弯曲型支撑框架的弹性稳定分析  

ELASTIC STABILITY OF FRAMES WITH BENDING-TYPE BRACING SYSTEM

作　　者：陈红英[1] 童根树[2] 

机构地区：[1]青海大学 [2]浙江大学

出　　处：《土木工程学报》2001年第6期17-22,共6页China Civil Engineering Journal

基　　金：浙江省科委重点基金项目

摘　　要：对设有弯曲型支撑的钢框架结构的整体弹性稳定进行了分析 ,得到了理想状态下 ,弯曲型支撑框架结构的稳定方程。通过对r =0 5～ 1 0时的大量计算分析 ,得到了弯曲型支撑框架结构的临界相对支撑刚度Rth的近似计算公式。用有限元方法验证的结果表明 ,近似解析解具有足够的精度 ,该公式可以作为稳定计算时 ,框架有侧移和无侧移的判定准则。对弱支撑框架 ,本文给出了临界荷载和支撑刚度的关系。The elastic stability of steel frame with bending-type bracing system is studied in the paper Some formulae and tables for determination of the threshold stiffness of the bracing system are obtained A comparison is shown that the results of the proposed formulae are in good agreement with the results of finite element method The formulae may be used as a criterion to judge the sdiesway and no sidesway frame in the stability analysis When the stiffness of a bracing system is less than the threshold value,the relation between the critical load and relative bracing stiffness is discussed in detail in the paper

关 键 词：稳定性 支撑 框架 钢结构 高层建筑 

分 类 号：TU973.13[建筑科学—结构工程]