现浇超高墩连续刚构桥横桥向抗震性能分析

Analysis of Seismic Performance of Cast-in-Place Continuous Rigid Frame Bridge with Super-High Piers in the Transverse Direction

摘要: 为研究现浇超高墩连续刚构桥在横桥向地震动作用下的抗震性能，建立了某超高墩连续刚构桥OpenSees非线性仿真分析模型，并以此探讨了跨径、墩高等结构参数对其横桥向抗震性能的影响规律。结果表明：1) 结构的墩底弯矩峰值随跨径的增大而呈减小趋势；随墩高的增加而逐渐减小。2) 墩底剪力随结构跨径和墩高的变化规律与墩底弯矩具有相似的趋势。3) 结构的墩顶位移随跨径增加呈现出先降低后增大的变化趋势；随着墩高的增大而逐渐增大。

Abstract: To study the seismic performance of the cast-in-place continuous rigid frame bridge with super- high piers under the action of transverse seismic waves, the nonlinear simulation analysis model of a continuous rigid frame bridge with super-high piers using OpenSees was established. And the influence of structural parameters such as span length and pier height on its seismic performance in the transverse direction was discussed. The results showed that: 1) The peak bending moment at the pier bottom of the structure decreased with the increase of span length, and gradually decreased with the increase of pier height. 2) The variation of shear force at the pier bottom with the span length and pier height of the structure showed a similar trend to that of bending moment at the pier bottom. 3) The displacement at the pier top of the structure decreased first and then increased with the increase of span length, and gradually increased with the increase of pier height.