«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

27卷

期数:

2010年01期

页码:

65-72

栏目:

出版日期:

2010-03-20

文章信息/Info

Title:

Out-of-plane Distortional Fatigue Stress Analysis at Web Gaps of Steel Bridges

作者:

王春生,成锋

长安大学 桥梁与隧道陕西省重点实验室,陕西 西安 710064

Author(s):

WANG Chun-sheng, CHENG Feng

Key Laboratory for Bridge and Tunnel of Shaanxi Province, Chang'an University, Xi'an 710064, Shaanxi, China

关键词:

钢桥;  腹板间隙;  面外变形;  疲劳应力;  超载

Keywords:

steel bridge;  web gap;  out-of-plane distortion;  fatigue stress;  overload

分类号:

U441.4

DOI:

-

文献标志码:

A

摘要:

采用ANSYS大型通用有限元软件对3跨连续钢板梁桥进行了三维数值模拟,研究了腹板间隙面外变形所产生的应力状态,并对腹板间隙大小、腹板厚度、横撑类型、横撑刚度等关键结构参数进行了分析; 根据某高速实际车辆动态称重实测结果,分析了超载车辆作用下腹板间隙处的面外变形应力。结果表明:腹板间隙大小和腹板厚度均对面外变形应力影响较大; 车辆超载时,腹板间隙处极易萌生疲劳裂纹。

Abstract:

Three-dimensional numerical simulation of a three-span continuous steel plate girder bridge was established to study the complex stress state caused by the out-of-distortion in web-gap using finite element software ANSYS. Meanwhile, some key structural parameters, such as web gap size, web thickness, cross-bracing type and cross frame stiffness were analyzed in the numerical models. The measured web gap sizes and web thickness types gave the great affection on the out-of-plane distortion fatigue stresses at web gaps. The results show that the influences of web gaps and cross frame on out-of-plane distortion are great. Fatigue cracking occurs easily at web gaps under overload.

参考文献/References:

[1] FISHER J W.Fatigue and Fracture in Steel Bridges[M].New York:John Wiley & Sons,1984.
[2]ASCE Committee on Fatigue and Fracture Reliability of the Committee on Structural Safety and Reliability of the Structural Division.Fatigue Reliability[J].Journal of the Structural Division,1982,108(1):3-88.
[3]CONNOR R J,FISHER J W.Identifying Effective and Ineffective Retrofits for Distortion Fatigue Cracking in Steel Bridges Using Field Instrumentation[J].Journal of Bridge Engineering,2006,11(6):745-752.
[4]王春生,钱 慧.钢桥腹板间隙面外变形疲劳研究综述[J].钢结构,2008,7(增):46-52. WANG Chun-sheng,QIAN Hui.Review of the Research on Web-gap Out-of-plane Distortional Fatigue in Steel Bridges[J].Steel Structure,2008,7(S):46-52.
[5]CASTIGLIONI C A,FISHER J W,YEN B T.Evaluation of Fatigue Cracking at Cross Diaphragms of a Multi-girder Steel Bridge[J].Constructional Steel Research,1988,9(2):95-110.
[6]FISHER J W,KEATING P B.Distortion-induced Fatigue Cracking of Bridge Details with Web Gaps[J].Journal of Constructional Steel Research,1989,12(3/4):215-228.
[7]FISHER J W,JIAN Jin,WAGNER D C,et al.Distortion-induced Fatigue Cracking in Steel Bridges[R].Washington DC:Transportation Research Board,1990.
[8]COUSINS T E,STALLINGS J M,LOWER T E,et al.Field Evaluation of Fatigue Cracking in Diaphragm-girder Connections[J].Journal of Performance of Constructed Facilities,1998,12(1):25-32.
[9]STALLINGS J M,COUSINS T E,STAFFORD T E.Removal of Diaphragms from Three-span Steel Girder Bridge[J].Journal of Bridge Engineering,1999,4(1):63-70.
[10]FRASER R E K,GRONDIN G Y,KULAK G L.Behaviour of Distortion-induced Fatigue Cracks in Bridge Girders[R].Edmonton:University of Alberta,2000.
[11]MIKI C.Maintaining and Extending the Lifespan of Steel Bridges in Japan[C]//IABSE.Extending the Lifespan of Structures.San Francisco:IABSE,1995:53-68.
[12]MIKI C,ICHIKAWA A.Fatigue Assessment of Steel Bridges of Bullet Train System[C]//IABSE.Evalu-ation of Existing Steel and Composite Bridges.New York:IABSE,1997:221-230.
[13]WANG Chun-sheng,QIAN Hui,ZHAN Ang,et al.Fatigue Evaluation of a Railway Steel Bridge Based on In-site Test Data[C]//IABSE.Improving Infrastructure World-bringing People Closer.Stuttgart:IABSE,2007:476-477.
[14]ZHAO Y,RODDIS W M K.Finite Element Study of Distortion-induced Fatigue in Welded Steel Bridges[J].Transportation Research Record,2003(1845):57-65.

相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2010-01-10
基金项目:高等学校全国优秀博士学位论文作者专项资金项目(2007B49)
作者简介:王春生(1972-),男,黑龙江绥化人,教授,工学博士,E-mail:wcs2000wcs@163.com。

常用功能

更新日期/Last Update: 2010-03-20