正常使用极限状态下半刚性连接组合梁框架侧移的简化计算  

A Simplified Method for Side Sway Analyze of Semi-rigid Composite Beam Frame under Serviceability Limit States

作　　者：刘清平[1] 李国强[1] 王静峰[2] 

机构地区：[1]同济大学,上海200092 [2]清华大学,北京100084

出　　处：《力学季刊》2008年第3期448-454,共7页Chinese Quarterly of Mechanics

基　　金：国家杰出青年科学基金项目(50225825)

摘　　要：对于无支撑半刚性连接框架而言,仅依靠梁柱本身的抗弯刚度为整个结构提供必需的水平抗侧移刚度,在满足正常使用要求的极限情况下,很有可能是框架的侧移控制设计而不是其承载力,为了充分理解半刚性连接组合梁框架在水平荷载下的侧移特性,本文采用等效刚度梁的概念,将半刚性连接的框架简化为等效的刚接框架,通过等效刚接框架与实际半刚性连接框架有限元分析结果的比较,表明采用等效刚接框架法能准确预测半刚性连接框架的侧移。半刚性连接组合梁框架中的有关参数对其侧移具有不同的影响,半刚性连接组合梁框架的侧移计算可用等效刚接框架进行简化计算,通过算例验证了建议的简化方法不仅可以使计算大大简化,而且具有工程设计可接受的精度。Flexural stiffness of beams and columns is the lateral displacement stiffness of semi-rigid frame structures without bracings. On serviceability limit states, the design of structures is likely to be determined by sidesway, not the bearing capacity. This paper is concerned with sway study on the behavior of the semi-rigid composite connections steel frameworks. According to the concept of the equivalent stiffness beams, the frames with semi-rigid connections were simplified to the equivalent rigid frames. The equivalent rigid frames and practical semi-rigid composite connections steel frameworks were analyzed and the results were compared. It can be concluded that the sway of semi-rigid frame structures in the limit serviceability state, can be predicted by the equivalent rigid frame structures with equivalent stiffness beams.

关 键 词：半刚性连接 组合梁框架 侧移 简化计算 

分 类 号：TU318[建筑科学—结构工程]