| 无粘结部分预应力高强混凝土梁变形计算 |
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| 引用本文： | 宋永发,宋玉普.无粘结部分预应力高强混凝土梁变形计算[J].大连理工大学学报,1999,39(4):552-557. |
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| 作者姓名： | 宋永发 宋玉普 |
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| 作者单位： | 大连理工大学土木工程系 |
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| 基金项目： | 海岸及近海工程国家重点实验室资助 |
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| 摘 要： | 通过２６根无粘结部分预应力高强混凝土梁试验，研究了影响无粘结梁变形的主要因素：预应力筋配筋率、非预应力筋配筋率、跨高比、荷载作用方式，将预应力筋和非预应力筋对于无粘 最大挠度的影响，用无粘结配筋指标和综合配筋指标之比η和换算配筋配筋αｐρ这两个参数来反映，并且采用与国内有关规范相一致的直接双直线法，在单调荷载作用下无粘结部分预应力高强混凝土梁变表计算基础上，建立了任意荷载作用下的无粘结部分尖力高强
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| 关 键 词： | 高强混凝土 梁 预应力混凝土 变形 |
Calculation of deformation for unbonded partially prestressed concrete (PPC) beams with high strength concrete |
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| SONG\ Yong fa,\ SONG Yu pu,\ WANG Qing xiang.Calculation of deformation for unbonded partially prestressed concrete (PPC) beams with high strength concrete[J].Journal of Dalian University of Technology,1999,39(4):552-557. |
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| Authors: | SONG\ Yong fa \ SONG Yu pu \ WANG Qing xiang |
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| Abstract: | Based on the experimental results of 26 unbonded partially prestressed concrete beams with high strength concrete, the main factors which affect the deformation of unbonded beams is studied, including prestressed and nonprestressed reinforcement and ratio of beam span to depth and types of loading. The effect of prestressed and nonprestressed reinforcement upon maximum deflection in the mid span of unbonded beams is reflected with the ratio of unbonded reinforcement index to composite method in accordance with the present codes, the deformation formula of unbonded PPC beams with high strength concrete under arbitrary loading is obtained based on that under monotonic loading .The calculating results agree well with experimental results. |
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| Keywords: | high strength concrete beams supports rigidity deflection/cycle loading unbonded |
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