全钢型板式防屈曲支撑无粘结层的有限元分析  

The finite element analysis of unbonded layer of all-steel plate-like buckling-restrained brace

作　　者：王浩[1] 邓雪松[1] 周云[1] 

机构地区：[1]广州大学,广东广州510006

出　　处：《土木工程学报》2013年第S1期13-18,共6页China Civil Engineering Journal

基　　金：广东省自然科学基金(06021581);广东自然科学基金研究团队项目(83510091000001);广东省科技计划项目(2007B030401010)

摘　　要：设计26个试件,包括18个设置无粘结层和8个不设置无粘结层的全钢型板式防屈曲支撑,研究无粘结层不同面积、厚度、剪切模量等参数对支撑的耗能能力和核心单元与约束单元间摩擦力的影响规律,采用ABAQUS有限元软件对全钢型板式防屈曲支撑进行模拟分析。结果表明:弱轴方向的无粘结层是降低全钢型板式防屈曲支撑受压过程中产生摩擦力的主要因素;无粘结层厚度对全钢型板式防屈曲支撑的耗能性能影响较大;无粘结层通过其材料的切向变形减小摩擦,受摩擦系数影响较小;无粘结层的接触应力随其自身剪切模量的增大而增大;无粘结层可以解决全钢型板式防屈曲支撑因尺寸效应引起的严重拉压不平衡问题。Design 26 all-steel plate-like buckling-restrained braces( PBRBs) specimens which including 18 with unbonded layer specimens and 8 specimens with no unbonded layer. Studying how unbonded layer's area,thickness,shear modulus and other parameters to effect PBRBs energy dissipation behavior and the friction between core and encasing unit,and using finite element analysis software ABAQUS to simulate all-steel PBRBs,The results show that the unbonded layer on witch the weak axis of core is the key factor to reduce the friction between core and encasing unit; The thicknesses of the unbonded layer have greater impact on PBRB's energy dissipation capacity; Unbonded layer used the tangential deformation of its material to reduce friction and was affected less by friction coefficients; The unbonded layer's contact pressure increase with the increase of the shear modulus; Unbonded layer can solve the problem of all-steel PBRB due to the size effect caused serious tension and compression imbalance.

关 键 词：防屈曲支撑 无粘结层 耗能能力 摩擦力 

分 类 号：TU392.4[建筑科学—结构工程]