摘要
联肢剪力墙弹性阶段的内力分布、抗侧刚度等工作性能主要受墙肢与连梁刚度的影响。为了准确分析外包钢板-混凝土联肢组合剪力墙的受力性能,对外包钢板-混凝土组合连梁的刚度进行了分析。基于钢板与混凝土无相对变形和忽略混凝土抗拉强度的基本假定,建立了组合连梁钢与混凝土无滑移的截面内力与变形之间的关系,并推导了截面刚度的计算公式。对于常用工程设计参数范围内的组合连梁,考虑滑移后得到的抗侧刚度相比无滑移情况减小了10%~24%。通过对无滑移组合连梁刚度公式中的混凝土部分贡献的折减(折减系数为0.5),得到了无特殊界面构造的外包钢板-混凝土组合连梁的刚度计算公式。通过与有限元分析和试验结果的对比,验证了公式的准确性。
The structural performances,such as the internal force distribution,lateral stiffness,etc.,of the coupled shear walls are mainly influenced by the stiffness of the wall piers and coupling beams. The stiffness of the concrete filled steel plate composite coupling beam is studied to provide the basis for the analysis of composite coupled shear walls. Based on the assumptions that the concrete infill and surface plates are deformed without relative deformations and the concrete tensile strength is equal to 0,the relationships between the internal forces and sectional deformations of the composite coupling beams without slip are established,and the stiffness formulae are deduced. It is found that the slip between the concrete infill and surface plates has great effect on the beam stiffness. The lateral stiffness of the composite coupling beams may decrease by 10% to 24% when slip is considered. The stiffness formulae of the composite coupling beams without shear connectors are proposed by introducing a reduction factor of 0. 5 to the stiffness formulae of the ideal composite coupling beams without slip,which are verified to be accuracy by the finite element model and test results.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2014年第8期65-71,共7页
Journal of Building Structures
基金
国家科技支撑计划项目(2011BAJ09B01)
国家自然科学基金项目(51178246)
清华大学自主科研计划(2012Z06117)
关键词
外包钢板-混凝土组合连梁
钢管混凝土
连梁
刚度
滑移
剪切变形
弯曲变形
concrete filled steel plate composite beam
coupling beam
concrete filled steel tube
stiffness
slip
shear deformation
flexural deformation
