可恢复系梁对双柱墩桥梁抗震性能的影响

Study on Seismic Performance of Double-pillar Pier Bridge with Restorable Beam

为研究桥梁在地震后的可恢复性,文中提出了一种适用于双柱式高墩桥梁的可恢复耗能系梁,以石坪大桥高架公路二桥为研究对象,对结构进行非线性时程分析。基于ANSYS软件建立双柱式高墩模型,分析了不同阻尼参数下双柱式高墩结构的地震响应参数,确定了最优阻尼参数。对可恢复系梁设置前后结构的抗震性能对比,得出设置可恢复系梁后,桥墩结构的墩顶位移、墩底剪力、墩底弯矩均有所降低。

In order to study the recoverability of Bridges after the earthquakes,this paper proposes a kind of recoverable energy consumption tie beam suitable for the double-pillar type high-pier Bridges,and the second bridge of overhead highway in Shiping Bridge is taken as the research object to conduct the nonlinear time history analysis on the structure.The model of double-pillar type high pier is established based on the ANSYS software,and the optimal damping parameters have been determined by comparing the seismic response parameters of doublepillar type high pier structure with the different damping parameters.By comparing the seismic performance of structure before and after setting the recoverable damper,the results show that all the pier top displacement,pier bottom shear and pier bottom bending moment of pier structure are reduced after the setting of recoverable tie beam.