【摘要】 通过对一系列不同动力特性上部结构大底板多塔基础隔震结构的计算，分析研究了减震系数、地震波、大底板刚度对此结构减震效果的影响，分析了上部塔楼的动力特性对结构隔震效果的影响。结果表明：结构刚度相近塔楼组成的大底板基础隔震结构，塔楼的数量及布置方式均不影响结构的减震效果。结构刚度相差较大塔楼组成的大底板基础隔震结构，其减震效果差；通过增大较柔塔楼刚度或减小较刚塔楼刚度，可明显提高结构减震效果。结构刚度相差较大塔楼组成的大底板基础隔震结构，当较大刚度塔楼数量少时，结构的减震系数最大，且随着小刚度塔楼比重的逐渐增大，减震系数呈先变大后变小的规律。结构刚度相差较大塔楼组成的大底板基础隔震结构，当较大刚度塔楼数量多时，结构的减震系数随着大刚度塔楼比重的增大呈逐渐变小的规律。更多还原

【Abstract】 Through the calculation of a series of different dynamic characteristics of the upper structure of multi tower base isolated structure with large base plate, the influence of the damping coefficient, the seismic wave and the stiffness of the large base plate on the seismic absorption effect of the structure was analyzed. The influence of the dynamic characteristics of the upper tower on the structural isolation effect was analyzed. The results show that large base plate base isolated structure composed of towers with similar structural stiffness, the number and placement of towers do not affect the seismic absorption effect of the structure. Large base plate base isolated structure composed of towers with large differences in structural stiffness has poor seismic absorption effect. By increasing the stiffness of the flexible tower or decreasing the stiffness of the rigid tower, the seismic absorption effect of the structure can be obviously improved. Towers with large differences in structural stiffness form a large base plate base isolation structure. When the number of rigid towers is small, the structural damping coefficient is the largest. With the gradual increase of the specific gravity of smaller towers, the damping coefficient first increases and then decreases. Towers with large differences in structural stiffness form a large base plate base isolation structure. When there are rigid towers, the damping coefficient of the structure gradually decreases with the increase of the specific gravity of the towers with larger stiffness.更多还原