[1]雒家琪,董毓利,赵明岩.集中荷载和均布荷载作用下悬臂箱梁剪力滞效应试验[J].华侨大学学报(自然科学版),2022,43(1):44-50.[doi:10.11830/ISSN.1000-5013.202104046]
　LUO Jiaqi,DONG Yuli,ZHAO Mingyan.Test on Shear Lag Effect of Cantilever Box Girder Under Concentrated Load and Uniformly Distributed Load[J].Journal of Huaqiao University(Natural Science),2022,43(1):44-50.[doi:10.11830/ISSN.1000-5013.202104046]
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集中荷载和均布荷载作用下悬臂箱梁剪力滞效应试验()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第43卷
期数:
2022年第1期
页码:
44-50
栏目:
出版日期:
2022-01-09

文章信息/Info

Title:
Test on Shear Lag Effect of Cantilever Box Girder Under Concentrated Load and Uniformly Distributed Load
文章编号:
1000-5013(2022)01-0044-07
作者:
雒家琪;  董毓利;  赵明岩
华侨大学 土木工程学院, 福建 厦门 361021
Author(s):
LUO Jiaqi;  DONG Yuli;  ZHAO Mingyan
College of Civil Engineering, Huaqiao University, Xiamen 361021, China
关键词:
悬臂箱梁;  剪力滞;  集中荷载;  均布荷载
Keywords:
cantilever box girder;  shear lag;  concentrated load;  uniformly distributed load
分类号:
U448.21
DOI:
10.11830/ISSN.1000-5013.202104046
文献标志码:
A
摘要:
对悬臂箱梁进行集中荷载和均布荷载的加载试验,探讨沿箱梁轴向剪力滞影响程度的变化,以及加载形式对悬臂箱梁不同区域的剪力滞影响.结果表明:在集中荷载和均布荷载作用下,悬臂箱梁同时存在正剪力滞现象和负剪力滞现象,从自由端至固定端方向,箱梁受负剪力滞的影响逐渐减小,受正剪力滞的影响逐渐增大;均布荷载作用下的剪力滞系数大于初等梁理论的计算值;相较于均布荷载,悬臂箱梁在集中荷载作用下受剪力滞的影响较小,正、负剪力滞分界点离固定端较远.
Abstract:
The cantilever box girder is tested under concentrated load and uniformly distributed load. The influence of the shear lag along the axial direction of the box girder and the influence of the loading form on the shear lag of different regions of the cantilever box girder are discussed. The result shows that under concentrated load and uniformly distributed load, there are both positive and negative shear lag phenomenons in cantilever box girder. From the free end to the fixed end, the influence of negative shear lag on box girder decreases gradually, and the influence of positive shear lag increases gradually. The shear lag coefficient under the uniformly distributed load is greater than the calculation value of the elementary beam theory. Compared with the uniformly distributed load, the cantilever box girder is less affected by the shear lag under the concentrated load, the demarcation point of positive and negative shear lag is far from the fixed end.

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备注/Memo

备注/Memo:
收稿日期: 2021-04-23
通信作者: 董毓利(1965-),男,教授,博士,博士生导师,主要从事结构抗火的研究.E-mail:DongYL@hqu.edu.com.
基金项目: 国家自然科学基金资助项目(51978293, 51278207); 华侨大学研究生科研创新基金资助项目(180130 86022)
更新日期/Last Update: 2022-01-20