南京长江二桥南汊桥索梁锚固结构疲劳试验研究.pdf

文档介绍：第 22 卷第 1 期工程力学
2005 年 2 月 ENGINEERING MECHANICS Feb. 2005
文章编号:1000-4750(2005)01-0223-06
南京长江二桥南汊桥索梁锚固结构疲劳试验研究
*李小珍 1,蔡婧 1,强士中 1,刘庆宽 2
(1. 西南交通大学土木工程学院, 四川成都 610031; 2. 石家庄铁道学院, 石家庄 050043)
摘要:南京长江二桥南汊桥的斜拉索与钢箱梁的锚固采用了锚箱式索梁锚固结构,其受力复杂,特别在
运营活载作用下的疲劳性能值得关注。介绍了该索梁锚固结构的足尺模型疲劳试验,在理论分析和试验研
究结果的基础上,分析了该索梁锚固结构在循环荷载作用下的疲劳性能,得出一些有益的结论。
关键词:南京长江二桥;索梁锚固结构;疲劳试验;应力分布;应力幅
中图分类号:U447 文献标识码:A
MODEL FATIGUE TEST OF CABLE-GIRDER ANCHORAGE SYSTEM
OF THE 2ND NANJING YANGTZE-RIVER BRIDGE
*LI Xiao-zhen1 , CAI Jing1 , QIANG Shi-zhong1 , LIU Qing-kuan2
(1. School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China)
2. ShiJiaZhuang Railway Institute, ShiJiaZhuang 050043, China)
Abstract: The cable-girder anchorage with anchor-box is adopted to connect the cable with steel box girder in
the Second Nanjing Yangtze River Bridge. Its mechanic behavior is plicated and the fatigue performance
of the anchorage system under service live-loads needs special attention. The fatigue test of a full-scale model of
the anchorage zone is introduced in this paper. Based on theoretical analysis, the stress contribution of the
anchorage system under cyclic load and static load is analysized in detail, and the fatigue performance of the
anchorage system under cyclic loads is assessed.
Key words: the 2nd Nanjing Yangtze River Bridge;