结构损伤识别中小波基函数的选择  

THE SELECTION OF WAVELET BASE FUNCTION ON STRUCTURE DAMAGE DETECTION

作　　者：蒋庆[1] 叶献国[1] 连星[2] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]安徽省工程咨询研究院,合肥230001

出　　处：《工业建筑》2011年第7期12-15,共4页Industrial Construction

基　　金：国家自然科学基金项目(90715016;50908071);建设部科学技术项目计划(2008-K3-2)

摘　　要：基于小波变换损伤指标不仅可以反映试件不同加载阶段的损伤程度,还可以为判断结构何时屈服提供一定的依据。小波基函数的选用是该损伤指标应用的一大难点。通过枚举法挑选合适的小波基函数及分解层数,并用此对两种不同边缘约束措施的叠合板式剪力墙和两种普通剪力墙进行了分析,计算结果与试验结果吻合良好,表明该方法是可靠的。A damage index based on wavelet transform could not only represent the damage extent at every load stage,but also be referred to judge when the structure was yielded.The selection of wavelet base function was the difficulty in use of the damage index.The appropriate wavelet base function was selected.This seismic damage model for four superimposed slab shear walls with edge restricted measures of two different forms and two general shear walls were analyzed.The calculating results and the experimental phenomenon were in good agreement.The experiment results showed that the method was reasonable and reliable.

关 键 词：小波变换 多分辨率分析 小波基函数 叠合板式剪力墙 

分 类 号：TU312.3[建筑科学—结构工程]