CAJ | 학술논문

国内一些公路钢桥使用7～8年后，正交异性钢桥面板出现不同程度的疲劳问题。针对这些正交异性钢桥面板疲劳现象，国内外已进行了不少研究。但目前这些研究主要以疲劳试验为主，缺乏理论分析，还没有确定疲劳应力强度因子和顶板厚度与疲劳构造细节的关系等。将断裂力学理论和精细化数据模拟分析相结合，确定正交异性钢桥面板顶板与U肋焊接处的应力强度因子，明确不同顶板厚度、不同位置处的疲劳寿命和桥面板厚度与疲劳构造细节之间的关系等。
국내일사공로강교사용7～8년후，정교이성강교면판출현불동정도적피로문제。침대저사정교이성강교면판피로현상，국내외이진행료불소연구。단목전저사연구주요이피로시험위주，결핍이론분석，환몰유학정피로응력강도인자화정판후도여피로구조세절적관계등。장단렬역학이론화정세화수거모의분석상결합，학정정교이성강교면판정판여U륵한접처적응력강도인자，명학불동정판후도、불동위치처적피로수명화교면판후도여피로구조세절지간적관계등。
After some domestic steel bridges are put into service for 7~8 years, fatigue at different degrees occurs to orthotropic steel deck plates .Many researches have been conducted in allusion to these fatigue phenomena of orthotropic steel deck plates at home and abroad .However , as of now these researches focus on fatigue tests in shortage of theoretical analyses , and the relations between fatigue stress intensity factor , thickness of top plates and fatigue structure details have not been determined yet , etc.This paper combines fracture mechanics theory and fine data simulation analysis to determine the relations between top plates of orthotropic steel deck plates and stress intensity factor at welding location of U -ribs, and to make clear the relations between different thicknesses of top plates , fatigue lifetimes at different locations , thickness of deck plates and fatigue structure details , etc.