[1]王晨光,张元海.几何特性对薄壁箱梁畸变效应的影响[J].东南大学学报(自然科学版),2020,50(1):89-95.[doi:10.3969/j.issn.1001-0505.2020.01.012]
　Wang Chenguang,Zhang Yuanhai.Influence of geometric characteristics on distortion effect of thin-walled box girders[J].Journal of Southeast University (Natural Science Edition),2020,50(1):89-95.[doi:10.3969/j.issn.1001-0505.2020.01.012]
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几何特性对薄壁箱梁畸变效应的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
50
期数:
2020年第1期
页码:
89-95
栏目:
交通运输工程
出版日期:
2020-01-13

文章信息/Info

Title:
Influence of geometric characteristics on distortion effect of thin-walled box girders
作者:
王晨光; 张元海
兰州交通大学土木工程学院, 兰州 730070
Author(s):
Wang Chenguang;  Zhang Yuanhai
School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
关键词:
箱形梁;  畸变效应;  能量变分法;  几何特性
Keywords:
box girder;  distortion effect;  energy variation method;  geometric characteristic
分类号:
U448.213
DOI:
10.3969/j.issn.1001-0505.2020.01.012
摘要:
为了寻找能够直观反映箱形梁畸变效应的几何特性,应用能量变分法建立了单箱单室箱形梁的畸变控制微分方程,得出了综合反映箱形梁畸变效应的畸变几何特性参数λ.通过数值算例,详细分析了几何特性对简支箱形梁畸变效应的影响.结果表明,解析理论计算所得畸变翘曲应力与有限元法计算所得结果相近.随着跨高比的增加,箱形梁跨中横截面上的畸变矩保持不变,而畸变双力矩呈现出先减小后增大的趋势.当λ较小时,畸变内力降低幅度较大;λ逐渐增大时,畸变内力的降低幅度减小,且在远离荷载作用处以较快的速度衰减.几何特性λ随着梁高的增大而逐渐减小,随着箱壁厚度的增大基本呈线性增大.
Abstract:
In order to find the geometric characteristics directly reflecting the distortion effect of a box girder, the distortion control differential equation of a single-cell box girder was established by using the energy variation method, and the distortion geometric characteristic parameter λ, which comprehensively reflects the distortion effect of the box girder, was obtained. Through the numerical examples, the influence of geometric characteristic on the distortion effect of the box girder was analyzed. The results show that the distortion warping stresses obtained by the analytical method are in good agreement with those calculated by the finite element method. With the increase of the span height ratio, the distortion moment on the middle cross section remains unchanged, while the distortion bimoment shows a trend of decreasing at first and then increasing. When λ is small, the distortion internal forces reduce largely. When λ increases gradually, the speed of reduction decreases, and the distortion internal forces away from the load decay rapidly. The geometric characteristic λ decreases with the increase of the girder’s height, and basically increases linearly with the increase of the box wall’s thickness.

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备注/Memo

备注/Memo:
收稿日期: 2019-05-06.
作者简介: 王晨光(1992—),男,博士生; 张元海(联系人),男,博士,教授,博士生导师,zyh17012@163.com.
基金项目: 国家自然科学基金资助项目(51468032,51968040)、兰州交通大学青年基金资助项目(1200060824).
引用本文: 王晨光,张元海.几何特性对薄壁箱梁畸变效应的影响[J].东南大学学报(自然科学版),2020,50(1):89-95. DOI:10.3969/j.issn.1001-0505.2020.01.012.
更新日期/Last Update: 2020-01-20