[1]刘〓嘉,季则亮,瞿伟廉,等.铁路钢桥节点既有腐蚀疲劳裂纹扩展寿命[J].长安大学学报(自然科学版),2018,38(02):69-77.
　LIU Jia,JI Ze liang,QU Wei lian,et al.Corrosion fatigue crack propagation life of joints of railway steel bridge[J].Journal of Chang’an University (Natural Science Edition),2018,38(02):69-77.
点击复制

铁路钢桥节点既有腐蚀疲劳裂纹扩展寿命()
分享到：

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第38卷
期数:
2018年02期
页码:
69-77
栏目:
桥梁与隧道工程
出版日期:
2018-03-31

文章信息/Info

Title:
Corrosion fatigue crack propagation life of joints of railway steel bridge
作者:
刘〓嘉; 季则亮; 瞿伟廉; 卢家星
（1. 武汉理工大学 道路桥梁与结构工程湖北省重点实验室，湖北 武汉 430070； 2. 武汉理工大学 土木工程与建筑学院，湖北 武汉 430070； 3. 武汉地铁集团有限公司，湖北 武汉 430030）
Author(s):
LIU Jia;  JI Zeliang;  QU Weilian;  LU Jiaxing
关键词:
桥梁工程; 腐蚀疲劳裂纹扩展寿命; 多尺度建模方法; 节点横梁; 子模型法
文献标志码:
A
摘要:
为评估服役中铁路钢桥由于环境腐蚀作用产生初始裂纹后的剩余疲劳寿命，对列车行走荷载作用下铁路钢桥节点横梁处在环境腐蚀形成初始裂纹后的疲劳裂纹扩展寿命进行研究。以铜九（铜陵—九江）线鄱阳湖铁路钢桥为背景，基于子模型法的多尺度建模方法，运用通用有限元软件建立铁路钢桥整体壳体模型和节点横梁处含初始裂纹的精细网格划分的实体模型，获得了在列车行走荷载作用下铁路钢桥节点横梁处的精确动应力响应；基于断裂力学的四参数Forman公式对铁路钢桥在4种不同初始裂纹长度下的腐蚀疲劳裂纹扩展寿命进行了评估与对比，并对有无环境腐蚀作用下的疲劳裂纹扩展寿命进行了对比分析。结果表明：基于子模型法的壳实体多尺度建模方法既可以满足大型复杂结构在数值计算过程中的计算效率，又能够满足评估疲劳寿命计算所需的精确动力响应要求，可以精确评估铁路钢桥腐蚀疲劳裂纹扩展寿命；铁路钢桥既有腐蚀疲劳裂纹扩展寿命主要产生在小裂纹扩展阶段，计算得到0.5 mm初始裂纹扩展到10 mm时需要循环484 509次，占总扩展寿命的50.2%；铁路钢桥疲劳裂纹扩展寿命受环境腐蚀的影响非常大，其比无腐蚀疲劳裂纹扩展寿命降低79%左右。研究结果可为预测疲劳裂纹发展趋势、评估铁路钢桥剩余寿命和评定结构的安全性与运营能力提供参考。
Abstract:
In order to evaluate the residual fatigue life of the serviced railway steel bridge after the occurrence of initial crack due to the environmental corrosion, the corrosion fatigue crack propagation life of crossbeam region on joints of steel railway bridge after the existence of corrosion fatigue crack in the environmental corrosion was studied under the train running load in this paper. Taking the Poyang Lake Railway Steel Bridge on Tongjiu (Tongling to Jiujiang) Line as a research background, the integral shell element model of steel railway bridge and the finely meshed solid model of joints with initial crack were established by using general finite element software based on the multiscale modeling method of the submodel method. The precise dynamic stress response of the joints of steel railway bridge was obtained under the train running load. The corrosion fatigue crack propagation life of steel railway bridge with four different initial crack lengths were evaluated and compared based on the four parameters Forman formula, and the crack propagation life with or without environmental corrosion of railway steel bridge was analyzed and compared. The results show that the shellsolid multiscale modeling method based on the submodel method can not only meet the computational efficiency of the largescale complex structure in the numerical calculation process, but also meet the requirements of precise dynamic response required for the calculation of fatigue life, and it can accurately evaluate corrosion fatigue crack propagation life of railway steel bridge. The corrosion fatigue crack propagation life of railway steel bridge is mainly produced in the small crack propagation stage, a 0.5 mm initial crack enlarging to 10 mm needs cycle 484 509 times, it account for 50.2% of the total propagation life. The fatigue crack propagation life of railway steel bridge is largely affected by environmental corrosion, and it is reduced by 79% compared with the fatigue crack propagation life without corrosion. The research results can provide a reference for predicting the development trend of fatigue crack, assessing the residual life of railway steel bridge and assessing the safety and operational capacity of the structure. 1 tab, 11 figs, 25 refs.

相似文献/References:

[1]李宇,朱晞,杨庆山,等.高墩大跨桥梁结构的脆弱性分析[J].长安大学学报(自然科学版),2012,32(01):0.
[2]高亮,刘健新,张丹,等.桁架桥主梁三分力系数试验[J].长安大学学报(自然科学版),2012,32(01):0.
[3]刘旭政,王丰平,黄平明,等.斜拉桥各构件校验系数的常值范围[J].长安大学学报(自然科学版),2012,32(01):0.
[4]尚维波,张春宁.高墩刚构桥系梁抗震分析[J].长安大学学报(自然科学版),2012,32(01):0.
[5]邬晓光,李冀弘,宋伟伟.基于改进响应面法的在役PC桥梁承载力可靠性[J].长安大学学报(自然科学版),2012,32(03):53.
　WU Xiao-guang,LI Ji-hong,SONG Wei-wei.Reliability of existing PC bridge based on improved response surface method[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):53.
[6]石雄伟,袁卓亚,马毓泉,等.钢板-混凝土组合加固预应力混凝土箱梁[J].长安大学学报(自然科学版),2012,32(03):58.
　SHI Xiong-wei,YUAN Zhuo-ya,MA Yu-quan,et al.Prestressed concrete box girder strengthened with comsposition of steel plate and concrete[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):58.
[7]李传习,陶 伟,董创文.斜交墩截面刚度与弯曲正应力[J].长安大学学报(自然科学版),2012,32(03):63.
　LI Chuan-xi,TAO Wei,DONG Chuang-wen.Sectional stiffness and bending normal stress of oblique pier[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):63.
[8]邓继华,邵旭东.带铰平面梁元几何非线性有限元分析[J].长安大学学报(自然科学版),2012,32(03):68.
　DENG Ji-hua,SHAO Xu-dong.Geometric nonlinear finite element analysis of plane beam element with hinge[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):68.
[9]蒲广宁,赵 煜,宋一凡.减梁增肋法加固空心板桥的力学性能[J].长安大学学报(自然科学版),2012,32(06):38.
　PU Guang-ning,ZHAO Yu,SONG Yi-fan.Mechanical properties of strengthening hollow slab bridge based on beam-reduction and rib-addition method[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):38.
[10]党 栋,贺拴海,周勇军,等.基于车辆统计数据的汽车荷载标准值取值与评估[J].长安大学学报(自然科学版),2012,32(06):44.
　DANG Dong,HE Shuan-hai,ZHOU Yong-jun,et al.Choosing and assessment for the standard of vehicle load based on vehicle statistical data[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):44.

更新日期/Last Update: 2018-04-03