| 一种混凝土结构长期预应力损失计算方法 |
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| 引用本文： | 卢志芳,刘沐宇. 一种混凝土结构长期预应力损失计算方法[J]. 武汉理工大学学报, 2011, 0(7): 83-87 |
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| 作者姓名： | 卢志芳 刘沐宇 |
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| 作者单位： | 武汉理工大学道路桥梁与结构工程湖北省重点实验室; |
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| 基金项目： | 湖北省自然科学基金(2008CDB367); 中央高校基本科研业务费专项资金(2010-ZY-TJ-03) |
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| 摘 要： | 基于准确、快速抽样的拉丁超立方抽样法和按龄期调整的有效模量法,推导了同时考虑收缩徐变时变性和不确定性、及其与预应力筋应力松弛相互作用的预应力损失计算公式,形成了一种混凝土结构长期预应力损失计算方法。通过该方法对C50混凝土试验梁进行预应力损失计算,结果表明,试验梁长期预应力损失实测值均位于该方法计算的预应力损失置信区间的中部,论证了文中预应力损失方法的准确性和可靠性。
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| 关 键 词： | 混凝土桥梁 收缩徐变 预应力筋应力松弛 长期预应力损失 |
Long-time Prestress Losses Analysis Method for Concrete Structure |
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| LU Zhi-fang,LIU Mu-yu. Long-time Prestress Losses Analysis Method for Concrete Structure[J]. Journal of Wuhan University of Technology, 2011, 0(7): 83-87 |
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| Authors: | LU Zhi-fang LIU Mu-yu |
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| Affiliation: | LU Zhi-fang,LIU Mu-yu(Hubei Key Laboratory of Roadway Bridge & Structure Engineering,Wuhan University of Technology,Wuhan 430070,China) |
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| Abstract: | Prestress losses analysis method,account for time variation and uncertainty of shrinkage and creep,and interaction between which and prestress relaxation of tendon,is promoted based on Latin hypercube sampling method and age-adjusting effective modulus method,to form a calculation method for concrete structure long-term prestress losses.The analysis shows that the measures result of C50 prestress girder experimental model are located in the middle of calculated confidence interval for prestress losses,and t... |
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| Keywords: | concrete bridge shrinkage and creep prestress relaxation long-time prestress losses |
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