| Natural Frequency of Full-Prestressed Concrete Beam |
| |
| 作者姓名： | 张耀庭 李瑞鸽 |
| |
| 作者单位： | School of Civil Engineering and Mechanics Huazhong University of Science and Technology，School of Civil Engineering and Mechanics，Huazhong University of Science and Technology，Civil Engineering Department，Pingdingshan Institute of Technology，Pingdingshan 467001，China，Wuhan 430074，China，Wuhan 430074，China |
| |
| 基金项目： | 国家自然科学基金;华中科技大学校科研和教改项目 |
| |
| 摘 要： | Dynamic tests of three bonded and two unbonded full-prestressed concrete beams were carried out.The purpose was to seek the relation between prestressing force and natural frequency.Test results indicate that the frequency of prestressed concrete(PSC)beam increases with the increase in prestressing force approximately.The results are different from the dynamic characteristics of isotropic material beam subjected to compressive axial force which were put forward by Clough et al.The reason is that the beams were considered as isotropic,homogeneous,linear elastic material in the traditional analysis method.However,more accurate results are required in the analysis of frequency of PSC beam.The constitutive mode of PSC member is analyzed based on microstructure of concrete in this paper.The orthotropic linear elastic mode is used to analyze the relation between dynamic frequency and prestressing force of concrete beam,at the same time the equivalent stiffness of prestressed tendon relating to the prestressing force is added to the bending deformation stiffness of the beam.The analytical value agrees well with the test result,indicating that the current analysis method in this paper is feasible to full-prestressed concrete beam.
|
| 关 键 词： | 预应力混凝土梁 自然频率 各向异性材料 建筑材料 |
| 修稿时间： | 2007-07-16 |
Natural Frequency of Full-Prestressed Concrete Beam |
| |
| ZHANG Yaoting,LI Ruige.Natural Frequency of Full-Prestressed Concrete Beam[J].Transactions of Tianjin University,2007,13(5):354-359. |
| |
| Authors: | ZHANG Yaoting LI Ruige |
| |
| Institution: | 1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China
2. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;Civil Engineering Department, Pingdingshan Institute of Technology, Pingdingshan 467001, China |
| |
| Abstract: | Dynamic tests of three bonded and two unbonded full-prestressed concrete beams were carried out.The purpose was to seek the relation between prestressing force and natural frequency.Test results indicate that the frequency of prestressed concrete(PSC)beam increases with the increase in prestressing force approximately.The results are different from the dynamic characteristics of isotropic material beam subjected to compressive axial force which were put forward by Clough et al.The reason is that the beams were considered as isotropic,homogeneous,linear elastic material in the traditional analysis method.However,more accurate results are required in the analysis of frequency of PSC beam.The constitutive mode of PSC member is analyzed based on microstructure of concrete in this paper.The orthotropic linear elastic mode is used to analyze the relation between dynamic frequency and prestressing force of concrete beam,at the same time the equivalent stiffness of prestressed tendon relating to the prestressing force is added to the bending deformation stiffness of the beam.The analytical value agrees well with the test result,indicating that the current analysis method in this paper is feasible to full-prestressed concrete beam. |
| |
| Keywords: | full-prestressed concrete beam prestressing force natural frequency anisotropic material |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
