弯曲型支撑-框架弹塑性稳定的简化分析  

A SIMPLIFIED ANALYSIS ON ELASTIC PLASTIC STABILITY OF FLEXURAL BRACING-FRAME SYSTEM

作　　者：童根树[1] 俞一弓[1] 

机构地区：[1]浙江大学土木工程学系,浙江杭州310058

出　　处：《工程力学》2011年第1期186-191,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(50578140)

摘　　要：该文对框架-弯曲型支撑的双重抗侧力体系的稳定性,采用简化模型进行分析,其中核心筒被悬臂柱代替,框架被摇摆柱代替。通过这个模型承受水平力和竖向力各自单独和共同作用下的弹塑性稳定的分析,得到了对核心筒的刚度需求。这个规律表明,竖向力和水平力共同作用下的截面刚度需求,大于水平力对核心筒截面的需求和竖向力对核心筒截面刚度的需求之和。This paper presents an analysis of the elastic-plastic stability of frames braced by flexural bracings.Because of the inherent complexity of the problem,a simplified model is used in the present paper in which the frame is replaced by a leaning column and the flexural bracing is modeled as a vertical column.Horizontal forces and vertical loads are exerted on the system,and equations for determining the required cross-sectional rigidity of the cantilever columns are established.It is found that the required cross-sectional rigidity under combined actions of horizontal loads and vertical loads is greater than the summation of the required rigidities under horizontal loads and vertical loads separately.

关 键 词：双重抗侧力结构 稳定性 悬臂柱 框架 摇摆柱 

分 类 号：TU391[建筑科学—结构工程] TU311.2