节段拼装桥墩拟静力试验研究  

TEST AND RESEARCH ON PSEUDO-STATIC FORCE OF SEGMENT-ASSEMBLED BRIDGE PIER

作　　者：陈剑[1] 胡磊[2] 布占宇[2] 

机构地区：[1]宁波大学建筑设计研究院有限公司,浙江宁波315211 [2]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《建筑技术》2012年第11期1042-1044,共3页Architecture Technology

基　　金：浙江省科技厅公益技术研究工业项目(2011C21078)资助;宁波市科技局社会发展科研项目(2011C50017)的资助;浙江省大学生科技创新活动计划(新苗人才计划)(2011R405023)的资助

摘　　要：节段拼装桥墩具有施工快、污染小和施工质量可靠等优点,目前国内主要用于一些跨海大桥引桥下部结构,而国外则在高速公路桥梁中得到大量应用。通过研究无粘结预应力带耗能钢筋干接缝节段拼装桥墩的拟静力试验进行仿真模拟,结果表明,无粘结预应力筋能减少桥墩的残余位移;普通钢筋能增大滞回环面积,使残余位移增大,同时可提高屈服强度和极限强度;无粘结预应力筋和普通耗能钢筋的配置比例应根据设计所要求的有效刚度和震后可修复的残余位移综合确定。Segment-assembled bridge pier has many advantages, such as fast construction, low pollution and reliable construction quality, etc. At present, it is mainly used as infrastructure of some cross-sea bridges in China and is comprehensively used in expressway bridges in foreign countries. After research on pseudostatic test simulation of segment-assembled bridge pier with dry joint of energy-consuming prestressed steel bar without bond, the simulation calculation results indicate that prestressed steel bar without bond coutd reduce residual displacement of bridge pier; ordinary steel bar could enlarge hysteretic loop area and increase residual displacement, while improving yield strength and ultimate strength; proportion between prestressed steel bar without bond and ordinary energy-consuming steel bar shall be determined according to the effective rigidity required in design and residual displacement which is repairable after earthquake.

关 键 词：节段桥墩 拟静力试验 纤维模型 预制施工 无粘结预应力筋 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]