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) ›› 2007, Vol. 26 ›› Issue (6): 18-23.

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等截面薄壁梯形箱梁剪力滞效应分析

常国强1,巫祖烈1,2,赵奋1,管延武1   

  1. 1.重庆交通大学土木建筑学院,重庆 400074;2.重庆交通大学桥梁结构工程交通行业重点实验室,重庆 400074
  • 收稿日期:2006-10-16 修回日期:2006-11-15 出版日期:2007-12-15 发布日期:2015-01-22
  • 作者简介:常国强(1980—),男,山东淄博人,硕士研究生,主要从事旧桥维修加固以及桥梁新结构方面的研究工作. E-mail:guoq_chang@yaho.com.cn.

Analysis of Shear Lag in Trapezia Thin-Walled Box Beams witIl Constant Cross Section

CHANG Guo-qiang1,WU Zu-lie1,2,ZHAO Fen1,GUAN Yan-wu1   

  1. 1.School of Civil Engineering&Architecture,Chongqing Jiaotong University,Chongqing 400074,China;2.Key Laboratory of Bridge-Structure Engineering Ministry of Communications,Chongqing Jiaotong University,Chongqing 400074,China
  • Received:2006-10-16 Revised:2006-11-15 Online:2007-12-15 Published:2015-01-22

摘要: 假定箱梁的纵向位移沿横截面满足余弦函数分布,考虑荷载沿横向的作用位置的影响,采用广义变分原理推 导出了等截面梯形箱梁发生对称挠曲时的剪力滞效应表达式,并与三次抛物线法的计算结果进行对比,证明了计算 假定的合理性.

关键词: 等截面梯形箱梁, 剪力滞效应, 广义变分原理, 余弦函数

Abstract: Cosine functions are supposed to simulate the longitudinal displacement of thin·walled box beams when bended. The differential equations of Trapezia thin-walled box beams with constant section are derived on the basis of generalized variational principle,and the solutions of simply supported box girders subjected to vertical concentrated load and vertical uniform pressure load are obtained .The example shows that this method matches cubic·parabola—function method.

Key words: thin-walled box beams, shear lag, generalized variational principle, cosine function

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