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Steel Truss Bridge Design base on Improved Beam-Board Combined Model
Author(s): 
Pages: 69-71
Year: Issue:  6
Journal: Railway Investigation and Surveying

Keyword:  钢桁架桥改进梁板结合模型有限元设计;
Abstract: 以蒙华煤运铁路三门峡至荆门段72 m简支下承式钢桁架梁桥为背景,指出传统梁板结合有限元模型采用刚臂方式连接虚梁和桥面系所产生的问题,并对其进行改进,提出改进梁板结合有限元模型。将两种模型在静活载作用下的杆件应力与真实情况进行对比。结果表明:传统梁板结合有限元模型的约束形式使桥面系刚度大于真实情况,造成计算出的杆件应力偏小,而改进后的梁板结合有限元模型没有增大桥面系刚度,计算出的杆件应力也与真实值吻合。
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