大跨双槽渡槽横向地震响应分析

针对大型渡槽槽身采用薄壁结构的特点，提出大型双槽截面渡槽横向地震响应分析模型。渡槽槽身采用薄壁梁段单元模型，该单元可以考虑渡槽槽身弯曲、自由扭转、约束扭转以及弯曲扭转耦合振动等结构自身特性；渡槽支架采用普通梁单元模拟，渡槽与支架连接所用的盆式橡胶支座，可用集中弹簧模拟。文中采用4种典型地震动计算了双洎河大型渡槽的横向地震响应，给出了该大型渡槽关键部位的地震响应最大值，所得结果可为该大型渡槽抗震设计提供参考。

Lateral seismic response analysis of large-scale double cell aqueduct

Based on thin-walled girder structural characteristics of large-scale aqueduct body, this paper presents a model for lateral seismic response analysis of the large-scale double-cell aqueduct. The aqueduct body is idealized as an assemblage of thin-walled girder elements. The influences of aqueduct tranversal deformations, free torsion, restrained torsion and tranversal bending-torsion deformation are considered. The pile of aqueduct is simulated to be beam elements. The pot type rubber bearing linking the pile and body of the aqueduct is simulated using spring elements. The lateral seismic responses of Shuang-ji River aqueduct subjected to 4 typical earthquake wave input are calculated. The maximal responses of every controlled point are given out. These computation results can be used as a reference to the seismic design of the large-scale double-cell aqueduct.