斜拉桥锚箱式索梁锚固区应力及传力途径分析

张育智; 李乔; 满洪高

斜拉桥锚箱式索梁锚固区应力及传力途径分析

详细信息

作者简介:
张育智(1978- ),男,博士研究生,从事桥梁结构损伤识别方面的研究,电话:028-87600610,E-manl:civillq@swjtu.edu.cn

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出版历程
- 收稿日期: 2005-09-25
- 刊出日期: 2006-04-25

Analyses of Stresses and Force Transmission Route in Box-Shaped Anchorage Zone for Cable-Stayed Bridges

摘要

摘要: 为给出索力在主要焊缝间分配的定量描述及主要板件的受力特点和产生应力集中的原因,用有限单元法对锚箱式索梁锚固区应力进行了计算分析.研究表明:锚垫板传递总索力的约20%,其主要作用不是承担索力,而是将索力传给2块锚箱腹板;2块锚箱腹板与箱梁腹板的焊缝传递总索力的约80%,且2条焊缝传递的索力相近,剪应力沿焊缝长度方向呈“马鞍形”分布;各主要板件在面内、面外集中力及弯矩作用下有应力集中现象.
- 锚箱式索梁锚固区 /
- 有限单元法 /
- 传力途径 /
- 应力集中
Abstract: The finite element method was used to investigate stresses in the box-shaped anchorage zone for a cable-stayed bridge in order to give the quantitative description of cable force distribution along principal welding lines,the mechanical characteristics of the main plates and the cause of stress concentration.The research shows that the pad plate of the anchorage box bears about 20% of the total cable force,and its main function is not to bear the cable force but to transmit it to the two webs of the anchorage box.The two welding lines between the two webs and the girder web bear about 80% of the total cable force,and they bear almost equal force.The distribution shape of shear stress on the two welding lines looks like a saddle,and the concentration of stresses on the main plates is caused by in-plane and out-of-plane concentrated forces and bending moments.
- box-shaped anchorage zone /
- FEM(finite element method) /
- force transmission route /
- stress concentration

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参考文献(1)

李小珍,蔡婧,强士中.大跨度钢箱梁斜拉桥索梁锚固结构型式的比较研究[J].土木工程学报,2004,37(3):73-79.LI Xiaozhen,CAI Jing,QIANG Shizhong.Studies on models of cable-girder anchorage for long-span cable-stayed bridges with steel box girder[J].China Civil Engineering Journal,2004,37 (3):73-79.[2] 陈开利.大跨度斜拉桥斜拉索锚固结构的试验研究[J].世界桥梁,2004(1):29-37.CHEN Kaili.Studies on the test for anchorage zones of cable-stayed bridge[J].World Bridges,2004(1):29-37.[3] 刘庆宽,王新敏,强士中.南京长江二桥南汊桥索梁锚固足尺模型试验研究[J].土木工程学报,2001,34(2):50-54.LIU Qingkuan,WANG Xinmin,QIANG Shizhong.Full scale model test on anchorage zone of the second Yangtze river bridge at Nanjing[J].China Civil Engineering Journal,2001,34(2):50-54.[4] 陈伟庆,张强.南京长江二桥索梁锚固区模型试验分析[J].西南交通大学学报,2001,36(2):185-189.CHEN Weiqing,ZHANG Qiang.A model test on the anchorage zones of the second Nanjing Changjiang river bridge[J].Journal of Southwest Jiaotong University,2001,36 (2):185-189.[5] 刘庆宽,王新敏,强士中.斜拉桥索梁锚固区附加弯矩对梁体受力的影响[J].石家庄铁道学院学报,2000,13(4):62-65.LIU Qingkuan,WANG Xinmin,QIANG Shizhong.The affection of additional moment to the stress in beam in the zone of anchorage of cable-stayed bridge[J].Journal of Shijiazhuang Railway Institute,2000,13 (4):62-65.[6] 刘庆宽,强士中,张强,等.斜拉桥锚箱式索梁锚固区应力分析[J].桥梁建设,2001(5):14-16.LIU Qingkuan,QIANG Shizhong,ZHANG Qiang,et al.Analysis of stress in anchorage zone between box-shaped steel beam and cable in cable-stayed bridge[J].Bridge Construction,2001 (5):14-16.

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文章访问数: 1446
HTML全文浏览量: 85
PDF下载量: 389
被引次数: 0

斜拉桥锚箱式索梁锚固区应力及传力途径分析

作者简介: 张育智(1978- ),男,博士研究生,从事桥梁结构损伤识别方面的研究,电话:028-87600610,E-manl:civillq@swjtu.edu.cn

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出版历程

Analyses of Stresses and Force Transmission Route in Box-Shaped Anchorage Zone for Cable-Stayed Bridges

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出版历程

目录

作者简介:
张育智(1978- ),男,博士研究生,从事桥梁结构损伤识别方面的研究,电话:028-87600610,E-manl:civillq@swjtu.edu.cn