钢筋混凝土圆形截面柱式桥墩抗震性能评价

对4座典型的钢筋混凝土圆形截面双柱式桥墩，利用Priestley等建议的钢筋混凝土桥墩抗剪强度计算方法和型态描述方程，结合Rush-over方法进行了延性抗震能力评价。一般说来，纵桥向能够满足延性抗震要求，而横桥向一些配箍率较低的桥墩在地震中会发生脆性的弯剪破坏，其底部塑性铰将形成在柱基之中，部分桩基可能会遭受损害。

Seismic performance-assessment of RC circular column piers

In this paper shear strength calculation and failure mode assessment of RC bridge column proposed by Priestley are used, and ductility capacity of 4 typical RC circular doub le-column piers is discussed by push-over method. As a general result, ductility capacity in the longitudinal direction of the bridge can satisfy the seismic requirements, but in the transversal direction of the bridge some columns of lower transverse reinforcement ratio will produce semi-ductile shear-critical destroy with the plastic hinges formed at piles underground and some piles damaged.