Experimental Study on Constant-Amplitude Fatigue Performance of Weld Toe in Steel Tube of Welded Hollow Spherical Joints in Grid Structures

Table 2

Gauge position and its ID.

Measuring point	Gauge ID	Gauge position
Steel tube	P1, P2	Middle of steel tube
	P3, P4	30 mm from weld toe
	P5, P6	15 mm from weld toe
	P7, P8	Weld toe
Hollow sphere	S1, S2	Weld toe
	S3, S4	1/4 of exterior arc
	S5, S6	1/2 of exterior arc