|本期目录/Table of Contents|

[1]俎 林,黄 勇.维修加固桥梁的抗震韧性评价方法*[J].地震研究,2020,43(03):522-530.
　ZU Lin,HUANG Yong.Evaluation Method for Seismic Resilience of Maintenance Bridges[J].Journal of Seismological Research,2020,43(03):522-530.
点击复制

维修加固桥梁的抗震韧性评价方法*(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
43
期数:
2020年03期
页码:
522-530
栏目:
出版日期:
2020-09-14

文章信息/Info

Title:
Evaluation Method for Seismic Resilience of Maintenance Bridges
作者:
俎 林; 黄 勇
(中国地震局工程力学研究所 地震工程与工程振动重点实验室,黑龙江 哈尔滨 150080)
Author(s):
ZU Lin; HUANG Yong
(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Adiministration Harbin 150080,Heilongjiang,China)
关键词:
桥梁易损性;  跨中挠度;  损伤指标;  连续梁桥;  增量动力分析
Keywords:
bridge vulnerability;  mid-span deflection;  damage index;  continuous beam bridge;  incremental dynamic analysis
分类号:
U445; TU352
DOI:
-
摘要:
以《公路桥梁技术状况评定标准》(JTG/T H21—2011)中的跨中挠度限度为损伤指标来进行主梁的易损性分析,提出了一种针对维修加固桥梁的抗震韧性评价方法。以一座在多年运营发生破坏后进行过主梁维修加固的五跨连续梁桥为例,采用有限元建模和模型修正的方法,利用增量动力分析,研究了维修加固前后桥梁的主梁构件在不同强度地震作用下易损性的变化; 利用经验统计方法探讨了既有桥梁弹性模量与跨中挠度的关系,提出了基于跨中挠度的功能损失函数; 结合案例桥梁具体维修加固工法,初步建立了恢复函数曲线,计算了维修加固前后桥梁的抗震韧性指标。分析结果表明:针对维修加固桥梁,利用跨中挠度作为损伤指标进行抗震韧性评估是可行的,从易损性曲线可以得到维修加固对于抗震性能的提升是较为明显的; 维修加固对于韧性提升是随着破坏等级的提升递减的,对轻微破坏较为明显,至结构失效时则差异较小。
Abstract:
This paper uses the mid-span deflection limit in the “Highway Bridge Technical Condition Assessment Standard(JTG / T H21-2011)” as the damage index to analyze the vulnerability of the main girder,and proposes an evaluation method for the seismic resilience of repaired bridges.Taking a five-span continuous girder bridge that has been repaired and strengthened as the main girder after years of operational damage,using finite element modeling and model modification methods,20 sets of seismic waves were selected using incremental dynamic analysis(IDA).Changes in the vulnerability of the bridge's main beam members before and after maintenance and reinforcement under earthquakes with different intensities; the relationship between the time-varying elastic modulus of the existing bridge and the mid-span deflection was explored using empirical statistical methods,and a functional loss based on mid-span deflection was proposed function; Combined with the case bridge specific repair and reinforcement construction method,a preliminary recovery function curve is proposed; on this basis,the seismic resilience index of the case bridge before and after repair reinforcement is calculated.The analysis results show that it is feasible to use the mid-span deflection as the damage index to evaluate the seismic resilience for the maintenance and strengthening of the bridge.From the vulnerability curve,it can be obtained that the maintenance and reinforcement is more obvious for the improvement of the seismic performance.Resilience decreases with the increase of the damage level,which is more obvious for minor damage and the difference in structural failure is small.

参考文献/References:

-

备注/Memo

备注/Memo:
收稿日期:2020-03-31
基金项目:中央公益事业基本科研业务专项基金项目(2018QJGJ06,2018A02)和国家重点研发计划项目(2018YFC1504602)联合资助.
通讯作者:黄勇(1969-),副研究员.主要从事桥梁抗震及结构健康监测方面的工作.E-mail:huangyong@iem.ac.cn

更新日期/Last Update: 2020-09-18