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清华大学学报(自然科学版)  2016, Vol. 56 Issue (9): 980-984    DOI: 10.16511/j.cnki.qhdxxb.2016.21.062
  土木工程 本期目录 | 过刊浏览 | 高级检索 |
带支撑箱形钢拱的平面外弹性屈曲性能分析
赵思远1,2, 郭彦林1, 王宏2
1. 清华大学 土木工程系, 北京 100084;
2. 中建钢构有限公司, 深圳 518000
Out-of-plane elastic buckling analysis of box-section arches with lateral bracings
ZHAO Siyuan1,2, GUO Yanlin1, WANG Hong2
1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China;
2. China Construction Steel Structure Corp. Ltd., Shenzhen 518000, China
全文: PDF(1166 KB)  
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摘要 为提高钢拱的平面外稳定性,钢拱的平面外通常布置有一定数目的弹性离散支撑。该文研究了拱顶设置单个弹性支撑作用时,箱形截面钢拱的平面外弹性屈曲性能。首先采用能量法推导得到了弹性支撑作用下,箱形截面纯弯两铰拱和纯压两铰拱的平面外弹性屈曲荷载;其次结合无支撑拱的弹性屈曲性能,获得了弹性支撑的门槛刚度计算公式。该方法的结果与有限元计算结果吻合较好,可以作为离散支撑均匀分布的箱形截面钢拱平面外弹塑性稳定设计的基础。
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关键词 钢拱弹性屈曲平面外支撑能量法门槛刚度    
Abstract:Arches are usually arranged with lateral bracings to improve their out-of-plane stability. The out-of-plane elastic buckling of box-section arches was analyzed with a single lateral bracing on the crown. The energy method was used to derive the formulas for the out-of-plane buckling loads on lateral braced box-section arches for uniform compression or uniform bending. Then, the out-of-plane elastic buckling solution for arches with no lateral bracings was used to derive the threshold stiffness of the lateral bracings. The out-of-plane buckling loads and threshold stiffnesses of the lateral bracings given by this method agree well with finite element results and can be applied to calculate the the out-of-plane inelastic strength of box-section steel arches with lateral bracings.
Key wordssteel arches    elastic buckling    out-of-plane    brace    energy method    threshold stiffness
收稿日期: 2016-04-15      出版日期: 2016-09-15
ZTFLH:  TU391  
通讯作者: 郭彦林,教授,E-mail:gyl@tsinghua.edu.cn     E-mail: gyl@tsinghua.edu.cn
引用本文:   
赵思远, 郭彦林, 王宏. 带支撑箱形钢拱的平面外弹性屈曲性能分析[J]. 清华大学学报(自然科学版), 2016, 56(9): 980-984.
ZHAO Siyuan, GUO Yanlin, WANG Hong. Out-of-plane elastic buckling analysis of box-section arches with lateral bracings. Journal of Tsinghua University(Science and Technology), 2016, 56(9): 980-984.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2016.21.062  或          http://jst.tsinghuajournals.com/CN/Y2016/V56/I9/980
  图1 纯弯和纯压两铰拱
  图2 拱顶单支撑的平面外屈曲变形
  表1 截面类型和尺寸
  图3 带支撑纯弯拱的平面外弹性屈曲性能
  图4 带支撑纯压拱的平面外弹性屈曲性能
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