Full-scale flexural testing of slabs made of modular structural concrete insulated panels

Abstract

Structural concrete insulated panels (SCIPs) are an alternative construction technology to traditional wood framing and masonry units for use in residential homes and low-rise structures. SCIPs can be used to erect structurally sound buildings that are economi­cal, energy efficient, and durable while incorporating sandwich technology. This study presents a novel type of SCIP that can be fabricated using off-the-shelf components. A precasting technology for such modular SCIPs is proposed. Full-scale experimental testing of one-way SCIP slabs with three different span lengths (short, medium, and long) was carried out to investigate flexural behavior, strength, ductility, and failure mechanisms. Testing showed good performance of modular SCIPs under gravity loads. Appropriate splicing details for longer-span SCIPs are developed and tested. Results show that the SCIPs tested in this research can provide a moment capacity equal to 66% of the capacity of a fully composite section.

Cyclic flexural performance of precast lightweight aggregate concrete insulation panels

“…In particular, Yang and Mun 6 reported that the lightweight aggregate concrete panels with a hollow cross‐section reinforced with a wire mesh and embedded with insulation could achieve sufficient flexural moment capacity and ductility comparable to conventional reinforced concrete beams with a minimum amount of longitudinal reinforcing bars. However, these studies tested the flexural behavior for simply supported panels subjected to monotonic load 5,6 without considering the constraint condition in the actual panel‐to‐base and ‐beam joints. Therefore, studies on verifying the structural safety of connecting joints are limited 5–9 …”

“…However, these studies tested the flexural behavior for simply supported panels subjected to monotonic load 5,6 without considering the constraint condition in the actual panel‐to‐base and ‐beam joints. Therefore, studies on verifying the structural safety of connecting joints are limited 5–9 …”

“…2 In addition, the sections with two concrete wythes overlaid on both sides of insulation have a structural limitation in achieving 100% of the composite action between two materials, 1 because two concrete wythes and an insulator act independently, resulting in the significant slip. 3 Several researchers [4][5][6] recently proposed a producing technique that combines insulating concrete with wire mesh, deformed reinforcing bars, or glass fiber reinforcing polymer bars, acting as two concrete wythes and insulation, to compensate for the low mechanical properties of insulating concrete. Acharya et al 5 suggested the arrangement details of reinforcing bars to enhance the composite action of insulating concrete and insulation effectively.…”

“…3 Several researchers [4][5][6] recently proposed a producing technique that combines insulating concrete with wire mesh, deformed reinforcing bars, or glass fiber reinforcing polymer bars, acting as two concrete wythes and insulation, to compensate for the low mechanical properties of insulating concrete. Acharya et al 5 suggested the arrangement details of reinforcing bars to enhance the composite action of insulating concrete and insulation effectively. In particular, Yang and Mun 6 reported that the lightweight aggregate concrete panels with a hollow cross-section reinforced with a wire mesh and embedded with insulation could achieve sufficient flexural moment capacity and ductility comparable to conventional reinforced concrete beams with a minimum amount of longitudinal reinforcing bars.…”

“…Therefore, studies on verifying the structural safety of connecting joints are limited. [5][6][7][8][9] Kim et al 10 reported that the design method of the panel-to-base joint had a significant effect on the moment and ductility capacities and that the introduction of insufficient constraints in the panel-to-base joint resulted in a considerable pinching effect in the lateral loaddisplacement relationship. Yang 11 also emphasized that the constraint degree of the panel-to-base joint affected the overall flexural behavior and reported that the crack propagations and flexural behavior of the panels with conventional splice sleeve joints in the panel-to-base connection differed from those obtained with simply supported panels.…”