|本期目录/Table of Contents|

[1]卢海林,张 伟,南子俊,等.移动荷载速度对悬臂曲线箱梁剪力滞效应的影响[J].武汉工程大学学报,2014,(03):52.
　LU Hai-linZHANG WeiNAN Zi-junQIAN Chao-bangZHANG Shan.Moving load speed on shear lag effect of cantilever curved box girder[J].Journal of Wuhan Institute of Technology,2014,(03):52.
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移动荷载速度对悬臂曲线箱梁剪力滞效应的影响()
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2014年03期
页码:
52
栏目:
出版日期:
2014-03-31

文章信息/Info

Title:
Moving load speed on shear lag effect of cantilever curved box girder
作者:
卢海林; 张 伟; 南子俊; 乾超邦; 张 山
(武汉工程大学环境与城市建设学院,湖北 武汉 430074)
Author(s):
LU Hai-linZHANG WeiNAN Zi-junQIAN Chao-bangZHANG Shan
 School of Environmental and Civil Engineering, Wuhan Institute of Technology, Wuhan 430074, China
关键词:
箱梁; 剪力滞效应; 有限元; 移动荷载速度
Keywords:
box girder;  shear lag effect;  finite element;  moving load speed
分类号:
U448.42
DOI:
-
文献标志码:
A
摘要:
利用三维有限元通用软件ANSYS，设置相同的悬臂长度、弹性模量、泊松比和密度等参数，分别考察了悬臂曲线箱梁和悬臂直线箱梁中7种不同的移动荷载速度对悬臂箱梁剪力滞效应的影响。重点分析了荷载移动到悬臂箱梁1/2L处时横截面上应力分布及剪力滞系数变化规律。结果表明：在移动荷载作用下，两种结构形式的悬臂箱梁1/2L处横截面上均出现正剪力滞现象；剪力滞系数随着移动荷载速度的增大而缓慢增大，当移动荷载速度超过2m/s时，剪力滞系数增长明显；悬臂曲线箱梁内侧剪力滞系数明显大于外侧剪力滞系数，悬臂直线箱梁剪力滞系数分布曲线介于悬臂曲线箱梁内侧与外侧剪力滞系数分布曲线之间。
Abstract:
Using general software of a three dimensioned finite element ANSYS, the shear lag effect under seven different moving load speed was respectively investigated in the cantilever curved and straight box girder while setting up the same parameters such as length, elastic modulus, Poisson’s ratio and density. The distribution of section stress and shear lag coefficient was mainly analyzed when the loads moved to the mid-span of the cantilever box girder. The results show that under the effect of moving load, the positive shear lag phenomena are confirmed in mid-span sections of the two kinds of box girders; the shear lag coefficient increases slowly with the increase of moving load speed ,but it increases significantly when moving load speed exceeds 2 m/s; the inside shear lag coefficient of curved box girder is obviously bigger than that of the outside; the shear lag coefficient distribution curve of cantilever straight box girder was between the curves of inside and outside coefficient distribution of the curved box girder

参考文献/References:

[1] 卢海林. 预应力混凝土曲线箱梁剪力滞效应 理论分析与试验分析[D]. 天津: 天津大学, 2005.
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Wan Haibin. Study on shear lag effect of curved prestressed concrete box girder[D]. Xian: Changan University, 2008. (in Chinese)
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Liu Jian-xin, Ma Lin, Hu Qin-gan. The research of analysis method of shear lag’s effect on forced vibration of thin-wall box-girder[J]. Zhengzhou: Journal of Zhengzhou University, 2008, 29(3): 122-128. (in Chinese)
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相似文献/References:

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[3]卢海林,张伟,颜昌雄.移动荷载速度对悬臂曲线箱梁剪力滞效应的影响[J].武汉工程大学学报,2014,(03):18.[doi:103969/jissn16742869201403004]
　LU Hai lin,ZHANG Wei,YAN Chang xiong.Moving load speed on shear lag effect of cantilever curved box girder[J].Journal of Wuhan Institute of Technology,2014,(03):18.[doi:103969/jissn16742869201403004]

备注/Memo

备注/Memo:
基金项目：国家自然科学基金（项目批准号：51378404）；武汉工程大学研究生教育创新基金（项目批准号：CX201239)收稿日期：2014-02-12
作者简介：卢海林(1965-)，男，教授，博士。
更新日期/Last Update: 2014-03-13