基于能量分析的MSCSS附加阻尼器参数研究

Study on the additional damper parameters of MSCSS based on energy analysis

基于巨子型有控结构体系(Mega-Sub Controlled Structure System,即MSCSS)的弹塑性能量分析,以结构位移控制率、加速度控制率和阻尼器耗能比作为MSCSS的三个抗震性能指标,分别研究了三个抗震性能指标在地震作用下沿附加阻尼器参数的变化规律,同时提出了一种评价MSCSS抗震性能的综合指标,给出了四种指标分别取最优值的附加阻尼器参数,比较了四种指标最优的MSCSS响应与能量结果,并分析了它们对地震动的敏感性。研究表明:以阻尼器耗能比作为MSCSS抗震性能指标具有同时控制位移响应和加速度响应的优点,综合指标吸取了三个抗震性能指标的优点,综合指标最优的MSCSS抗震性能最好,且对地震动的敏感性最小。

Based on the elastic-plastic energy analysis of the MSCSS(Mega-Sub Controlled Structure System),and using structural displacement control ratio,acceleration control ratio and damper energy dissipation ratio as seismic performance indexes of MSCSS,the variation law of three seismic performance indexes caused by additional damper parameters under seismic action was researched respectively.Meanwhile,a comprehensive index to evaluate the seismic performance of MSCSS was put forward,provided that the additional damper parameters of four indexes have the optimum values respectively.We compared the response and energy results of MSCSS under four optimum indexes,and analyzed the sensitivity of MSCSS under four optimum indexes to seismic ground motions.Research shows that:using the damper energy dissipation ratio as an index of MSCSS seismic performance has superiority that can control both the displacement and acceleration responses,the comprehensive index gets the advantage of three seismic performance indexes.MSCSS with optimum comprehensive index has the best seismic performance and the least sensitivity to seismic ground motion.