Research on physical parameter damage identification of chimney structure under excitation response of earthquake
Liming Wu1, Zijian Wang2, 3
COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12D) 260-264
1 Chongqing Technology and Business Institute, Chongqing, China, 400052
2 Chongqing University of Science&Technology, Chongqing, China, 401331
3 T.Y.Lin International Engineering Consulting (China) Co., Ltd, Chongqing 401121
When seismic load affects structure height direction, it presents time domain correlation feature. According to this feature and on the basis of utilizing total compensation composite inversion algorithm, establish physical parameter damage identification method combining with probability average method in which seismic excitation response is unknown. Taking one typical chimney as engineering background, input stability and accuracy of analysis algorithm under the action of unknown EI seismic wave and do discussion on antijamming capability under low-level noise. Research results show that parameter damage identification of structure without noise jamming keeps high accuracy and stability. Damping has sensitive response on noise jamming in which error amplitude of damping identification obviously enlarges with the increasing of noise level. Meanwhile its accuracy and stability reduce. Response of stiffness on the change of noise level is relatively low and its stability and accuracy are higher. Therefore, research results would provide references for seismic damage and health monitoring method of chimney structure.