【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的耦合效应对结构反应所造成的影响不可忽视.更多还原

【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.更多还原