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针对高层混合结构中适用于推覆分析的剪力墙单元与型钢混凝土构件塑性铰等问题进行研究,利用三垂直杆元模拟剪力墙,各杆元分别考虑剪力墙轴向、剪切与弯曲变形;根据型钢混凝土构件截面承载力与变形能力,给出了反映截面弯矩与转角关系的型钢混凝土构件塑性铰特性值计算方法;应用MIDAS/GEN软件作为弹塑性分析工具,采用改进的剪力墙单元模型,自定义型钢混凝土构件塑性铰特性值,对30层高混合结构进行推覆分析,并与模型试验结果对比,结果表明:推覆分析所得基底剪力-顶点位移曲线与试验结果较符合,各构件塑性铰分布及状态与模型试验的裂缝分布及破坏模式符合较好,能够反映出混合结构各构件变形和结构整体承载力变化过程.
In view of the problems of plastic hinge of shear wall elements and steel reinforced concrete members which are suitable for the analysis of pushover in high-rise mixed structures, three vertical rod-element simulation shear walls are used, and each rod element considers the axial, shear and According to the section bearing capacity and deformation capacity of SRC member, the method to calculate the plastic hinge characteristic value of SRC member is given. The software MIDAS / GEN is used as the analysis tool of elastic-plastic analysis, Force wall element model and the plastic hinge characteristic value of the self-defined steel reinforced concrete member, the pushover analysis of the 30-story high-mixing structure is carried out and compared with the model test results. The results show that: the base shear-apex displacement curve and the test results The results show that the fracture distribution and failure mode of the plastic hinge distribution and the state of each component are in good agreement with the model test, which can reflect the deformation of the components of the hybrid structure and the change of the overall bearing capacity of the structure.