【摘要】 采用双线性滞回模型,对并联基础隔震体系进行了单质点的弹塑性能量反应谱分析,综合考虑地震动三要素和结构自身动力特性,探讨了地震总输入能量受各种因素影响的变化规律.研究表明,并联基础隔震体系的地震总输入能量谱曲线受地震动特性及其自身的自振周期的影响较大,地面加速度峰值越大,地震波的卓越周期越大,地震波的持时越长,输入结构的总输入能也越大.总输入能量对屈服剪力系数、第二刚度系数、摩擦系数和阻尼比的敏感性不是很突出,在较长的周期范围内,摩擦系数的增大和阻尼比的增加,都使地震动总输入能量有略微增大的趋势.更多还原

【Abstract】 Based on the bilinear hysteretic model,the elasto-plastic energy analysis of the parallel base-isolated system is carried out.Considering three factors of earthquake motion and dynamic character of structure,variation rule of various factor contribution subjected to the total input energy is investigated.Results show that earthquake motion character and natural vibration period of structure affect greatly earthquake input energy spectra of parallel base-isolated system.The total input energy enlarges with increasing peak ground acceleration and earthquake wave eigenperiod and duration.The sensitivity of earthquake input energy to yielding shear coefficient and second stiffness coefficient and friction coefficient and damping ratio is not remarkable.In the range of longer period,the total input energy increases slightly with increasing friction coefficient and damping ratio.更多还原