屈曲约束钢板剪力墙约束板研究(I)——理论模型与刚度需求  

Research on buckling restrainers in buckling-restrained steel plate shear walls(I)——theoretical model and stiffness requirement

作　　者：金华建[1] 李国强[2] 孙飞飞[2] 陆烨[1] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《土木工程学报》2016年第6期38-45,共8页China Civil Engineering Journal

基　　金：国家科技支撑计划项目(2013BAJ13B02)

摘　　要：首先基于薄板小挠度理论,给出了两边连接钢板剪力墙(两对边固支两对边自由)几何边界条件和内力边界条件的挠曲面函数近似表达式,然后利用瑞利—里兹法得到钢板剪力墙的弹性屈曲承载力,并借助于有限元分析方法,得到其屈曲系数的简化计算公式。同时,通过考虑弹塑性屈曲的影响,以及芯板的削弱、约束板与芯板非连续接触等因素,对屈曲系数的计算公式作进一步修正,最终确定了约束板的刚度需求设计公式。The approximate expression of function that describes the deflection surface of the plate with two opposite end clamped while other two opposite end fixed,which satisfies both geometric and force-related boundary condition,is proposed firstly based on small-deflection thin plate theory.Then,the Rayleigh-Ritz method is applied to obtain the bearing capacity of elastic buckling,and with the aid of finite element analysis,the simplified formula of buckling coefficient is derived.Meanwhile,by taking the effect of elastic-plastic buckling,the reduced flexural stiffness of core plate and the discontinuous contact between the restrained plate and the core plate into account,the calculation formula for buckling coefficient is modified.Finally,the design formula of calculating the flexural stiffness required by buckling restrainer is determined.

关 键 词：屈曲约束 约束板 刚度需求 小挠度理论 

分 类 号：TU392.4[建筑科学—结构工程]