Experimental Study on Variable-Amplitude Fatigue of Welded Cross Plate-Hollow Sphere Joints in Grid Structures

Table 1

Geometrical characteristics of the specimens (unit: mm).

Specimen label	Tested number				Connection type
KQ-4	5				Butt weld
KQ-5	7				Butt weld
KQ-7	2				Fillet weld

Note. , diameter of welded hollow sphere; , thickness of sphere; , diameter of steel tube; , thickness of steel tube; , width of crossed plate; , thickness of crossed plate; , limit strength ratio of steel tube welded sphere and cross plate welded sphere.