Experimental and numerical study on the anti-sliding performance of full-lock coil cable clamps

Abstract

The full-lock coil cable clamp node is an important joint in cable structures, and its sliding will reduce the bearing capacity and stability of the structure. Based on cable clamp node slide resistance tests and finite element analyses, the bolt pre-tightening force, cable tensioning sequence, and parameters such as the cable diameter were investigated to determine their influence on the cable clamp slide resistance. The stress distribution and variation in cable in the process of cable clamp sliding with steel wire was obtained. The main conclusions are as follows. (1) The bolt fastening force is basically proportional to the ultimate anti-slide bearing capacity of the cable clamp. The reduction coefficients for an 80 mm cable with initial fastening forces of 125 kN, 175 kN, and 225 kN are 0.49, 0.56, and 0.61, respectively. (2) Tensioning the cable first and then tightening the bolt can effectively improve the ultimate anti sliding bearing capacity of the cable clamp. The ultimate anti sliding bearing capacity of the cable clamp tested in this paper is increased by 38%. (3) Under the condition of the same initial fastening force, with increasing cable diameter, the sliding bearing capacity decreases linearly. (4) During cable clamp sliding, the stress of the cable in the slide direction of the cable clamp decreases, while the stress of the cable on the other side increases. (5) A calculation equation for the slide resistance ultimate bearing capacity of full-lock coil cable clamps considering the cable diameter and cable clamp length is obtained.