| 劲性骨架混凝土拱桥施工稳定性分析 |
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| 引用本文： | 王业飞,蔡金标,杨国静.劲性骨架混凝土拱桥施工稳定性分析[J].桥梁建设,2011(3). |
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| 作者姓名： | 王业飞 蔡金标 杨国静 |
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| 作者单位： | 1. 中铁二院工程集团有限责任公司,四川成都,610031
2. 浙江大学土木工程系,浙江杭州,310027 |
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| 摘 要： | 天工大桥主桥为一座劲性骨架钢筋混凝土拱桥。为了研究该桥施工阶段的稳定性和风荷载、预应力对稳定系数的影响,通过建立以实体单元+梁单元为主的ANSYS三维有限元模型,模拟施工过程中钢管混凝土截面和混凝土箱形截面的分次浇筑过程。根据计算结果可知:该桥在施工过程中的稳定系数均大于4,满足规范要求;风荷载在拱肋截面分期浇筑成形阶段对稳定系数影响较大,因此,根据计算结果增设临时横撑;纵、横向预应力对稳定系数的影响均较小,分析时可考虑纵向系杆力,忽略横向预应力。
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| 关 键 词： | 拱桥 劲性骨架 桥梁施工 有限元法 稳定分析 |
Analysis of Stability of Steel-Frame Reinforced Concrete Arch Bridge at Construction Stage |
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| WANG Ye-fei,CAI Jin-biao,YANG Guo-jing.Analysis of Stability of Steel-Frame Reinforced Concrete Arch Bridge at Construction Stage[J].Bridge Construction,2011(3). |
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| Authors: | WANG Ye-fei CAI Jin-biao YANG Guo-jing |
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| Affiliation: | WANG Ye-fei1,CAI Jin-biao2,YANG Guo-jing1(1.China Railway Tieeryuan Engineering Group Co.,Ltd.,Chengdu 610031,China,2.Department of Civil Engineering,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | The main bridge of the Tiangong Bridge is a steel-frame reinforced concrete arch bridge.To study the stability,wind load and influence of prestressing on the stability factors of the bridge at construction stage,the three-dimensional finite element model of ANSYS mainly used with solid and beam elements was established and the concreting of the concrete-filled steel tube sections and concrete box sections of the bridge in times in the construction process was simulated.It is known from the results of calcul... |
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| Keywords: | arch bridge steel-frame bridge construction finite element method stability analysis |
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