Experimental Study on Tensile Performance of Embedded Truss-Type Curtain Wall Connections in Insulated Sandwich Wall Panels

In this paper， a truss-type curtain wall connection was proposed， which used embedded steel bar trusses to connect the insulated sandwich wall panels and curtain wall systems. Considering different steel truss web member diameters （8， 10，12 mm）， spacing of welding joints on the inner truss chord member （100，130 mm）， and insulation layer thickness （80，120 mm）， tensile mechanical performance tests were conducted on five curtain wall connection specimens to study the failure process， load-displacement relationships， tensile strength and deformation capabilities of the connection specimens. The experimental results indicated that the tensile failure modes of the embedded truss-type curtain wall connections included the cracking and spalling of local concrete on the inner side of the anchor plate， flexural yielding of the anchor plate， and fracture failure of welding joints on the outer truss chord member. During the tests， no anchorage failure occurred between the inner leaf plate and the embedded steel trusses. All connection specimens exhibited comparable yield strength， with tensile strength not only satisfying the design load requirements but also exhibiting substantial safety margins. Increasing the steel truss web member diameter can increase both the tensile strength and plastic deformation capability of the curtain wall connection， while the spacing of welding joints on the inner truss chord member and the thickness of the insulation layer showed little influence on these mechanical properties.