基底输入未知条件下质量不确定结构损伤识别

英文篇名：Damage identification for structures with mass uncertainty under unknown seismic input
中文刊名：大连理工大学学报
英文刊名：Journal of Dalian University of Technology
作者：陈健云 ; 王建有 ; 林皋
英文作者：CHENJian-yun~* ; WANGJian-you ; LINGao( School of Civil and Hydraul. Eng. ; Dalian Univ. of Technol. ; Dalian 116024 ; China )
中文关键词：复合反演 ; 时域损伤识别 ; 未知输入 ; 参数识别 ; 地震动反演
英文关键词：multiple inversion ; time domain damage identification ; unknown excitation ; parameter identification ; seismic inversion
出版日期：2005-04-10
机构：大连理工大学土木水利学院,大连理工大学土木水利学院,大连理工大学土木水利学院辽宁大连　116024 ,辽宁大连　116024 ,辽宁大连　116024
年：2005
期：02
出版单位：大连理工大学学报

摘要

针对结构各层有效质量和地震动输入均未知情况下的损伤识别问题,构造了不需要已知周围土壤、邻近结构和非结构构件影响的层间规格化刚度参数和阻尼参数,提出了一种新的逐层递推时域识别方法,给出了用规格化参数进行损伤识别的公式.为避免结构质量的影响,引入暂态影响参数和相关参数,并分析了质量误差对参数识别的影响.该方法利用测试数据时程直接进行结构损伤识别,并可反演出地震动时程.算例表明本方法切实可行.
A new time domain transferring method for damage identification of structures with mass uncertainty under unknown seismic input is developed, which can be applied to the damage identification of structures with unknown effects of surrounding soils, adjoining structures and unstructured components. The regularized stiffness and damping parameters are constructed and the corresponding damage identification formulae are derived in terms of regularized parameters. The temporary influence parameters and correlate parameters are introduced to avoid the effects of structural mass. The effects of mass uncertainty on damage identification are studied. Based on the proposed method, the structural damage can be directly identified from structure response and the seismic history can be obtained simultaneously. Numerical example indicates the accuracy and the effectiveness of the proposed method.

引文

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