大跨径钢管混凝土拱桥在空间响应下的地震分析

Seismic Analysis of Long - span Concrete - filled Steel Tubular Arch Bridge with Spatial Effect

地震发生时,大跨度钢管混凝土拱桥由于桩土的联合作用、行波效应及多点激励效应等因素的影响,结构受力往往很复杂。针对大跨径钢管混凝土拱桥的抗震现状,提出了通过建立多个空间有限元模型,可实际地模拟钢管混凝土拱桥在地震作用下的多种空间效应。

The seismic mechanic behavior of long - span concrete - filled steel tubular arch bridges is complicated due to the combined effects of piles and soils, traveling wave and multipoint excitations. By several spacial finite element models, the paper presents simulate modeling and analysis of the spacial effects of seismic resistance of long - span stgeel pipe concrete arch bridges, accordingly some useful conclusions and suggestions are obtained.