新型网壳减震体系弹塑性时程分析与振动台实验研究

Elasto-plastic time-history analysis and shaking table test for a new energy-dissipation system of reticulated shell structure

针对多自由度复杂体系的网壳结构的抗震性能,提出了设置屈曲约束支撑的新型网壳减震体系。通过理论分析与数值模拟的方法证明了此新体系良好的抗震性能,进一步利用网壳结构缩尺模型进行模拟地震振动台实验研究以验证其性能,并分析新型网壳减震体系在不同水准地震作用下的动力特性与减震耗能性能。理论分析和实验结果表明,在地震作用下设置了屈曲约束支撑的单层球面网壳地震响应有所减小,屈曲约束支撑起到一定减震耗能作用。

A new energy-dissipation system was proposed to enhance aseismic performance of reticulated shell structure with buckling restrained braces （BRB） of a reticulated shell, one kind of MDOF complex systems. The performance earthquake resistance of the new energy-dissipation system was analyzed with theoretical analysis and numerical simulation. The shaking table test for its reduced scale model was made to analog its dynamic characteristics and energy-dissipation capacity under different levels of seismic action. The results showed that the seismic response of Kiewit dome with buckling restrained braces decreases and the buckling restrained brace has a certain action of vibration reduction and energy-dissipation.