利用曲率模态识别桥梁损伤的研究  

Bridge damage identification using curvature mode shapes

作　　者：刘义伦[1] 时圣鹏[1] 廖伟[1] 

机构地区：[1]中南大学机电工程学院,长沙410083

出　　处：《振动与冲击》2011年第8期77-81,96,共6页Journal of Vibration and Shock

摘　　要：针对在利用曲率模态识别桥梁损伤过程中遇到的一些问题,得出了适用于桥梁损伤识别的曲率振型计算公式;提出了曲率振型规范化处理方法,以便于识别结构损伤程度;对曲率零点处的变化量计算作了特殊处理,以避免此处引起的损伤识别干扰;并给出了传感器足够密集时的损伤程度估计公式,最后通过数值仿真验证了上述方法的有效性。In response to the problems that are encountered in the process of bridge damage identification using curvature mode shapes, a formula suitable for obtaining curvature mode shapes was presented; curvature mode shapes normalization was proposed in order to detect the severity of damage easily; curvature mode variations at the zero curvature points were calculated specially in order to avoid the damage identification interference at those points; and a formula for the estimation of damage degree with enough density of sensors was given. Numerical simulations verified the effectiveness of the method proposed.

关 键 词：曲率模态 规范化 曲率零点 损伤程度 

分 类 号：TU317[建筑科学—结构工程]