连体结构单侧层间耗能体系随机地震响应及优化研究

Stochastic seismic response and optimization of the connected structure with a one-side energy dissipation layer

为改善强连体结构的控制效果,提出单侧塔楼设置耗能层的新型连体结构控制体系。研究了耗能层控制参数及设置位置对各塔楼和结构总平均振动能的影响规律,并对耗能层参数进行了优化分析;基于随机地震响应的量化指标,对比了不同优化准则及不同控制方案下该控制体系的减震效果。结果表明,低位设置耗能层有助于地震能量的耗散,且能够显著降低结构地震响应;左、右塔楼的减震效果存在一定差异,不能同时达到各自的最优控制状态;当以总平均振动能最小为优化准则,耗能层设置于低楼层的控制方案,可以提供更有效的减震效果。

A novel control system with a one-side energy dissipation layer is proposed to enhance the control effect of strong-connected structures.The influence of the control parameters and the position of the energy dissipation layer on the total average vibration energy of each tower and the whole structure are investigated,as well as the parameters of the energy dissipation layer are optimized.Furthermore,the damping effects of the novel control system with various optimization criteria and control schemes are compared by using the quantitative indexes.The results show that:the low position of the energy dissipation layer contributes to more effective seismic energy dissipation,and thus significantly reduces the seismic response.Differences in the damping effects between the left and right towers are observed,and the optimal control states of towers cannot be achieved simultaneously.The excellent damping performance can be obtained when the energy dissipation layer is placed at a lower floor and using the minimal total average vibration energyas theoptimization criterion.