易损性曲线斜率较大,其发生同一损伤的概率无明显差别;全寿命周期内耐久性损伤后桥墩轻微损伤、中等损伤及严重破坏的超越概率显著增大,中等损伤状态下的超越概率,分别增大3.1%、11.3%、20.9%、29.1%、34.1%,严重损伤状态下,分别增大3.9%、13.5%、25.1%、33.4%、35.4%;桥梁系统易损性大于各构件,采用单个构件易损性来评估桥梁易损性会高估桥梁抗震性能。
Abstract:
In order to study the seismic vulnerability of multi-span continuous girder-rigid fr<x>ame bridges, ba<x>sed on OpenSEES platform, establishes a non-linear seismic response analysis model of the actual bridge. Through incremental dynamic analysis, vulnerability curves of bridge components such as piers, supports, and abutments are established, time-varying seismic vulnerability of piers of key anti-seismic components of bridges in the whole life cycle is analyzed, the failure probability of bridge structure system is estimated by boundary method, and system vulnerability of bridges is studied as an example. The analysis results show that: In the same damage state, 1# and 4# piers are more likely to be damaged, followed by 5# piers, and 2# and 3# piers have the least probability, the pier height, material strength and restraint of pier crest all affect its vulnerability. The bearing at abutment is more likely to cause damage than the bearing at pier the slope of the susceptibility curves of the two abutments is larger, and there is no significant difference in their probability of the same damage. The probability of slight, medium and serious damage of pier increases significantly after endurance damage in the whole life cycle, moderate damage state beyond the probability, respectively, increased by 3.1%, 11.3%, 20.9%, 29.1%, 34.1%, severe damage state, respectively, increased by 3.9%, 13.5%, 25.1%, 33.4%, 35.4%. Bridge systems are more fragile than individual components, using the vulnerability of a single component to evaluate the vulnerability of the bridge will overestimate the seismic performance of the bridge.
更新日期/Last Update: 2022-12-07