【摘要】 提出一种新的基于弹簧-偏心轴承的滚动隔震支座,并将此隔震支座应用于一输电铁塔结构地震响应分析中。考虑输电塔为弯剪型多自由度体系模型,建立了输电塔基础滚动隔震体系运动方程。将隔震体系运动方程化为状态方程,在SIMULINK环境下进行仿真分析。研究结果表明,该隔震系统可有效地消减地震能量向上部结构的传递;隔震支座的弹簧可有效地限制滚动板的位移,保证滚动隔震支座的自动复位能力;嵌于滚动板之上的正交轴承系统很好地解决了滚球定位及同步运动问题。更多还原

【Abstract】 A new rolling isolator based on spring-eccentric bearing was proposed,which was applied to the seismic response analysis of a transmission tower structure.The dynamic equation of the rolling isolation system was established,assuming that the transmission tower be a flexure-shear type MDF system.The dynamic equation of the rolling isolation system was changed into a state equation and was analyzed in SIMULINK environment.The results had shown that the isolation system reduced transfer of earthquake energy;the spring of the isolator restrained effectively the displacement of the motherboard,thus improving the restoring capacity of transmission tower;the orthogonal bearing system embedded on roll board can keep the rolling balls in its position and in same step movement.更多还原