【摘要】 本文应用多质点弹簧、阻尼体系模拟半无限地基的动力阻抗特性,建立上部建筑-基础-地基耦连体系在时域求解的振动方程。在此基础上考虑结构构件在强震作用下的非线性与滞回特性,进行了高层建筑地震反应的历时分析,并通过实例研究了输入地震动强度、频谱特性以及地基刚度、结构构件非线性恢复力参数等诸多因素对高层建筑地震反应的影响。更多还原

【Abstract】 The equations of motion for the dynamic analysis of a coupled soil-foundation-superstructure system in the time domain is established, in which a multiparameter lumped mass-spring-dashpot system is used to simulate the frequency-dependent dynamic impedance of viscoelastic halfspace. Based on it the time history response of high-rise buildings is conducted taking into consideration of the nonlinear and hysteretic behaviour of structural members. Numerical examples are given and the effects of the earthquake input intensity, the spectral characteristics, the stiffness of the underlying soil medium and the variation of the parameters of the nonlinear restoring-force model on the seismic response of high-rise buildings are examined.更多还原