集中剪切型系统的层间参数识别法  

A Building-Structure Parameter Identification Method with Less Stringent Requirements for Initial Parameters

作　　者：刘增荣[1] 邵江[2] 

机构地区：[1]西北工业大学土木工程系,陕西西安710072 [2]长安大学地质工程系,陕西西安710064

出　　处：《西北工业大学学报》2001年第4期552-556,共5页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金 (5 99780 38)

摘　　要：提出了一种集中剪切型系统的层间参数识别法。对于层状地基 -基础 -框架这一集中剪切型系统 ,将层间刚度和阻尼从总体系统中分离出来 ,依据最小二乘识别法则 ,导出了层间刚度和阻尼这些层间参数识别的递推方程 ,以此为基础建立了该系统的层间参数识别方法。并以人工模拟系统输入和输出的方法 ,对一位于三层粘性土上的框架结构系统 ,实施了参数识别的全过程。结果表明 ,所建立的系统参数识别方法 ,对识别初始值的要求较低 ,且具有良好的识别精度。Kalman-filter parameter identification method usually imposes stringent requirements on initial values of parameters of building structure. We present a lumped-shear system (the layered soil-foundation-frame) parameter identification method. Paying due attention to the characteristic of the lumped-shear system, we decompose the building structure, including the soil foundation, into stories of building and layers of soil, and deduce the asymptotic identification equation of story (layer) stiffnesses and dampings by the least squares method. We give a numerical example of five-story structure and three-layer cohesive soil foundation; we implement the parameter identification process with the artificially generated input and output. The results show preliminarily that our method does give good estimation without imposing very stringent requirements on initial values of parameters.

关 键 词：集中剪切型系统 层间刚度 阻尼 层间参数识别 建筑结构系统 地基基础 土 

分 类 号：TU311.3[建筑科学—结构工程] TU43