Behavior and Modeling of Circular Large Rupture Strain FRP-Confined Ice under Axial Compression

The application of concrete is severely limited in construction cold areas. However, the local ice has functioned as a potential substitute for long time. In order to make efficient use overcome its weaknesses low strength and poor ductility, an innovative type ice-filled large rupture strain (LRS) fiber-reinforced polymer (FRP) tube column was developed. system consists external LRS FRP tubes filled with plain or sawdust-reinforced ice. This paper presents experimental investigation into axial compressive behavior such composite stub columns circular sections. test results confirmed that cores greatly improved because confinement, well addition sawdust stress–strain curves FRP-confined exhibited monotonically ascending bilinear shapes. Both ultimate confined were significantly enhanced increase thickness tube. A theoretical model proposed, which dilation properties (i.e., lateral strain–axial relation), entire responses inner cores, are explicitly modeled reasonable accuracy.