某六孔预应力大悬臂箱梁桥体外索加固分析  

External Cable Reinforcement Analysis of a Six-hole Prestressed Large Cantilever Box Girder Bridge

作　　者：卢晨怡[1] 祝向群[1] 凌中水[1] 秦超 余越[3] 史言稳 Lu Chenyi;Zhu Xiangqun;Ling Zhongshui;Qin Chao;Yu Yue;Shi Yanwen(Department of Architectural Engineering, Anqing Vocational and Technical College, Anqing, Anhui 246003, China;Ningbo City Construction Design Institute Co., Ltd., Ningbo, Zhejiang 315012, China;China Jiaotong Second Highway Survey and Design Research Institute Co., Ltd., Wuhan, Hubei 430056, China;Jiangsu Huarui Heavy Industry Machinery Co., Ltd., Changzhou, Jiangsu 213100, China)

机构地区：[1]安庆职业技术学院建筑工程系,安徽安庆246003 [2]宁波市城建设计研究院有限公司,浙江宁波315012 [3]中交第二公路勘察设计研究院有限公司,湖北武汉430056 [4]江苏华瑞重工机械有限公司,江苏常州213100

出　　处：《黑龙江工业学院学报（综合版）》2019年第9期55-60,共6页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基　　金：安徽省高校自然科学重点研究项目(编号:KJ2016A450);安徽省高等职业教育创新发展行动计划(编号:XM-4);安徽省高校优秀青年人才支持计划项目;安徽省省级质量工程项目(编号:2016xn2x025)

摘　　要：以某六孔预应力大悬臂箱梁桥为背景,建立该桥有限元模型,计算了其体外力张拉施工阶段挠度及应变的情况,并与监控实测值对比,结果表明:体外力张拉后各控制截面均出现上挠,各跨跨中挠度最大,与实测值趋势一致,各控制截面压应力均有不同程度的增加,可见体外力张拉后全桥内力及线形得到改善,桥梁病害有所好转。Based on a six-hole prestressed large cantilever box girder bridge, the finite element model of the bridge was established. The deflection and strain of the external tension tension stage were calculated and compared with the measured values. The results showed that after the external force tension, the control sections were all uplifted. and the deflection in each span was the largest, which was consistent with the measured value trend. The compressive stress of each control section increased to varying degrees. It could be seen that the internal force and shape of the whole bridge were improved after external tension. The disease of the bridge had improved.

关 键 词：体外力加固 挠度 应变 施工监控 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]