The selection of the geometrical dimensions of each part of the node is mainly based on the bearing capacity of the node, ensuring that the nuts in the node do not touch each other, and the gasket cones at the ends of the members do not touch each other.
In addition, factors such as the pipe diameter and wall thickness of the steel pipe should also be considered. According to the relevant data, the wall thickness of the joint shell is one of the most significant factors affecting the bearing capacity, and the thickness of the cover also has a great influence on the bearing capacity of the joint.
Therefore, it is necessary to ensure that the wall thickness of the casing and the thickness of the cover are sufficiently thick. Under normal circumstances, the wall thickness of the casing and the thickness of the cover plate should not be too different. It is better to ensure that the thickness of the cover plate is not less than the wall thickness of the casing, so as to avoid premature loss of the restraint of the cover plate.
From the perspective of construction, the dimensions of each part should satisfy the following relationship: the inner gasket size is not less than the outer diameter of the high-strength bolt nut, the outer gasket size is not less than the outer diameter of the end of the cone, the angle between the web and the chord plane, the column There is also a certain relationship between the outer diameter of the shell, the outer diameter of the spherical shell, the distance between the bolt holes and the spherical shell of the upper and lower cylindrical shells.
From the point of view of bearing capacity, the dimensions of the various parts of the joint can be determined according to the formula of the ultimate bearing capacity of the new hollow bolt 1 ball joint given in the relevant data. When designing the node geometry, you can first select some geometric dimensions such as reference steel pipe and other dimensions, and then comprehensively analyze according to the calculation formula given in the relevant data to obtain the geometric dimensions of each part. According to the construction requirements, the node is finally determined. Geometric size.
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