| 体外预应力简支混凝土梁基频的理论与实验研究 |
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| 引用本文： | 张耀庭,张长跑. 体外预应力简支混凝土梁基频的理论与实验研究[J]. 华中科技大学学报(城市科学版), 2005, 22(1): 13-15,22 |
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| 作者姓名： | 张耀庭 张长跑 |
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| 作者单位： | 华中科技大学,土木工程与力学学院,湖北,武汉,430074 |
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| 基金项目： | 教育部博士点基金资助项目(20030487016). |
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| 摘 要： | 利用动力学原理推导了体外预应力简支混凝土梁的自振频率计算公式,进行了6根不同布筋方式的体外预应梁的动测试验,理论值与实测值比较发现,计算结果与实测值在张拉预应力阶段的最大误差是12.67%,在加载阶段二者间的最大误差亦在30%以内,还讨论了该公式的主要影响因素及实用性.
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| 关 键 词： | 体外预应力简支混凝土梁 自振频率 动测试验 |
| 文章编号： | 1672-7037(2005)01-0013-03 |
Theoretical and Experimental Study on the Natural Frequency of Externally Prestressed Simply Supported Concrete Beam |
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| ZHANG Yao-ting,ZHANG Chang-pao. Theoretical and Experimental Study on the Natural Frequency of Externally Prestressed Simply Supported Concrete Beam[J]. Journal of Huazhong University of Science and Technology, 2005, 22(1): 13-15,22 |
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| Authors: | ZHANG Yao-ting ZHANG Chang-pao |
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| Affiliation: | ZHANG Yao-ting~1ZHANG Chang-pao~1 |
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| Abstract: | A formula for calculating frequency of externally prestressed simply supperted concrete beam is derived from classical frequency equation with considering the influence of axial force and bending moment. Strengthening of six beams with simply supported ends by externally prestressing are experimentally investigated. The comparison of theoretical and the experimental results shows that the maximal percentage error between the numerical and the tested is 12.67% in drawing the prestress tendons. In applying load level, it is within 30%. The main influences and the practical feasibility about the formula are discussed. |
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| Keywords: | externally prestressed simply supported concrete beam natural frequency dynamic test |
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