Identification of flexible buildings with bending deformation and the unmeasured earthquake ground motion  

作　　者：LEI Ying HE MingYu LAI ZhiLu LIN ShuZhi 

机构地区：[1]Department of Civil Engineering, Xiamen University [2]State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University [3]Department of Civil and Environmental Engineering,Rice University [4]Xiamen Construction and Management Bureau

出　　处：《Science China(Technological Sciences)》2015年第3期454-461,共8页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51178406);the State Key Laboratory for Disaster Reduction in Civil Engineering at Tongji University(Grant No.SLDRCE10-MB-01)

摘　　要：It is important to explore efficient algorithms for the identification of both structural parameters and unmeasured earthquake ground motion.Recently,the authors proposed an algorithm for the identification of shear-type buildings and unknown earthquake excitation.In this paper,it is extended to the investigation of the identification of flexible buildings with bending deformation and the unmeasured earthquake ground motion.In the absolute co-ordinate system,the unmeasured ground motion can be treated as an unknown translational force and a bending moment at the 1st floor level of a flexible building.Structural unknown parameters above the 1st story of the building can be identified by the extended Kalman estimator and the 1st story stiffness and the unmeasured ground motion are subsequently estimated based on the least-squares estimation.The proposed algorithm is further extended to the identification of tall bending-type buildings based on substructure approach.Inter-connection effect between sub-buildings is treated as‘additional unknown inputs’to sub-buildings,which are estimated by the extended Kalman estimator without the measurements of rotational responses.Numerical examples demonstrate the identification of a multi-story,tall bending-type building and its unmeasured earthquake ground motions using only partial measurements of structural absolute responses.

关 键 词：flexible building bending deformation structural identification unknown ground motion extended Kalman estimator substructure approach 

分 类 号：TU317[建筑科学—结构工程]