中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2017, Vol. 36 ›› Issue (7): 15-20.DOI: 10.3969/j.issn.1674-0696.2017.07.03

• 桥梁与隧道工程 • 上一篇    下一篇

偏心布筋曲梁振动微分方程推导和求解

何文正1, 陈晨2, 李鹏程3, 文竞舟4   

  1. (1. 重庆广播电视大学 城市建设工程学院,重庆 400052;2. 宜宾职业技术学院 建筑工程系,四川 宜宾 644000; 3. 重庆交通科研设计院 道路所,重庆 400067;4. 云南省公路科学技术研究院 岩土所,云南 昆明 650051)
  • 收稿日期:2015-12-02 修回日期:2016-07-16 出版日期:2017-07-31 发布日期:2017-07-31
  • 作者简介:何文正(1982—),男,重庆人,讲师,硕士,主要从事桥梁检测加固方面的研究。
  • 基金资助:
    交通运输部建设科技项目(2013318791440);重庆广播电视大学重点基金项目(ZD2015-02)

Derivation and Solution of Vibration Differential Equation of the Curved Beam with Eccentric Reinforce

HE Wenzheng1, CHEN Chen2, LI Pengcheng3, WEN Jingzhou4   

  1. (1. School of Urban Construction Engineering, Chongqing Radio & TV University, Chongqing 400052, P. R. China; 2. Department of Architecture Engineering, Yibin Vocational and Technical College, Yibin 644000, Sichuan, P. R. China; 3. Road Research Institute, Chongqing Communications Research and Design Institute, Chongqing 400067, P. R. China; 4. Rock and Soil Engineering Institute, Yunnan Science & Technology Research Institute of Highway, Kunming 650051, Yunnan, P. R. China)
  • Received:2015-12-02 Revised:2016-07-16 Online:2017-07-31 Published:2017-07-31

摘要: 为研究预应力筋偏心距和半径等参数对曲梁振动特性的影响,以自由振动状态下的曲梁微段为研究对象,考虑偏心布筋产生的初始曲率对振动的影响,推导了偏心布筋曲梁振动偏微分方程,并求解方程得到了简支曲梁面内振动1阶频率理论计算公式;最后通过实例分析验证了所提理论公式的正确性。

关键词: 桥梁工程, 曲梁, 偏心布筋, 初始曲率, 自振频率

Abstract: In order to study the influence of tendon eccentricity and radius on the vibration characteristics of the curved beam, the differential equation of the vibration of the prestressed curved beam considering the influence of initial curvature on vibration was derived by analyzing the micro section of the curved beam under the condition of free vibration. Then the theoretic calculation formula of the first order natural frequency vibration of the eccentric reinforcement simply supported curved beam was deduced by solving the equation. Finally, the correctness of the proposed theoretic formula was verified by the case study.

Key words: bridge engineering, curved beam, eccentric reinforce, initial curvature, natural frequency of vibration

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