基于支座反力影响线的损伤指标及验证  

Damage Indices Based on Bearing Reaction Influence Line and Verification

作　　者：陈志为[1] 王轶泽 CHEN Zhi-wei;WANG Yi-ze(Department of Civil Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学土木工程系,厦门361005

出　　处：《武汉理工大学学报》2020年第1期29-35,共7页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(NSFC-51778550);厦门市科技局科技计划(3502Z20193020);厦门大学校长基金(20720180060)。

摘　　要：以两跨连续梁为例,推导了损伤前后支座反力影响线的理论表达式,构造了用于损伤识别的支座反力影响线指标。通过参数分析比较在不同损伤程度、损伤位置、支座测点的影响线指标损伤敏感性,最后通过两跨连续铝梁的实验室模型验证了支座反力影响线指标用于识别连续梁桥局部损伤的可行性。The influence line indices with excellent damage identification effect were constructed by deflection,strain,and rotation,but few studies systematically discussed the influence line indices of bearing reaction and verified their effects on damage identification.We took a two-span continuous beam as an example,the theoretical expressions of support reaction influence line before and after damage were derived,and then the support reaction influence line indices for damage detection were constructed.Considering different damage degrees,damage locations and bearing measuring points,the damage sensitivities of influence line indices were compared in parameter analysis study.Finally,the feasibility of the method was verified by using support reaction influence line indices to identify local damage exist in a laboratory model of two-span continuous aluminum beam.

关 键 词：支座反力 影响线 连续梁 损伤指标 实验验证 

分 类 号：U441[建筑科学—桥梁与隧道工程]