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大跨度铁路连续钢桁梁预拱度设置研究

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摘要 大跨度铁路连续钢桁梁结构复杂,采用传统起拱方法设置预拱度需进行多次试算调整。在升降温法基础上引入改进粒子群算法,利用Midas Civil建立有限元模型,在Matlab中以节点竖向位移为约束条件进行大跨度铁路连续钢桁梁预拱度设置研究。研究表明:在升降温法中引入改进粒子群算法进行钢桁梁起拱计算,可在预拱度满足允许偏差情况下将起拱引起的支点附加反力及构件次内力优化至较小值,且可避免传统方法需多次人工试算的麻烦。该方法也可应用于含钢桁梁结构的组合体系中。
作者 林焕杰
出处 《四川水泥》 2022年第11期250-252,共3页 Sichuan Cement
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