| 混凝土箱梁的非线性分析 |
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| 引用本文： | 杨国平,车惠民.混凝土箱梁的非线性分析[J].西南交通大学学报,1990(2):54-62. |
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| 作者姓名： | 杨国平 车惠民 |
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| 基金项目： | 国家教委资助博士点研究课题 |
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| 摘 要： | 本文用一种新的高效壳体单元离散预应力混凝土箱梁，在较稀的网格划分下，考虑与时间无关的非线性因素，分析了预应力混凝土箱梁的结构行为。所涉及的非线性特性有：混凝土材料的正交各向异性本构；由混凝土开裂或压碎及钢筋屈服所引起的非线性。还考虑了混凝土开裂后的软化性质，计算结果与实验梁的量测值吻合较好。
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| 关 键 词： | 预应力混凝土箱梁 有限元 非线性 结构行为 软化特性 桥梁 |
Nonlinear Analysis of Concrete Box Girders |
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| Yang Guoping,Che Huimin.Nonlinear Analysis of Concrete Box Girders[J].Journal of Southwest Jiaotong University,1990(2):54-62. |
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| Authors: | Yang Guoping Che Huimin |
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| Institution: | Yang Guoping;Che Huimin |
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| Abstract: | The structural behaviour of prestressed concrete box girders is analyzed by using a high efficient flat shell element to discrete the girders with a coarse mesh, considering the time-indelendent material nonlinearities of concrete, such as the biaxial ortho- tropic model, damage and softening in tension zone of concrete, by means of the concrete fracture mechanics parameters. Analy- tical results agree well with those from experiments. |
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| Keywords: | PC box girder FEM nonlinearity structural behaviour softening |
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