| 无粘结部分预应力高强混凝土梁闭合弯矩计算 |
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| 引用本文： | 宋永发,王清湘,宋玉普.无粘结部分预应力高强混凝土梁闭合弯矩计算[J].大连理工大学学报,2000,40(3):348-350. |
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| 作者姓名： | 宋永发 王清湘 宋玉普 |
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| 作者单位： | 大连理工大学,土木工程系,辽宁,大连,116024 |
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| 基金项目： | 海岸及近海工程国家重点实验室基金资助项目 |
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| 摘 要： | 通过１１根无粘结部分预应力高强混凝土梁，研究了影响裂缝闭合的主要因素：预应力筋配筋率、非预应力筋配率、跨高比、荷载作用方式。用无粘结配筋指标βｐｃ和换算配筋率αｐρ这两个参数来反映对裂缝闭合弯矩的影响，应用名义拉应力建立了闭合弯矩计算公式；计算结果与试验结果吻合较好。
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| 关 键 词： | 高强混凝土 裂缝闭合 弯矩 部分预应力混凝土梁 |
Calculation of closed bending moments for unbonded partially prestressed concrete (PPC) beams with high-strength concrete |
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| SONG Yong-fa,WANG Qing-xiang,SONG Yu-pu.Calculation of closed bending moments for unbonded partially prestressed concrete (PPC) beams with high-strength concrete[J].Journal of Dalian University of Technology,2000,40(3):348-350. |
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| Authors: | SONG Yong-fa WANG Qing-xiang SONG Yu-pu |
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| Abstract: | Based on the experimental results of 11 unbonded partially prestressed concrete (PPC) beams with high strength concrete, the major factors which affect the closed bending moments of unbonded beams are studied.The effect of prestressed and non prestressed reinforcement on deflection in the mid span of unbonded beams and loading behavior is reflected with the ratio of unbonded reinforcement index to composite reinforcement index and the conversion reinforcement ratio. The formula of closed bending moments is obtained based on the nominal tension stress. The calculated results agree well with the experimental results. |
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| Keywords: | high strength concrete beam bending moments/unbonded crack closure |
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