| Nonlinear Stability Analysis of Long-Span Continuous Rigid Frame Bridge with Thin-Wall High Piers |
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| 作者姓名： | LiLi PengYuancheng LongXiaohong LiaoPing |
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| 作者单位： | SchoolofCivilEngineeringandMechanics,I-tuazhongUniversityofScienceandTechnology,Wuhan430074,China |
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| 基金项目： | theFoundationforResearchProjectofChinaCommunicationsSecondHighwaySurveyDesignandResearchIn stitute. |
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| 摘 要： | By utilizing the current finite element program ANSYS, two types of finite element models (FEM), the beam model (BM) and shell model (SM), are established for the nonlinear stability analysis of a practical rigid frame bridge-Longtanhe Great Bridge. In these analyses, geometrical and material nonlinearities are simultaneously taken into account. For geometrical nonlinearity, updated LagrangJan formulations are adopted to derive the tangent stiffness matrix. In order to simulate the nonlinear behavior of the plastic hinge of the piers, the multi-lines spring element COMBIN39 is used in the SM while the bilinear rotational spring element COMBIN40 is employed in the BM. Numerical calculations show that satisfying results can be obtained in the stability analysis of the bridge when the double coupling nonlinearity effects are considered. In addition, the conclusion is significant for practical engineering.
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| 关 键 词： | 薄墙码头 刚架桥 有限元 非线性稳定性 地质勘测 |
Nonlinear Stability Analysis of Long-Span Continuous Rigid Frame Bridge with Thin-Wall High Piers |
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| LiLi PengYuancheng LongXiaohong LiaoPing.Nonlinear Stability Analysis of Long-Span Continuous Rigid Frame Bridge with Thin-Wall High Piers[J].Journal of China University of Geosciences,2005,16(1):72-78. |
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| Authors: | Li Li Peng Yuancheng Long Xiaohong LIAO Ping |
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| Abstract: | By utilizing the current finite element program ANSYS, two types of finite element models (FEM), the beam model (BM) and shell model (SM), are established for the nonlinear stability analysis of a practical rigid frame bridge-Longtanhe Great Bridge. In these analyses, geometrical and material nonlinearities are simultaneously taken into account. For geometrical nonlinearity, updated Lagrangian formulations are adopted to derive the tangent stiffness matrix. In order to simulate the nonlinear behavior of the plastic hinge of the piers, the multi-lines spring element COMBIN39 is used in the SM while the bilinear rotational spring element COMBIN40 is employed in the BM. Numerical calculations show that satisfying results can be obtained in the stability analysis of the bridge when the double coupling nonlinearity effects are considered. In addition, the conclusion is significant for practical engineering. |
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| Keywords: | thin-wall high pier rigid frame bridge finite element analysis nonlinear stability |
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