Calculation Method of Bearing Capacity of Complex Pipe Plate-Intersecting Joints of Long-Span Steel Pipe Tower
Taking the Yangtze River large-span steel pipe transmission tower of the Baihetan-Zhejiang±800 kV UHVDC transmission line in the Chizhou section of Anhui Province as the engineering background,this study investigated the mechanical performance of complex pipe plate-intersecting joints connecting the lower cross-arm and the main pipe at the top of the transmission tower.A finite element model of the joint was established,and its validity was verified through comparative analysis.Furthermore,parametric analysis of the key geometric dimensions of the joint was conducted to examine their impact on the joint's bearing capacity.The results show that the primary factors influencing the bearing capacity of the horizontal branch pipe and inclined pipes are the geometric dimensions of the horizontal branch pipe and the thickness of the connection plate of the inclined branch pipe,respectively.Based on this,a layer-by-layer decomposition method is employed to derive the joint's bearing capacity,and a recommended formula for its calculation is provided.The calculated results show an error of within 12%when compared to the actual bearing capacity,making the formula a reliable reference for engineering applications.
long-span steel pipe towerpipe plate-intersecting jointultimate bearing capacityfinite element analysis
万方数据
维普
