预应力对体外预应力简支钢梁自振频率的影响

吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (01): 81-85.

预应力对体外预应力简支钢梁自振频率的影响

刘寒冰¹, 王龙林¹, 谭国金¹, 程永春¹, 吴昌霞²

1. 吉林大学交通学院, 长春 130022;
2. 长春市市政工程设计研究院, 长春 130033

收稿日期:2012-01-16 出版日期:2013-01-01 发布日期:2013-01-01
通讯作者: 谭国金(1981-),男,讲师,博士.研究方向:桥梁工程.E-mail:tgj@jlu.edu.cn E-mail:tgj@jlu.edu.cn
作者简介:刘寒冰(1957-),男,教授,博士生导师.研究方向:道桥结构动态优化理论及应用.E-mail:lhb@jlu.edu.cn
基金资助:
高等学校博士学科点专项科研基金项目(20100061120066).

Effect of prestress force on natural frequency of external prestressed simply supported steel beam

LIU Han-bing¹, WANG Long-lin¹, TAN Guo-jin¹, CHENG Yong-chun¹, WU Chang-xia²

1. College of Transportation, Jilin University, Changchun 130022, China;
2. Changchun Municipal Engineering Design & Research Institute, Changchun 130033, China

Received:2012-01-16 Online:2013-01-01 Published:2013-01-01

摘要/Abstract

摘要： 利用有限元方法建立了体外预应力简支钢梁的有限元模型,对不同预应力值及预应力筋不同偏心距布置条件下简支钢梁的自振频率进行动力仿真分析。通过仿真结果分析预应力大小对自振频率的影响规律及影响程度,最后给出了预应力值与桥梁自振频率的定量关系,为开展预应力简支梁中有效预应力的识别提供了一定的理论支撑。

关键词: 道路工程, 预应力简支梁, 自振频率, 预应力, 有限元方法

Abstract: The finite element method was used to build a finite element model for the external prestressed simply supported steel beam to simulate dynamically the natural frequencies of the beam under different prestress forces and different prestressed reinforcement eccentricity arrangements. Based on the results, the behavior and the extent of the effect of the prestress force on the natural frequencies were analyzed and the quantitative relations between the prestress force and the natural frequencies of the bridge were obtained, giving a theoretical support for the idcntitication of the effective prestress force in the prestressed simply supported beams.

Key words: road engineering, prestressed simply supported beam, natural frequency, prestress force, finite element method

中图分类号:

U441.3

刘寒冰, 王龙林, 谭国金, 程永春, 吴昌霞. 预应力对体外预应力简支钢梁自振频率的影响[J]. 吉林大学学报(工学版), 2013, 43(01): 81-85.

LIU Han-bing, WANG Long-lin, TAN Guo-jin, CHENG Yong-chun, WU Chang-xia. Effect of prestress force on natural frequency of external prestressed simply supported steel beam[J]. 吉林大学学报(工学版), 2013, 43(01): 81-85.

参考文献

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[9] 谭国金,刘寒冰,程永春,等.基于车桥耦合振动的简支梁桥冲击效应[J].吉林大学学报:工学版,2011,41(1):62-67. Tan Guo-jin, Liu Han-bing, Cheng Yong-chun,et al. Analysis of impact of vehicle of simply supported beam bridge based on vehicle-bridge coupled vibration[J]. Journal of Jilin University(Engineering and Technology Edition),2011,41(1):62-67.

[10] 焦玉玲,刘寒冰,秦绪喜,等.权函数对梁自由振动问题计算精度的影响[J].吉林大学学报:工学版,2008,38(3):624-629. Jiao Yu-ling, Liu han-bing, Qin Xu-xi,et al.Weight function effects on computational precision of free vibration of beam[J].Journal of Jilin University(Engineering and Technology Edition),2008,38(3):624-629.

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