子模型在高层建筑薄弱部位分析中的适应性研究  

Adaptability analysis of sub-model technique in the weak part of high-rise buildings

作　　者：何玉明[1,2] 龙渝川 

机构地区：[1]四川建筑职业技术学院,成都610399 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045

出　　处：《工程建设》2017年第10期22-27,共6页Engineering Construction

基　　金：国家自然科学基金资助项目(51578088)

摘　　要：研究了子模型技术在高层建筑薄弱部位有限元分析中的精确程度,提出用子模型技术实现复杂建筑精细有限元分析,阐述了子模型技术动力分析的原理及计算流程。以某40层带伸臂框架-核心筒结构为例,探讨伸臂桁架对结构动力响应的影响,对比了子模型在弹性及弹塑性时程分析中的计算精度。计算结果显示:子模型与全局模型动力弹性时程分析结果高度吻合,子模型技术能用于高层建筑地震反应分析;子模型的弹塑性时程分析能满足工程精度要求;采用子模型法能高效地模拟薄弱层(部位)的损伤破坏过程。The precision of sub-model technique in the finite element analysis of the weak part of high-rise buildings was studied, the method that finite element analysis based on sub-model technique be applied in analysis of high-rise buildings was proposed, and the principles and calculation process of dynamic analysis of sub-model tech- nique were expounded. Based on the example of a 40-story frame-tube structure with outriggers, the influence of the outriggers on dynamic response of the structure was studied, the calculation precisions of the sub-model were com- pared in elastic analysis and elastoplastic time-history analysis respectively. The result shows that the responses cal- culated by sub - model and whole-model are in close agreement, which indicates that sub-model technique can be used in high-rise buildings time -history analysis. It also shows that the elastoplastic time-history analysis response of sub-model technique can meet the precision requirenments, thus the technique could effectively simulates the damage progress of the weak parts .

关 键 词：高层建筑 加强层 子模型 动力响应 薄弱部位 弹塑性时程分析 

分 类 号：TU973.23[建筑科学—结构工程]