【摘要】 针对L形偏心框架结构平面不规则问题,通过在外围框架设置屈曲约束支撑与粘滞阻尼器,采用串联刚片模型建立了偏心结构平扭耦联动力方程,运用有限元方法构建某国家工程实验室三维模型,对比分析了结构的扭转周期比、扭转位移比、层间位移角、层剪力最大值,研究了屈曲约束支撑与粘滞阻尼器混合减震方法对L形偏心框架结构的减震效果。计算结果表明:屈曲约束支撑能较好地控制结构的扭转周期比、扭转位移比;而粘滞阻尼器能大幅度减小结构的层间位移角、层剪力最大值,减震效果明显。更多还原

【Abstract】 The irregular plain problem of L-shaped eccentric frame structure was solved by installing buckling-restrained brace and viscous damper in the outer frame.A translation-torsion coupling dynamic equation of the eccentric structure was established with the series mass model.A three-dimensional model of one National Engineering Laboratory was built using the finite element method.The ratio of torsion period to translation period,torsional displacement ratio,story drift and maximum story shear of the structure were analyzed comparatively,and the effect of buckling-restrained brace and viscous damper hybrid energy dissipation method on the L-shaped eccentric frame was studied.The results showed that the buckling-restrained brace can control the ratio of torsion period to translation period and torsional displacement ratio well,and the viscous damper can greatly reduce structural story drift and maximum story shear,and the damping effect is quite obvious.更多还原