摘要
宜昌市庙嘴长江大桥大江桥为250m+838m+215m的单跨简支钢板结合梁悬索桥。介绍了该桥上部结构设计,指出了影响板式加劲梁悬索桥抗风稳定性的主要因素,提出了改善抗风性能的相应措施。结果表明,这些措施提高了大江桥加劲梁的抗风稳定性,使其满足规范要求。大江桥主缆和吊索在国内首次全部采用镀锌铝合金高强钢丝。采用有限元程序对该桥进行静力计算,计算结果表明,各项指标均满足规范要求。
The Dajiang bridge of Miaozui Yangtze River Bridge in Yichang is a simply-supported suspension bridge with steel plate composite girder and span arrangement of 250m＋838m＋215m.Design of Dajiang bridge superstructure is introduced.The factors that affect the wind-resistance stability of the plate stiffening girder suspension bridge are indicated.And the corresponding improvement measures are put forward.Experimental results show that the wind-resistance stability of the stiffening girder of the Dajiang Bridge is improved by adopting these measures and meeting the requirements of specification.The steel wires of main cables and suspenders are first all coated with zinc-aluminum alloy in domestic.Finally,static effect of Dajiang Bridge is analyzed by using finite element program.The calculation results show that all checking indexes in the bridge meet the requirements of specification.
出处
《交通科技》
2015年第2期10-14,共5页
Transportation Science & Technology
关键词
悬索桥
板式加劲梁
锌铝合金镀层钢丝
suspension bridge
plate stiffening girder
zinc-aluminum alloy coated steel wire
