| 预制空心板实际预应力状态的研究 |
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| 引用本文： | 张军.预制空心板实际预应力状态的研究[J].中南公路工程,2012(2):68-71. |
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| 作者姓名： | 张军 |
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| 作者单位： | 湖南省浏醴高速公路建设开发有限公司,湖南长沙410329 |
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| 摘 要： | 针对施工中预制梁（板）实际上拱值比理论上拱值偏底较多的现象,对一片20m预应力空心板进行了静载试验。根据试验结果以及混凝土强度理论以确定理论开裂荷载,在此基础上进行实际预应力推算和上拱值计算,并按设计规范讨论了空心板正截面的抗裂能力。
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| 关 键 词： | 预应力构件 空心板 预应力状态 先简支后结构连续桥梁 |
Study on Practical Prestress Status of Precast Cored Slab |
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| ZHANG Jun.Study on Practical Prestress Status of Precast Cored Slab[J].Central South Highway Engineering,2012(2):68-71. |
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| Authors: | ZHANG Jun |
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| Institution: | ZHANG Jun(Hunan Liuli Expressway Construction and Development Co.Ltd,Changsha,Hunan 410329,China) |
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| Abstract: | For the phenomenon that the practical upward deflection values of precast beams（slabs）are less than theoretical ones,the static load test for a prestressed cored slab is performed.The theoretical cracking loads are determined according to the results of test and the strength theory of concrete.Based on these,the calculation on the practical prestresses and upward deflection values is carried out and the capacity of cracking resistance of the normal section of cored slabs is discussed. |
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| Keywords: | prestress member cored slab prestress status bridge construction |
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