建筑结构学报2011，Vol.32Issue(12)：250-256,7.
铸钢节点环形对接焊缝热点应力分析
Hot spot stress analysis of girth butt weld in cast steel joint
摘要
Abstract
As cast steel joints are thicker than the hot-rolled tubes attached,sharp transition in the direction of thickness would cause stress concentration and weaken its fatigue performance.At present,there are no regulations or standards to guide the design of girth butt weld＇s fatigue behavior of cast steel joints.A hot-spot stress FEM analysis of weld＇s fatigue behavior was conducted based on the surface extrapolation method in this paper,considering two kinds of welding details under axial loads.Parametric analysis were carried out on the thickness（t） of hot-rolled tube,the ratio of tube＇s diameter to its thickness（d/t） and the ratio of cast steel joint＇s thickness to tube＇s（T/t）.The results show that although the hot-spot stress is independent of the thickness of tubes（t）,it will increase linearly with the increment of ln（d/t） and increase firstly then decrease with the increment of T/t.In addition,ln（σ/（T/t））（σ means the hot-spot stress） decreases linearly with the increment of T/t.关键词
铸钢节点/环形对接焊缝/有限元分析/热点应力/焊接构造Key words
cast steel joint/girth butt weld/FEA/hot spot stress/welding detail分类
建筑与水利引用本文复制引用
韩庆华,陈志钢,芦燕..铸钢节点环形对接焊缝热点应力分析[J].建筑结构学报,2011,32(12):250-256,7.基金项目
国家自然科学基金面上项目 （）
天津市自然科学基金项目 （）
