【摘要】 进行了4个1/2比例SRC柱-RC梁组合件的低周反复加载试验,研究不同强节点系数的SRC柱-RC梁节点在各受力阶段的抗震性能、变形组成和合理的节点构造形式。试验结果表明,试件的破坏形态和变形组成与强节点系数有关,所采用的节点连接构造合理。基于试验数据和局部-整体变形关系,探讨了各受力阶段SRC柱-RC梁组合件的弯曲变形、节点核心区剪切变形、纵向钢筋在节点区的滑移变形等组成部分在组合件整体变形中所占比例及其变化规律。分析结果表明,梁变形所产生的侧移在强柱弱梁型SRC柱-RC梁组合件总侧移中所占比例最大,核心区剪切变形所占比例随强节点系数的减小而增大。通过对各受力阶段破坏特征描述和相应特征参数试验结果的分析,提出了强柱弱梁型SRC柱-RC梁框架结构满足运行、基本运行、可修和避免倒塌等四个抗震性能水平的位移角限值分别为1/500、1/150、1/75和1/30。研究成果可供SRC柱-RC梁组合结构地震反应分析和工程应用参考。更多还原

【Abstract】 Cyclic loading tests were carried out on four half-scale SRC column-RC beam subassemblies.The key test parameter was strength ratio of joint to beam,η.The seismic behavior and deformation components of SRC column-RC beam subassemblies with different η were investigated,and a new joint details was experimentally validated.It is indicated that the strength ratio of joint to beam has great effect on the failure mode and deformation components of specimens,and that the joint details proposed is sound to have a satisfying seismic performance.Based on the test data and the geometrical relationship of global and local deformation of beam-column subassemblies,the percentages of each of the deformation components due to beam plastic deformation within the plastic hinge,anchorage slip in the joint and shear deformation of joint to the global deformation of the beam-column subassemblies and their characteristics were investigated.Analytical results show that the deformation components due to beam plastic hinging is dominant in all those deformation components and that the deformation components due to shear of joint increase along with a decreasing of strength ratio of joint to beam.Finally,a series of drift limit for the four different seismic performance levels are recommended based on the test results.更多还原