# [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] 点击复制 几何特性对薄壁箱梁畸变效应的影响() 分享到： var jiathis_config = { data_track_clickback: true };

50

2020年第1期

89-95

2020-01-13

## 文章信息/Info

Title:
Influence of geometric characteristics on distortion effect of thin-walled box girders

Author(s):
School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Keywords:

U448.213
DOI:
10.3969/j.issn.1001-0505.2020.01.012

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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