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) ›› 2013, Vol. 32 ›› Issue (4): 577-580.DOI: 10.3969 /j.issn.1674-0696.2013.04.07

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跳车质量对实测自振频率影响的修正

施尚伟,徐绪绪,许 鹏   

  1. 重庆交通大学 土木建筑学院,重庆 400074)
  • 收稿日期:2012-05-10 修回日期:2013-05-24 出版日期:2013-08-15 发布日期:2014-10-27
  • 作者简介:施尚伟(1963—),男,浙江磐安人,副教授,主要从事桥梁检测及荷载试验方面的研究。E-mail:ssw63@126.com。

Correcting on Bump Quality Impact on Filed Test of Natural Vibration Frequency

Shi Shangwei,Xu Xuxu,Xu Peng   

  1. School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China
  • Received:2012-05-10 Revised:2013-05-24 Online:2013-08-15 Published:2014-10-27

摘要: 对三等跨连续梁跳车试验的分析发现,试验载重车附加质量会影响桥梁自振频率的测定结果。采用瑞利法假定跳车试验形函数,引入修正系数 λ,提出了三等跨连续梁实测自振频率的修正公式。实例验证表明: 实测频率误差值修正后比修正前减小 27%。

关键词: 跳车试验, 附加质量, 自振频率

Abstract: Through the analysis on three-equal-span continuous beam jump car test,it is found that the additional quality of test truck can affect the measured bridge natural frequencies. Rayleigh method is used to assume the shape function of bump test; correction coefficient λ is introduced and a modified formula for the measured natural vibration frequency of three-equal-span continuous beam. The case study shows that the error of field measuring frequency reduces by 27% after correction than that before correction.

Key words: bump test, additional mass, natural vibration frequency

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