【摘要】 针对工程界比较关注的柱串联隔震系统的水平刚度问题,建立了水平刚度计算公式,探讨了压应力对水平刚度及结构地震响应的影响。首先建立了单个叠层橡胶支座的场矩阵;其次根据传递矩阵法建立了柱串联隔震系统的场矩阵,根据所得场矩阵推导出串联隔震系统顶部状态变量与任意截面内力和位移之间的关系,进而推导出串联隔震系统的水平刚度计算公式,避免了繁琐的力学推导过程;最后探讨了压应力对水平刚度及结构地震响应的影响。结果表明水平刚度随着压应力的增大而减少,近断层附近建议采用隔震支座直接固定在基础上的隔震方案。更多还原

【Abstract】 The calculation formula for horizontal stiffness of laminated rubber bearing serially connected with column,in concerned engineering field,was put forward and the compressive stress influences on horizontal stiffness and dynamic response of isolated structure were investigated.The field matrix of single laminated rubber bearing was provided and then the field matrix of laminated rubber bearing serially connected with column was established.The relation between internal force and displacement at arbitrary cross section and the state variables at the top of bearing were obtained and the horizontal stiffness expression based on transfer matrix method were derived,avoiding tedious mechanical derivation.Finally,compressive stress influences on horizontal stiffness and seismic response of isolated structure were investigated.The results show that the horizontal stiffness decreases with the rise of compressive stress.The isolation scheme consisting of laminated rubber bearings directly fixed on foundation in the neighborhood of fault area was suggested.更多还原