| 预应力箱梁底板混凝土崩裂成因分析 |
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| 引用本文： | 王蒂,庞志华.预应力箱梁底板混凝土崩裂成因分析[J].混凝土,2008(11). |
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| 作者姓名： | 王蒂 庞志华 |
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| 作者单位： | 长安大学,桥梁与隧道陕西省重点实验室,陕西,西安,710064 |
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| 摘 要： | 分析了预应力混凝土箱梁底板崩裂的成因,利用有限元程序,对底板崩裂的破坏机理进行了模拟分析.计算结果表明,预应力径向力是导致梁底崩裂的主要因素;箱梁底板由于压应力、施工误差、曲率效应、泊松效应等综合因素导致局部应力集中,压曲临界应力下降,最终失稳破坏.
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| 关 键 词： | 桥梁工程 预应力箱梁 底板崩裂 成因分析 |
Causes of bursting on bottom slab of prestressed concrete box beam bridge |
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| WANG Di,PANG Zhi-hua.Causes of bursting on bottom slab of prestressed concrete box beam bridge[J].Concrete,2008(11). |
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| Authors: | WANG Di PANG Zhi-hua |
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| Affiliation: | Key Laboratory for Bridge and Tunnel of Shanxi Province;Chang'an University;Xi'an;710064;China |
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| Abstract: | Some causes of bursting on bottom slab of prestressed concrete box beam bridge was studied.Using finite element analysis software ANSYS,the finite element analysis model of PC box beam was established.Failure reasons were analyzed.The results indicated that the prestressed radial force causes the primary factor which the bursting cracks;Because of the compressed stress,construction error,curvature effect,Poisson ef- fect and so on,the local stress is centralized,critical stress drops with final jitter destr... |
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| Keywords: | bridge engineering prestressed concrete box beam bursting on bottom slab origin analysis |
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