Method and system for calculating bearing capacity of cross arm node of steel pipe and angle steel combined tower

The invention belongs to the technical field of steel pipe and angle steel combined towers, and provides a method and system for calculating bearing capacity of cross arm nodes of a steel pipe and angle steel combined tower. The method comprises the following steps: acquiring related parameters of a main pipe, and calculating to obtain a main pipe axial compression ratio; determining a steel pipe angle steel combination node damage mode based on the main pipe axial compression ratio; determining the geometric dimension of the gusset plate according to the damage mode of the steel pipe and angle steel combined node, and calculating to obtain the internal force distribution ratio parameter of each plate; checking the bearing capacity of the gusset plate based on an effective width method, and further calculating the ultimate bearing capacity of each combined node under the cross arm tension working condition according to the bearing capacity of the gusset plate and the internal force distribution ratio paramete