梁式结构损伤诊断应变模态理论研究与仿真分析

运行中的建筑结构的损伤诊断方法是目前工程界关注的热点问题之一。分析了位移模态、应变模态与曲率模态3者之间的关系,以一混凝土悬臂梁为研究对象,用ANSYS有限元软件,建立了仿真模型,通过对不同损伤位置和不同损伤程度工况的模拟,进行结构损伤辨识研究,旨在通过结构损伤前后的位移模态和应变模态的振型比较,揭示应变模态在结构损伤诊断中的规律,为使用中的大型建筑结构损伤诊断研究提供理论借以参考。

Theory Research and Simulation Analysis of Beam Structure Strain Mode Damage Diagnosis

Damage diagnosis method of building structure under operation is one of the hot issues in engineering currently.The relations of displacement modal,strain modal and curvature modal is expounded.With a concrete cantilever beam as the research object,the finite element model of cantilever beam is established by means of ANSYS.Through the simulation of damage cases under different damage location and damage degree,structural damage identification is studied.The aim of the work is to reveal the rule of strain modal in structural damage detection through the comparison between displacement modal modes and strain modal modes,and then to provide the theoretical basis for damage diagnostic study of large building structures under operation.