|
|||||
|
|
| 南京长江第四大桥节段预制拼装箱梁足尺模型试验 | |
| 引用本文： | 刘钊,武焕陵,种艾秀,聂永福,惠卓,王景全.南京长江第四大桥节段预制拼装箱梁足尺模型试验[J].桥梁建设,2011(3). |
| 作者姓名： | 刘钊 武焕陵 种艾秀 聂永福 惠卓 王景全 |
| 作者单位： | 1. 东南大学土木工程学院,江苏南京,210096 2. 南京长江第四大桥建设协调指挥部,江苏南京,210033 3. 中交二航局四公司,安徽芜湖,241006 |
| 基金项目： | 江苏省交通科学研究计划(09Y11) |
| 摘 要： | 为研究节段预制拼装箱梁在正常使用阶段和施工状态下的结构行为,结合南京长江第四大桥开展了一孔48 m跨径该类箱梁的足尺模型试验。首先模拟正常使用荷载工况,测试试验梁的主要静力反应,然后模拟在张拉一部分预应力束的梁上通行运梁车的工况,测试试验梁的应力状况,并采用ANSYS建立试验梁实体有限元模型进行对比分析。研究结果表明:在正常使用阶段,节段预制拼装桥梁的整体性较好,键齿接缝两侧基本没有相对滑移,加载、卸载后梁体残余变形较小,力学行为基本符合平截面假定;在梁上运梁工况下,实测梁体下缘压应力约为6 MPa,距消压状态还有一定的安全储备。 |
| 关 键 词： | 预应力混凝土桥 节段预制 拼装 体外预应力 模型试验 有限元法 |
Full-Scale Model Test for Precast and Assembled Segmental Box Girder of the Fourth Nanjing Changjiang River Bridge |
|
| LIU Zhao,WU Huan-ling,CHONG Ai-xiu,NIE Yong-fu,HUI Zhuo,WANG Jing-quan.Full-Scale Model Test for Precast and Assembled Segmental Box Girder of the Fourth Nanjing Changjiang River Bridge[J].Bridge Construction,2011(3). | |
| Authors: | LIU Zhao WU Huan-ling CHONG Ai-xiu NIE Yong-fu HUI Zhuo WANG Jing-quan |
| Institution: | LIU Zhao1,WU Huan-ling2,CHONG Ai-xiu3,NIE Yong-fu1,HUI Zhuo1,WANG Jing-quan1(1.School of Civil Engineering,Southeast University,Nanjing 210096,China,2.Construction and Coordination Headquarters of the Fourth Nanjing Yangtze River Bridge,Nanjing 210033,3.The4th Engineering Company,CCCC Second Harbor Engineering Co.,Ltd.,Wuhu 241006,China) |
| Abstract: | To investigate the structural behavior of precast and assembled segmental box girders at regular service stage and in construction state,the full-scale model test for a span of 48 m box girder of such type of the Fourth Nanjing Changjiang River Bridge was made.Firstly,the regular service load cases were modeled and the main static responses of the tested girder were measured,then the load cases of traveling of the girder segment transportation trailer on that girder with part of its prestressing strands bei... |
| Keywords: | prestressed concrete bridge precast segment assembling external prestressing model test finite element method |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |