分阶段结构损伤诊断方法  

Step-by-step Method of Structural Damage Diagnosis

作　　者：李文雄[1] 陈存恩[1] 

机构地区：[1]华南农业大学水利与土木工程学院,广州510642

出　　处：《土木建筑与环境工程》2011年第6期84-89,共6页Journal of Civil,Architectural & Environment Engineering

摘　　要：在现有分步损伤诊断方法的基础上,提出了一种3阶段结构损伤诊断方法。通过对遗传算法的特点进行分析,提出以逐步评定并排除无损单元的思路来处理结构损伤诊断问题。提出的分步方法中,应用了多次灵敏度遗传算法计算来进行无损单元排除,同时结合残余力向量指标对损伤大致位置进行判断。算例证明,在单纯用1种方法难以完成损伤诊断的情况下,用分步处理的方法能得到很好的效果,同时表明了多次灵敏度遗传算法计算是逐步排除无损单元的有效途径。Base on the existing step-by-step structural damage diagnosis method,a three-step structural damage diagnosis method is developed.According to the analysis of the characteristic of genetic algorithm,a new idea of excluding the undamaged element by means of step-by-step evaluation is developed to deal with the damage diagnosis problem.In this method,sensitivity genetic algorithm is used to exclude the undamaged element step by step and residual force method is used to fix the damage district.According to the simulation research of a 2D framed structure,it is shown that the step-by-step structural damage diagnosis method can gain the ideal results when it＇s difficult for a single damage diagnosis method to get the good results.It is also indicated that sensitivity genetic algorithm is a good way to exclude the undamaged element step by step.

关 键 词：损伤 分阶段诊断方法 遗传算法 残余力向量 

分 类 号：TU312.3[建筑科学—结构工程]