钢筋混凝土双连梁短肢剪力墙结构试验研究

Experimental Study on Reinforced Concrete ShortLeg Shear Walls with Dual Binding Beams

摘要:

为了研究混凝土材料随机性对结构反应的影响,进行了4片相同的4层1∶3缩尺模型的双连梁短肢剪力墙结构非线性全过程试验研究.为了使各试件彼此相同,消除其他不确定因素的影响,在结构设计、材料配制、模型施工以及加载制度等方面进行了严格的控制.试验获得了荷载位移曲线、混凝土和钢筋的应变曲线以及墙体局部相对位移曲线.从水平承载力、侧向刚度、位移延性3个方面对比分析了各片墙体的反应,研究了结构应变、位移的变异性特征,给出了典型横截面受力状态的变化过程,分析了各试件在破坏特征上的差异性.研究结果表明，混凝土随机性与非线性

Abstract:

Pseudo static tests are conducted on the same four fourstory 1∶3 scaled shortleg shear wall specimens with dual binding beams in a bid to investigate how concrete stochastic characteristic affects the structural responses.Structure design,material preparation,specimen construction and loading system are fabricated strictly so as to eliminate other uncertain factors.Loaddisplacement curves,strain curves and partial relative displacement curves are obtained.Moreover,the bearing capacity,stiffness,and ductility are discussed.Strains variability,displacements variability and redistributed inner forces behavior of three typical crosssections are studied.Finally,failure characteristic of different specimens is contrasted.It is concluded that coupling of concrete randomicity and nonlinearity has notable effects on structural responses.