圆管刚性法兰加劲肋角焊缝受力特性及强度计算理论

王宇强; 张大长; 李步辉; 孙铭泽

doi:10.6052/j.issn.1000-4750.2013.12.1238

圆管刚性法兰加劲肋角焊缝受力特性及强度计算理论

1.
南京工业大学土木工程学院,南京 210009;
2.
河海大学土木交通工程学院,南京 210012

基金项目: 2013年江苏省“六大人才高峰”项目

详细信息

作者简介:
王宇强(1988—),男,江苏人,硕士生,从事钢结构研究(E-mail: yqwang0807@163.com); 李布辉(1987—),男,江苏人,博士生,从事钢结构研究(E-mail: libuhui0503@163.com); 孙铭泽(1988-),男,江苏人,硕士生,从事钢结构研究(E-mail: sunmingze8854@gmail.com).

通讯作者:
张大长(1971—),男,浙江人,教授,博士,从事土木工程结构研究(E-mail: dczhangchina@163.com).

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出版历程
- 收稿日期: 2013-12-30
- 修回日期: 2014-05-06
- 刊出日期: 2015-07-24

MECHANICAL BEHAVIOR AND STRENGTH CALCULATION THEORY OF STIFFENER FILLET WELD IN CIRCLE RIGID FLANGE

1.
College of Civil engineering, Nanjing University of Technology, Nanjing 210009, China;
2.
College of Civil and Transportation Engineering, Hohai University, Nanjing 210012, China

摘要

摘要: 该文针对圆钢管刚性法兰角焊缝在轴拉荷载作用下的受力性能开展了非线性有限元分析,研究了法兰竖向、横向和环向角焊缝在不同荷载水平下的应力发展规律,指出了法兰在轴拉荷载下三道焊缝的传力分配,进行了不同加劲肋高宽比对竖向焊缝受力影响的研究,提出了更加科学合理的角焊缝计算公式,并通过刚性法兰节点轴拉静力试验证实了所提出的计算公式的合理性。结合有限元分析及试验研究结果得到如下结论：圆钢管刚性法兰竖向角焊缝在轴拉荷载下的焊喉截面正应力呈上大下小的非对称分布,竖向焊缝的拉压分界线位于焊缝长度约1/5处;角焊缝落弧端存在应力集中;在允许焊缝部分进入塑性的情况下,结构依然是安全的;修正后的角焊缝强度计算公式可应用于圆钢管结构刚性法兰的连接设计。
- 圆钢管刚性法兰 /
- 角焊缝 /
- 有限元模拟 /
- 加劲肋 /
- 强度计算理论
Abstract: Stress distribution and development of vertical, horizontal and toroidal fillet welds under different levels of uniaxial tension has been obtained by nonlinear finite element method. From this analysis, the force distribution and development of the three different direction welds were clarified, and the relation between the height-width ratio of stiffener and the vertical weld’s stress level was pointed out. The more rigorous calculation formula of fillet weld based on the results of numerical analysis was proposed. At last, the reasonability of the proposed formula was verified through static experiments of rigid flange joint. The comparison between finite element analyses and experiments shows that the normal stress of vertical fillet weld presents an asymmetric distribution with larger stress occurring at the top and smaller stress occurring at the bottom, and the boundary of tension and compression locates at the height of 1/5; stress concentration occurs at both ends of fillet weld; the structural safety is guaranteed in consideration of partial plasticization; the proposed formula for fillet weld can be applied in practical engineering.
- circle rigid flange /
- fillet weld /
- finite element method /
- stiffener /
- strength calculation theory

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参考文献(10)

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