[1]吕彭民宋年波李大涛.正交异性桥面板横隔板圆弧过度处剪切疲劳强度实验研究[J].郑州大学学报(工学版),2015,36(02):62-66.[doi:10.3969/ j. issn.1671 -6833.2015.02.014]
　LV Peng-min,SONG Nian-b,Ll Da-tao.Experimental Study of Shear Fatigue Strength for theOrthotropic Deck Diaphragm Arc Transition[J].Journal of Zhengzhou University (Engineering Science),2015,36(02):62-66.[doi:10.3969/ j. issn.1671 -6833.2015.02.014]
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正交异性桥面板横隔板圆弧过度处剪切疲劳强度实验研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
36
期数:
2015年02期
页码:
62-66
栏目:
出版日期:
2015-04-30

文章信息/Info

Title:
Experimental Study of Shear Fatigue Strength for theOrthotropic Deck Diaphragm Arc Transition
作者:
吕彭民1宋年波2李大涛3
长安大学道路施工技术与装备教育部重点实验室，陕西西安710064
Author(s):
LV Peng-min; SONG Nian-b; Ll Da-tao
Key Laboratory Road Construction’Technology and Equipment,Ministry of Education,Chang’ an University,Xi’ an 710064,China
关键词:
正交异性钢桥﹔横隔板圆弧过渡处﹔剪切疲劳破坏; 疲劳试验﹔有限元分析; 应力测试
Keywords:
orthotropic steel bridge ; diaphragm arc transition;  shear fatigue failure;  fatigue test;  finite ele-ment analysis; stress test
分类号:
U443.3
DOI:
10.3969/ j. issn.1671 -6833.2015.02.014
文献标志码:
A
摘要:
为了研究正交异性桥面板横隔板圆弧过渡处的疲劳特性,本文以九江长江大桥实际结构为例制作了横隔板与U型肋局部构造细节疲劳试验试样,实验结果发现13个试样中有8个试样疲劳裂纹发生在横隔板与U型肋焊缝处,而有5个试样疲劳裂纹发生在横隔板母材圆弧过渡处,说明横隔板圆弧过渡处为疲劳破坏的危险部位之一.有限元分析与应力测试表明,该处为压应力状态区域,而剪切应力较大,其疲劳失效形式为剪切疲劳破坏,通过将实验数据与欧洲规范Eurocode3进行比较,该部位满足容许剪切应力幅值为100 MPa的AT -N曲线方程.该研究结果可为正交异性桥面构造细节强度设计和寿命评估提供参考.
Abstract:
In order to study the fatigue characteristics on the diaphragm arc transition for orthotropic bridgedeck,Jiujiang Yangtze River bridge was taken as an example,and the fatigue test specimens of the diaphragmand U rib local structural detail were made.Experimental results showed that 8 samples fatigue crack occurredin the diaphragm with U rib welds in 13 samples,and 5 samples fatigue crack occurred in the diaphragm aretransitional area,which illustrated that the diaphragm arc transitional area is one of the dangerous places of thefatigue failure. Finite element analysis and stress tests all indicated that this region is in the compressive stressstate,but the shear stress is very large,and the fatigue failure belongs to shear fatigue failure.Comparing theexperimental data with European standard Eurocode3,we can find it meets the T -N curve equation of the al-lowable shear stress amplitude for 100 MPa. The results of this study can provide reference for the strength de-sign and life assessment on the orthotropic deck structure details.
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