Abstract：Research purposes:As steel bridges are becoming more heavy － loaded and integrative，many complicated structures that their nominal stress can not be identified and their details can not corresponded with the existing design codes have happened in the steel bridge structure． In practice，the prototypical fatigue tests are usually done to validate these structures． However，the fatigue tests need long time and high cost and it restricts the fast and wide application of the fatigue test to validate the details of these structures． In order to accurately evaluate the fatigue behaviours of these details of the complicated structure，the study was done on the application of the hot spot stress in evaluating the bridge fatigue．
Research conclusions:The analysis of the concentration factors of the hot spot stress of many kinds of joint was made and the shs － N curve of the hot spot stress for checking the steel bridge fatigue was deduced by using the concentration factors of the hot spot stress． The comparison of the fatigue strength of nominal stress of the many kinds of structure details stipulated in BS5400 with the deduced fatigue strength of hot spot stress showed the deduced fatigue strength of hot spot stress was obviously less than the discreteness obtained with the nominal stress method． So the hot spot stress method is available for bridge construction．
王亚飞;徐海鹰. 热点应力法进行钢桥疲劳检算[J]. 铁道工程学报, 2012, 29(9): 49-52.
WANG Ya － fei，XU Hai － ying. Check of Steel Bridge Fatigue with Hot Spot Stress Method. 铁道工程学报, 2012, 29(9): 49-52.
China Classification Society． CCS Guidance Documents － Guidelines for the Fatigue Strength of Ship Structure ［Z］． Beijing: China Communications Press，2007．
Wang Binjie． Research on Hot Spot Stress Approach of Fatigue Evaluation and Application for High Speed Car ［D］．Beijing: Beijing Jiaotong University，2008．
Zhou Zhangyi，Li Fu． Study on Fatigue Analysis of Welded Toes of Plate Structures Using Hot Spot Stress Method Based on Surface Extrapolation［J］．Journal of the China Railway Society，2009(5) : 90－96．
Jia Fayong， Huo Lixing， Zhang Yufeng，etc． Key Influence Factors in Hot Spot Stress FEM Analysis［J］． Transactions of the China Welding Institution，2003(3) : 27－30．
Jia Fayong，Huo Lixing，Wu Bing，etc． Evaluation on Fatigue Strength of Duplex Stainless Steel Welded Joints by Hot Spot Stress［J］． Journal of Tianjin University， 2004(11) : 1014－1017．
Qiao Jinfei，Li Fengqin． Study and Design of Integral Joints and Detailed Structures of Steel Truss Girder ［J］． Journal of Railway Engineering Society，2009(8) : 68－72．
Zhang Qiwei， Zhang Pengfei． Hot Spot Stress Concentration Factor for Welded Joints in Steel Orthotropic Decks［J］． Journal of Tongji University ( Natural Science) ，2010(10) :1428－1433．
Zhou Zhangyi，Li Fu． Study on Fatigue Analysis of Welded Toes of Plate Structures Using Hot Spot Stress Method Based on Surface Extrapolation ［J］． Journal of the China Railway Society，2009(5) : 90－96．
Wang Guobo，Xie Weiping，Yu Yanli． Fatigue Analysis of Cast Steel Welded Joint under Dynamic Load of High Speed Train［J］． Journal of Vibration and Shock，2011 (9) :55－58．
Chen Youfang， Jin Qiudong， Zhang Shaoxiong． Research of Ship Fatigue Strength Assessment with Hot Stress Method ［J］． Ship ＆ Ocean Engineering，2010 (2) :5－7．
2012, Vol. 29 
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