Experimental Study on Flexural Behavior of UHPC-Light-Gauge Steel Stud Sandwich Insulated Wall Panel Under Four-Point Bending Support
摘要
This paper investigates the flexural behaviorFlexural behavior of UHPCUltra-High Performance Concrete (UHPC)-light steelSteel framed sandwich insulated wall panelsWall panel (UHPCUltra-High Performance Concrete (UHPC)-LGSS) through four-point bending tests. The experimental results revealed that the load-deflection curve exhibited two predominant phases: an elastic stage and a plastic development stage, with an elastic stiffness of approximately 7.45 kN/mm. When the wall panelWall panel reached an ultimate deflection of 62 mm, the corresponding ultimate failure load was 327 kN, demonstrating substantial load-bearing capacity and favorable ductility that satisfy the service requirements for external cladding panels in framed structures. The deflection distribution of the wall panelWall panel exhibited a predictable pattern: maximum deflections were consistently concentrated at mid-span cross-sections across all spans; a pronounced span effect was observed in mid-span deflections, with longer spans exhibiting significantly greater mid-span deflections compared to shorter spans; and warping deformations were observed at the four corners of the panel. Notably, the end spans of the light-gauge steelSteel studs constituted the weakest zones and were the first to undergo yielding.