Experimental on Mechanical Properties of Interlocking Cable-Membrane Connections in Double-Layer Orthogonal Cable Systems

The cable-membrane connection of the double-layer orthogonal cable system adopts an aluminum interlocking connection， and the interlocking connection exerts a clamping effect on the folded membrane through the assembled interlocking components. In order to explore the failure mode and mechanical properties of the cable-membrane interlocking connection， a static loading test was carried out. Four groups of comparative tests were designed to investigate the failure mode and bearing capacity of the connection. Factors such as the membrane folding angle and the ridge membrane protection measures were respectively considered. The failure mode and bearing capacity of the connection were obtained， and the stress distribution of the connection was analyzed using the finite element software. The experimental results indicated that when the strength of the membrane was insufficient， the membrane would tear along the edge of the end of the profile. When the strength of the membrane was sufficient， the penetrating rope would fall off and cause the connection to fail. The increase of the membrane folding angle would be beneficial to the deformation of the interlocking components. The weak positions of the interlocking connection were located at the middle of the interlocked side and the end of the interlocking side， respectively. At a 120° membrane folding angle， the bearing capacity of the connection with the protective membrane increased by 19.3%. At a 140° membrane folding angle， the protective membrane had little effect on the bearing capacity of the connection.