FATIGUE CRACKS OF WELDS AND THEIR REPAIR IN STEEL SPANS OF RAILROAD BRIDGE
The inspection of several dozen bridge structures (over 80) along the Wroclaw-Poznan railroad line whose aim was to determine the feasibility of adapting this line to the running of trains at the high speed of 140～160km/h revealed numerous cracks in short steel bridges having the span of 12～18m, particularly at the places of various joints. This paper shows several examples of such cracks. An attempt is made to explain their nature and genesis. Also several ways of repairing effectively this kind of dangerous damage to bridge structures are demonstrated. A description of the weld cracks, discovered during expertise and field test work, in structural components of the wind bracings in a steel three-span railroad bridge with simply-supported spans and an open deck situated on the Wroclaw-Poznan railroad line is presented. The probable causes of the cracks and the character of the latter as well as possible methods of repairing this damage, with stress put on the correct shaping of the geometry of the structuralmembers, are discussed. The conclusions that emerge from these considerations are applicable to similar cases of fatigue damage to structural components of steel bridges.
Railroad bridge crack weld gusset plate wind brace experimental investigation repairing method
Zbigniew Zee Manko
Institute of Civil Engineering, Wroclaw University of Technology, Wroclaw, Poland zbigniew.
国际会议
上海
英文
832-842
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）