IDENTIFICATION OF NONLINEAR STRUCTURAL PARAMETERS WITH LIMITED INPUT AND OUTPUT MEASUREMENTS
In this paper,a technique is proposed for the identification of nonlinear structural parameters with limited input and output measurements. The identification algorithm is based on the sequential application of extended Kalman estimator for the nonlinear structural parameters and the recursive least square estimation for the unmeasured excitation. First,the identification of small size nonlinear structural parameters is studied. Then,the technique is extended to identify large size nonlinear structural parameters utilizing substructure approach. Interaction effect between adjacent substructures is accounted by considering the interaction forces at substructure interfaces as additional unknown inputs to the substructures. Two numerical examples which identify nonlinear hysteretic parameters of a 4-story and a 7-story hysteretic shear-frame building subject to unmeasured ground excitation respectively,demonstrate the efficiency of the proposed technique.
Nonlinear system System identification Kalman estimator Substructure approach
Ying Lei Yan Wu Tao Li
Department of Civil Engineering,Xiamen University,Xiamen 361005,P. R.China Department of Civil Engineering,Xiamen University,Xiamen 361005,P. R. China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
1369-1374
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）