| 预应力混凝土结构的应变控制分析 |
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| 引用本文： | 吴迅,贾留锁,王艺桥.预应力混凝土结构的应变控制分析[J].石家庄铁道学院学报(社会科学版),2011(1):31-34. |
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| 作者姓名： | 吴迅 贾留锁 王艺桥 |
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| 作者单位： | 同济大学 桥梁工程系,上海 200092;同济大学 桥梁工程系,上海 200092;同济大学 桥梁工程系,上海 200092 |
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| 摘 要： | 现在,越来越多的预应力混凝土箱梁桥在腹板处出现裂缝。然而这些裂缝,根据规范规定的在最不利荷载组合作用下是不应该出现的。针对这一现象,试图从应变超限的观点去解释,并对混凝土时变效应导致的应变扩大进行了分析。利用大型有限元软件ANSYS建立变高度混凝土箱梁模型,针对实际工程中竖向预应力容易损失的状况,分析了竖向预应力一定损失度状况下的箱梁腹板应力及应变状况。
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| 关 键 词： | 预应力混凝土 应变控制 广义胡克定律 ANSYS |
| 收稿时间： | 2010/4/23 0:00:00 |
Study on Strain Control of Prestressed Concrete Structure |
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| Authors: | Wu Xun Jia Liusuo and Wang Yiqiao |
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| Institution: | Department of Bridge Engineering, Tongji University, Shanghai 200092,China;Department of Bridge Engineering, Tongji University, Shanghai 200092,China;Department of Bridge Engineering, Tongji University, Shanghai 200092,China |
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| Abstract: | Nowadays, more and more pre-stressed concrete box girder bridges crack on the web plate. However these cracks, even under the most disadvantageous load-combination function of the Code, should not appear. In view of this phenomenon, this article adopts the viewpoint that the main factor leading to crack is the strain instead of stress, and the strain expansion out of creep is analyzed. By using the software ANSYS, the stress and strain condition of web plate is analyzed further. |
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| Keywords: | prestressed concrete strain control generalized Hooke law ANSYS |
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