巨型框架多功能减振结构的有限元计算方法  

FINITE ELEMENT ANALYSIS OF MULTI-FUNCTIONAL VIBRATION-ABSORPTION MEGA-FRAMES

作　　者：田玉基[1] 蓝宗建[2] 杨庆山[1] 

机构地区：[1]北方交通大学土木建筑工程学院,北京100044 [2]东南大学土木工程学院,南京210096

出　　处：《工程力学》2004年第3期118-122,共5页Engineering Mechanics

基　　金：国家自然科学基金资助项目(59778040)

摘　　要：巨型框架多功能减振结构的结构复杂、规模庞大,并且它是由具有不同阻尼特性的材料组成的。因此,采用有限元方法进行计算时面临着一系列问题需要解决。针对巨型框架多功能减振结构的受力特性,给出了巨型框架多功能减振结构的三维简化计算模型,大大缩减了计算自由度。由于隔震橡胶垫的变形主要是水平剪切变形,因此,将隔震橡胶垫看做具有阻尼特性的三维弹性或弹塑性铰,并提出了隔震橡胶垫单元的三维单元模型。由于巨型框架多功能减振结构的非经典阻尼特性,可以采用子结构技术对巨型框架多功能减振结构进行有限元建模、计算。The multifunctional vibration-absorption megaframe structures, which are composed of parts with different damping coefficients, are complicated and large-scale systems. Problems arise when the finite element method is adopted to analyze the systems. Considering the performance of the system under dynamic loads, a simplified three-dimensional finite element model, in which the degrees of freedom were condensed, was presented. The main deformation of the laminated rubber bearings (LRBs) was the horizontal shear deformation; therefore a LRB was regarded as a three-dimensional elastic or elastoplastic hinge with damping character and a three-dimensional finite element model of the LRB was presented. The substructure technique was adopted to analyze the multifunctional vibration-absorption megaframe structures.

关 键 词：巨型框架 结构控制 有限元方法 橡胶垫单元 子结构建模 

分 类 号：TU352.1[建筑科学—结构工程]