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[1]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):18-21.[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):18-21.[doi:103969/jissn16742869201403004]
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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(/HTML)
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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:
18-21
栏目:
资源与土木工程
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
文章编号:
16742869(2014)03001804
作者:
卢海林1; 张伟1; 颜昌雄2
1.武汉工程大学资源与土木工程学院，湖北 武汉 430074；2.湖北交通投资有限公司江南高速公路有限公司，湖北 公安 434300
Author(s):
LU Hailin1; ZHANG Wei1; YAN Changxiong
1.School of Resource and Civil Engineering,Wuhan Institute of Technology,Wuhan 430074,China;2.Jiangnan Expressway Co.,LTD,Hubei Provincial Communicatons Tnvestment Co.,LTD,Gongan 434300,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:
103969/jissn16742869201403004
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7种不同的移动荷载速度对悬臂曲线箱梁和悬臂直线箱梁中剪力滞效应的影响.重点分析了荷载以不同速度移动到悬臂箱梁L/2处时该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，两种悬臂箱梁L/2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增大，当移动荷载速度小于2 m/s时，剪力滞系数增长缓慢；当移动荷载速度超过2 m/s时，剪力滞系数增长较快；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 box girders;the shear lag coefficient increases with the increase of moving load speed,it increases slowly when moving load speed is less than 2 m/s,but it increases quickly 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:

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相似文献/References:

[1]卢海林,朱松波,周小龙,等.不同荷载作用下直线箱梁剪力滞效应分析[J].武汉工程大学学报,2014,(12):39.[doi:10. 3969/j. issn. 1674-2869. 2014. 012. 008]
　,ZHOU Xiao-long,et al.Ｓｈｅａｒ ｌａｇ ｅｆｆｅｃｔ ｏｆ ｓｔｒａｉｇｈｔ ｂｏｘ ｇｉｒｄｅｒ ｕｎｄｅｒ ｄｉｆｆｅｒｅｎｔ ｌｏａｄｓ[J].Journal of Wuhan Institute of Technology,2014,(03):39.[doi:10. 3969/j. issn. 1674-2869. 2014. 012. 008]
[2]卢海林,张　山,万崇勇,等.静动荷载作用下简支预应力混凝土曲线箱梁剪力滞效应分析[J].武汉工程大学学报,2016,38(05):465.[doi:10. 3969/j. issn. 1674?2869. 2016. 05. 011]
　LU Hailin,ZHANG Shan,WAN Chongyong,et al.Shear Lag Effect of Curved Box Girder of Simply-Supported Prestressed Concrete Under Static and Dynamic Load[J].Journal of Wuhan Institute of Technology,2016,38(03):465.[doi:10. 3969/j. issn. 1674?2869. 2016. 05. 011]
[3]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.

备注/Memo

备注/Memo:
收稿日期：20140212基金项目：国家自然科学基金（51378404）；武汉工程大学研究生教育创新基金（CX201239)作者简介：卢海林(1965)，男，湖南安乡人，教授，博士.研究方向：桥梁结构分析、建筑结构抗震与加固.
更新日期/Last Update: 2014-04-18