【摘要】 根据网格屋盖结构的动力特性和构造特点,提出粘弹性阻尼器小八字消能支撑进行减震控制,并采用单质点模型推导出设置消能支撑后屋盖结构的阻尼比计算公式,进一步依据震动谱理论推导出单质点分析法预测屋盖消能结构减震系数的公式,对于消能结构的详细设计则采用振型分解反应谱法或时程分析法,最后结合工程实例进行了数值分析,结果表明:粘弹性阻尼器消能支撑可以有效降低网格屋盖结构由水平地震主导的反应,包括屋盖侧移、节点水平加速度、柱脚反力等。更多还原

【Abstract】 The viscoelastic energy dissipative brace was applied to lattice roof-structure for seismic control in this paper.The equation to calculate the damping ratio of the structure and the equation to estimate the control effect were established successively according to single mass point model.And the mode decomposition response spectrum method or the time history analysis method was suggested for detailing design.Two specific projects were taken as examples for numerical analysis.The results indicated that the viscoelastic energy dissipative brace can evidently reduce the response induced mainly by horizontal earthquake excitations,including the roof deformation,the node horizontal acceleration and the reaction of column foot.更多还原