【摘要】 选取结构刚度特征值和核心筒高宽比为参数,建立型钢混凝土框架-钢筋混凝土筒体混合结构非线性参数化模型。采用静力非线性分析方法,对混合结构目前存的主要问题进行研究,包括:混合结构主要破坏模式、内力分布、剪力重分配、竖向构件设计等。研究表明,混合结构破坏模式对其抗震性能影响很大,设计时应避免框架柱先于核心筒破坏的情况。在此基础上,以整体倾覆为理想破坏模式,对混合结构核心筒高宽比、结构刚度特征值、构件轴压比以及框架剪力分担率等主要设计指标提出取值建议。更多还原

【Abstract】 A parametric model is established for hybrid structures with various stiffness characteristic values and core tube aspect ratios.Some of the major issues of hybrid structure design is studied through nonlinear static analysis of failure mode,internal force distribution,shearing force redistribution,mechanical characteristics and design of the vertical members,etc.The results show that the failure mode of a hybrid structure a significantly affects its seismic performance,thus it should be avoided for frames to fail before core tube.Taking integral overturning as the ideal failure mode,some suggestions on failure mode,core tube aspect ratio,stiffness characteristic value,member axial compression ratio,shearing fore share rate of outer-frame,etc.,are proposed.更多还原