沈阳工业大学学报2012，Vol.34Issue(1)：104-110,7.
厚板柱钢框架梁柱节点对断裂韧性的要求
Demand of beam-column connection in steel frame with thick plate column on fracture toughness
摘要
Abstract
In order to investigate the demand of beam-column connections in steel frame with thick plate column on the fracture toughness of materials,the finite element calculation of three dimensional（3D） elastic and elastoplastic fracture mechanics was carried out.The stress intensity factor（KI） and J-integral（JI） around crack tip were used as the evaluation indexes,and the different requirements of such factors as the weld access hole form,either weakening or strengthening with beam flange and initial crack location on the fracture toughness of beam-column connections were analyzed.The results show that the weld access hole B improved after Northridge earthquake in USA exhibits the lowest demand on the fracture toughness,while the weld access hole D given by ＂Code for anti seismic design of buildings＂ in China shows relatively higher demand on the fracture toughness.Compared with the standard connections,the beam flange weakened or strengthened connection can reduce the demand on the fracture toughness remarkably.With the high weld match,the crack in heat-affected zone is easier to propagate than that in weld root zone,and leads to the fracture failure of the connections.The quantitative evaluation method for the fracture of beam-column connections in steel frame can provide the references for the selection of steel,welding material,weld access hole and connection form in the anti-fracture design of connections.关键词
厚板/钢框架/梁柱节点/断裂韧性/应力强度因子/J积分/焊接孔/裂纹位置Key words
thick plate/steel frame/beam-column connection/fracture toughness/stress intensity factor/J-integral/weld access hole/crack location分类
建筑与水利引用本文复制引用
王元清,周晖,石永久,陈宏..厚板柱钢框架梁柱节点对断裂韧性的要求[J].沈阳工业大学学报,2012,34(1):104-110,7.基金项目
国家自然科学基金资助项目 （）
