| 大跨桁式钢管混凝土拱桥空间非线性有限元分析 |
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| 引用本文： | 张阳,邵旭东,蔡松柏,胡建华.大跨桁式钢管混凝土拱桥空间非线性有限元分析[J].中国公路学报,2006,19(4):65-70. |
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| 作者姓名： | 张阳 邵旭东 蔡松柏 胡建华 |
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| 作者单位： | 湖南大学土木工程学院 湖南长沙410082(张阳，邵旭东)，湖南师范大学资源与环境科学学院 湖南长沙410081(蔡松柏)，湖南省交通规划勘察设计院 湖南长沙410008(胡建华) |
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| 基金项目： | 国家西部交通建设科技项目;浙江省湖州市自然科学基金 |
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| 摘 要： | 采用共旋坐标法导出钢管混凝土杆单元在大位移、大应变条件下的空间几何、材料非线性耦合的单元切线刚度矩阵;提出了在n 1维荷载-位移空间Rn 1中求解非线性有限元方程组的位移增量法迭代格式,该格式保留了迭代刚度矩阵的部分带状性能;在此基础上编制相应的有限元程序NSTSAP(几何非线性)和NSTSAP2(双重非线性)。通过与湖南茅草街大桥拱顶节段试验模型进行对比分析发现:该方法能较好地反映桁式拱肋钢管混凝土拱桥空间受力的非线性性能。
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| 关 键 词： | 桥梁工程 钢管混凝土拱桥 共旋坐标法 几何非线性 材料非线性 |
| 文章编号： | 1001-7372（2006）04-0065-06 |
| 收稿时间： | 2005-09-08 |
| 修稿时间： | 2005年9月8日 |
Spatial Nonlinear Finite Element Analysis for Long-Span Trussed CFST Arch Bridge |
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| ZHANG Yang , SHAO Xu-dong , CAI Song-bai , HU Jian-hua.Spatial Nonlinear Finite Element Analysis for Long-Span Trussed CFST Arch Bridge[J].China Journal of Highway and Transport,2006,19(4):65-70. |
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| Authors: | ZHANG Yang SHAO Xu-dong CAI Song-bai HU Jian-hua |
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| Institution: | 1. School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. School of Resource and Environment Science, Hunan Normal University, Changsha 410081, Hunan, China; 3. Communications Planning, Survey and Design Institute of H unan Province, Changsha 410008, H unan, China |
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| Abstract: | Tangent stiffness matrix for spatial concrete filled steel tubular(CFST) pole element of geometric nonlinearity coupled with material nonlinearity under large displacement and large strain which was deduced with co-rotational coordinate method was proposed.Iteration scheme for increment displacement method was used in solution of nonlinear equations in standard nonlinear FEM.Authors expanded the solution procedure of nonlinear FEM equations onto the load and displacement space of R~(n 1) and partially retained the band characteristic of the iteration stiffness matrix.Based on the above formulation,the corresponding computer geometric nonlinear program NSTSAP and geometric nonlinear coupled with material nonlinear program NSTSAP2 were developed.Computation of the arch ribs segment model of Hunan Maocaojie Bridge shows that the procedure can reflect preferably the nonlinear characteristics of arch bridge with concrete filled steel tube trussed arch ribs during bearing spatial forces. |
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| Keywords: | bridge engineering CFST arch bridge co-rotational coordinate method geometric nonlinearity material nonlinearity |
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