中国铁道科学2017，Vol.38Issue(3)：40-46,7.DOI:10.3969/j.issn.1001-4632.2017.03.06
沪通长江大桥Q500qE钢的适用性研究
Study on Applicability of Q500qE Steel for Hutong Yangtze River Bridge
摘要
Abstract
To meet the construction requirements of Hutong Yangtze River Bridge,the highway-railway cable-stayed bridge with the longest span in the world,the tension,low temperature toughness and antibreaking of QS00qE steel,the processing technology of cutting,welding and heat correcting of distortion,as well as structural safety reserve,fatigue resistance and the stability reduction factor of compression bar were studied from three aspects,including the basic properties of base metal,the manufacturing performance and design parameters.Results show that QS00qE steel has good plasticity and high yield strength.QS00qE steel plate with the thickness of 16 mm and 32 mm has good anti-breaking capacity from 11 to-50 ℃ ambient temperature.The low-temperature fracture resistance of 44 mm and 60 mm thick QS00qE steel plate decreases when the temperature is below-40 ℃.QS00qE steel has good performance of flame cuttingand welding process.Both the apparent and internal quality of butt weld,penetration fillet weld,angle fillet weld and T-shape fillet weld can meet quality requirements.The welding orthopedic temperature of Q500qE steel should not exceed 750 ℃,and the security reserve is equivalent to common steel when the yield strength ratio is less than 0.86.The fatigue design of Q500qE steel structure can use the design index of fatigue resistance in existing codes.The stability reduction factor of QS00qE steel compression bar is recommended based on the research ideas of relevant specifications of various countries and finite element calculation results.关键词
公铁两用钢桥/Q500qE钢/防断性能/焊接性能/热矫性能/疲劳抗力/稳定折减系数Key words
Highway-railway steel bridge/QS00qE steel/Anti-breaking property/Welding performance/Thermal correction property/Fatigue resistance/Stable reduction factor分类
交通工程引用本文复制引用
闫志刚,赵欣欣,徐向军..沪通长江大桥Q500qE钢的适用性研究[J].中国铁道科学,2017,38(3):40-46,7.基金项目
中国铁路总公司科技研究开发计划重大项目(2014G004-B) （2014G004-B）
