| 考虑竖向预应力扩散影响的箱梁腹板预压应力计算 |
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| 引用本文： | 刘钊,李鹏.考虑竖向预应力扩散影响的箱梁腹板预压应力计算[J].公路交通科技,2004,21(12):54-57. |
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| 作者姓名： | 刘钊 李鹏 |
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| 作者单位： | 东南大学土木工程学院,江苏,南京,210096 |
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| 摘 要： | 竖向预应力筋对箱梁腹板产生的竖向压应力计算,关系到腹板主拉应力计算和抗裂问题,现行桥梁设计规范有关预压应力的计算公式没有考虑预应力在锚下的扩散。本文从弹性理论的解析解出发,讨论竖向预应力下考虑应力扩散的箱梁腹板压应力计算问题,最后给出竖向预应力筋合理间距和扩散角的计算公式。
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| 关 键 词： | 箱梁 竖向预应力 应力扩散 主拉应力 |
| 文章编号： | 1002-0268(2004)12-0054-04 |
| 修稿时间： | 2003年10月9日 |
Calculation of the Compressed Stress in Box Beam Web by Vertical Prestressing Forces in Consideration of Stress Diffusion |
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| LIU Zhao,LI Peng.Calculation of the Compressed Stress in Box Beam Web by Vertical Prestressing Forces in Consideration of Stress Diffusion[J].Journal of Highway and Transportation Research and Development,2004,21(12):54-57. |
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| Authors: | LIU Zhao LI Peng |
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| Abstract: | Compressed stress by vertical prestressing tendons within the web of box beam has much to do with the web's principal tensile stress and cracking problem.In current Chinese specification,however,the calculation of such compressed stress does not consider the prestressing diffusion phenomena.Based on the analytical solution of elasticity theory,this paper discusses the calculation method for the vertical compressed stress considering the prestress diffusion.The formulae for the rational distance between vertical tendons and for stress diffusion angle are suggested in the end. |
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| Keywords: | Box beam Vertical prestressing Stress diffusion Principal tensile stress |
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