基于纤维模型的预应力混凝土桥墩滞回性能分析  

Study on Hysteretic Behavior of Prestressed Concrete Bridge Pier with Fiber Model

作　　者：王会利[1] 姜荣斌[1,2] 秦泗凤[3] 

机构地区：[1]大连理工大学桥梁工程研究所,辽宁大连116023 [2]同济大学建筑设计研究院有限公司,上海200092 [3]大连大学材料破坏力学数值试验研究中心,辽宁大连116022

出　　处：《防灾减灾工程学报》2013年第3期253-257,共5页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51008047;51108052)资助

摘　　要：采用纤维模型分析方法,分析预应力钢束配筋率、纵向普通钢筋配筋率和箍筋配筋率对预应力混凝土桥墩滞回性能和抗震特性的影响。结果表明,预应力混凝土桥墩的预应力钢束配筋率和纵筋配筋率越大,桥墩的滞回环"捏拢效应"越明显,残余位移越小,耗能能力降低;预应力混凝土桥墩箍筋配筋率越大,滞回环面积越大,桥墩的延性越好,抗剪能力越强。研究结果可为预应力混凝土桥墩滞回性能分析提供理论依据。The effects of the prestressed tendon reinforcement ratio, the ordinary longitudinal reinforcement ratio and the stirrup reinforcement ratio on the hysteretic behavior and seismic characteristics of the prestressed concrete bridge pier have been obtained with the fiber model analysis method. The analysis results show that for the prestressed concrete bridge pier： the greater the prestressed tendons reinforcement ratio and the ordinary longitudinal reinforcement are, the more obvious the pier＇s hysteresis loop ＂pinching effect＂ is, the smaller the residual displacement is, the lower the energy dissipation capacity is; and the greater the stirrup reinforcement ratio is, the larger the hysteresis loop area is, the better the ductility of bridge piers is, the greater the shear capacity is. The research results will provide a theoretical basis for the hysteretic behavior analy- sis of the prestressed concrete pier.

关 键 词：预应力混凝土桥墩 纤维模型 抗震特性 滞回性能 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] P315.9[交通运输工程—道路与铁道工程]