青马大桥桥板结构损伤位置识别的数值模拟

NUMERICAL STUDY OF DAMAGE LOCALIZATION FOR TSING MA BRIDGE DECK

通过数值模拟研究了香港青马大桥桥板结构的损伤位置识别问题。分两阶段来识别青马大桥桥板结构的损伤位置 ,在第一阶段 ,将青马大桥桥板结构划分为许多桥板段 ,并根据部分模态分量导出了一个损伤指标 ,用于指示大概的损伤区域 (桥板段 ) ;第二阶段 ,在已知损伤桥板段后 ,采用神经网络方法来识别具体的损伤构件。数值模拟结果表明 ,采用本文提出的损伤指标、采用神经网络方法 ,分两阶段进行青马大桥桥板结构的损伤位置识别是有可能的。

A damage localization for the Tsing Ma bridge deck is studied through a business program in the paper.A two-stage method is employed for the damage localization.In the first stage,the Tsing Ma bridge deck is divided into several segments.A damage index is derived from modal components for indicating the damaged region.That means to identify where is the damaged deck segment.In the second stage,the artificial neural network is used to identify damaged member in a damaged segment.The results show that the proposed method is feasible for the damage localization of a deck structure.