【摘要】 为评估设非线性液体黏滞阻尼器钢框架-混凝土核心筒结构在罕遇地震作用下的减震效果,以某典型的高层建筑实际工程为背景,采用PERFORM-3D程序建立三维计算模型,分别输入3条地震波进行非线性动力时程分析。然后根据原结构和减震结构的分析结果,从楼层位移、楼层位移角、塑性损伤和结构耗能分布等方面进行了对比分析。分析结果表明:设非线性液体黏滞阻尼器后,钢框架-混凝土核心筒结构的楼层位移、层间位移角和塑性损伤都明显减小,并达到罕遇地震作用下的预期减震目标;对比原结构,由于阻尼器消耗了大部分地震能量,使得减震结构构件的非弹性耗能有所减少。针对罕遇地震作用下的减震效果,对减震结构方案提出了具体改善措施,以供实际工程参考。更多还原

【Abstract】 To evaluate damping effects of steel frame-concrete core wall structure with viscous dampers under severe earthquake,a typical high-rise building with and without dampers are modeled and analyzed by PERFORM-3D program. Nonlinear dynamic time-history analyses are performed under 3 inputs of earthquake records,respectively.And then comparison of the analysis results is conducted with original structure in four respects such as floor displacement,story drifts,plastic damage and energy dissipation etc. The analysis results show that the use of nonlinear fluid viscous dampers on the steel frame-concrete core wall structural system results in obviously reducing seismic responses of the structure,comparing with the case without dampers; when the dampers installed,the floor displacement,story drifts and the plastic damage of the structure decrease and then can meet the damping goal under severe earthquake; when the structure installed dampers,inelastic energy dissipation of the structure decrease significantly because of damper ’s energy dissipation. On this basis,some valuable suggestions about improving the damping structure are put forward into practical application.更多还原