某多塔连体结构单元间动力相互作用对高架连廊的减震效果分析OA

The elevated corridor with grounding frame columns in a multi-tower connected structure is characterized by its large scale,considerable overhead height,and complex geometry.It is connected to the surrounding towers by means of energy-dissipating elements.The seismic action on the elevated corridor is shared by the grounding frame columns and the adjacent towers,which makes it challenging to quantitatively evaluate the contribution of the surrounding towers to the vibration control of the corridor.In this study,a dynamic elasto-plastic time history analysis was conducted on the actual structure.The time-history responses of the energy-dissipating elements were extracted,and the time-history responses of dynamic interactions between components were obtained through summation,thereby clarifying the distribution proportion of seismic action among the surrounding towers.The results indicate that the peak dynamic interaction forces for each tower occur at different times,exhibiting a non-synchronous characteristic.Moreover,when the seismic action on the elevated corridor reaches its peak,the dynamic interaction between the surrounding towers and the corridor remains below its maximum value even when both are in the same direction.Additionally,due to the incorporation of energy-dissipating elements,only 34.2%of the longitudinal seismic action and 40.6%of the transverse seismic action are resisted by the grounding frame columns of the elevated corridor,demonstrating that such installation helps reduce the seismic response of the structure.