| 刚性悬索加劲钢桁梁桥施工阶段力学性能(英文) |
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| 引用本文： | 刘永健,刘剑,钟冠星,杨健.刚性悬索加劲钢桁梁桥施工阶段力学性能(英文)[J].交通运输工程学报,2009,9(3). |
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| 作者姓名： | 刘永健 刘剑 钟冠星 杨健 |
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| 作者单位： | 刘永健,刘剑,杨健(长安大学,桥梁与隧道陕西省重点实验室,陕西,西安,710064);钟冠星(东莞市公路桥梁开发建设总公司,广东,东莞,523010)
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| 基金项目： | New Century Excellent Talents in University，Science and Technology Project of West Traffic Construction ofChina，Science and Technology Project of Department of Communications of Guangdong Province |
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| 摘 要： | 采用空间有限元方法对刚性悬索加劲钢桁梁桥的施工全过程进行了仿真分析,通过变化边界条件与施加节点强制位移分别模拟结构体系转换和内力调整,采用释放纵梁一端的纵向刚度来模拟纵梁长圆孔的影响,对比了6种主要工况下结构的内力和位移.分析结果表明:通过体系转化和内力调整,能有效地使刚性悬索与钢桁梁共同受力;横、纵向内力调整能使结构的中边桁与中边跨的内力差异减小到5%以内;在纵梁两端设置长圆孔能有效避免其过早参与纵向受力,仅使整体结构的内力与挠度增加10%左右,但使得纵梁与横梁的最大组合压应力分别从-271.1、-505.8 MPa降低到-63.0、-178.0 MPa,小于材料的容许应力210 MPa.
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| 关 键 词： | 桥梁工程 刚性悬索 钢桁梁 体系转换 内力调整 |
Mechanical behavior of steel truss bridge stiffened with rigid cables in construction stage |
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| LIU Yong-jian,LIU Jian,ZHONG Guan-xing,YANG Jian.Mechanical behavior of steel truss bridge stiffened with rigid cables in construction stage[J].Journal of Traffic and Transportation Engineering,2009,9(3). |
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| Authors: | LIU Yong-jian LIU Jian ZHONG Guan-xing YANG Jian |
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| Institution: | 1.Key Laboratory for Bridge and Tunnel of Shaanxi Province;Chang'an University;Xi'an 710064;Shaanxi;China;2.Dongguan Road and Bridge Development Construction Corporation;Dongguan 523010;Guangdong;China |
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| Abstract: | 3D finite element numerical method was used to simulate the whole construction processes of steel truss bridge stiffened with rigid cables.Changing boundary conditions and imposing compulsory displacements on some nodes were applied to simulate system transformation and internal force adjustment respectively.Relaxing the longitudinal stiffness of an end of longitudinal girder was applied to simulate the effect of slotted holes.The internal forces and deflections were compared under six main conditions.Analy... |
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| Keywords: | bridge engineering rigid cable steel truss system transformation internal forceadjustment |
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