The top face sheet in ICSIPs carries the compressive stress, and the bottom face sheet in ICSIPs carries the tensile stress.
Figure 2 illustrates the fabrication process of ICSIPs. The GFRP face sheet is bonded to the EPS core using a hot-melt thermoplastic spray adhesive.
Materials of ICSIPs. The thermoplastic composite bottom face sheet used for ICSIPs consists of 70% bidirectional glass-fibers impregnated with polypropylene resin.
The adhesive used in ICSIPs is a two-component high-temperature adhesive based on epoxy resin.
After curing for 28 days, the ICSIPs were finished.
Figure 5 shows the typical failure states of the ICSIPs. The results of the experiments show that the specimen fails in a brittle manner due to the crush of concrete.
The tensile and compressive strains are recorded from the strain gauges attached to the ICSIPs specimen, as plotted in Section 6.2.
The ICSIPs in this paper were analyzed using the universal finite-element software ANSYS .
In ICSIPs models, there is no relative movement between face sheets and EPS foam cores as they are glued together.
From the side-by-side comparison of stresses in three components of ICSIPs (Figure 7), it can be observed that the maximum stress of GFRP face sheet is 11.5 MPa, which occurs at the middle span.
The failure mode of ICSIPs is the crack of the recycled aggregate concrete top skin when the applied load reaches the ultimate strength.
And the flexural stiffness of ICSIPs was calculated using the sum of the flexural stiffness of the constituent parts about the center axis of the entire section.