大连理工大学学报2026，Vol.66Issue(3)：281-290,10.DOI:10.7511/dllgxb202603008
空间TT型铸钢节点支管轴向极限承载力分析
Analysis of ultimate bearing capacity in axial direction of branch pipe of spatial TT type cast steel joint
摘要
Abstract
Based on the verification of the true stress-strain relationship of cast steel material G20Mn5N using finite element method,64 sets of numerical simulations are conducted on spatial TT type cast steel joints and a method is proposed for determining the ultimate bearing capacity of such joint.By summarizing the failure mode of the joint,the influence of geometric construction parameters on the ultimate bearing capacity in axial direction of the branch pipe is explored.The results indicate that the ultimate bearing capacity in axial direction of the branch pipe of the spatial TT type cast steel joint is closely related to geometric construction parameters such as the chamfer coefficient ρ at the intersection of the main pipe and branch pipe,the diameter ratio α,the thickness ratio β,the length ratio γ,and the angle θ between the two branch pipes.Based on the analysis of various parameters and existing research results and standards,a calculation formula is presented for the ultimate bearing capacity of spatial TT type cast steel joint with an angle θ of 90° through multiple nonlinear regression analysis.The calculation formula results are compared with the numerical simulation results,and the accuracy of the calculation formula is verified.The research results can provide a certain theoretical basis for the practical engineering application and specification writing.关键词
铸钢节点/TT型钢管节点/轴力作用/极限承载力/有限元分析Key words
cast steel joint/TT type steel pipe joint/axial force effect/ultimate bearing capacity/finite element analysis分类
建筑与水利引用本文复制引用
樊晨阳,韩晓通,杨翊杰,吴昊桦,刘岩,李亮,武艳如..空间TT型铸钢节点支管轴向极限承载力分析[J].大连理工大学学报,2026,66(3):281-290,10.基金项目
陕西省博士后科研项目(2023BSHTBZZ35). （2023BSHTBZZ35）
