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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。
According to the dynamic and structural features of the grid roof structure, a small-character viscoelastic dampener is proposed to reduce the vibration of the roof. The single-point model is used to derive the formula for calculating the damping ratio of the roof structure after the energy- According to the vibration spectrum theory, the formula of single element point analysis to predict the damping coefficient of roof energy dissipation structure is deduced. For the detailed design of energy dissipation structure, the vibration mode decomposition response spectrum method or time history analysis method is used. Finally, The results show that the viscoelastic dampers energy dissipation brace can effectively reduce the seismic response of the grid roof structure caused by horizontal earthquakes, including roof lateral displacement, node horizontal acceleration and column foot reaction.