Experimental and Numerical Study on Uniaxial Compression Failure of Concrete Confined by Nylon Ties

Abstract

The developments in the cisvil engineering fields have led to an increased demand for structural reinforcements. Therefore, designing an effective, green, convenient, and low-cost reinforcement method is considerably important. Nylon ties have high strength and good heat resistance, and they can retain good tensile properties after high-temperature cooling. Further, they are inexpensive and can be recycled. Thus, they are considered suitable for structural reinforcement engineering. In this study, the core concrete was reinforced by the active confinement of prestressed nylon ties. A uniaxial compression test was performed to evaluate the reinforcement effect of the preload generated by the high-temperature cooling of the tie rod on the core concrete. The results show that nylon ties can effectively improve the mechanical properties of the core concrete. Combined with numerical simulation technology, a damage model of a confined concrete column (CC) was established, and the damage evolution law of CC under uniaxial axial compression was analyzed. Combined with numerical simulation and experimental research, the effectiveness of nylon tie reinforced concrete and the reliability of the damage model were verified, providing a reference for research on engineering reinforcement.

Physical, mechanical, and durability properties of concrete containing different waste synthetic fibers for green environment – A critical review

“…The employment of waste synthetic fibers in the cement/concrete matrix enhanced the residual strength of the whole composite at elevated temperatures [ 13 , 36 ]. The same observation that reinforcing concrete by waste polyethylene and nylon fiber improves the resistance at high temperatures and good tensile strength retained after elevated temperatures [ 67 , 121 ]. This may be due to the reinforcing concrete by waste synthetic fiber tighten the concrete matrix cement paste with sand that makes a dense structure which elevated temperature cannot easily penetrate inside the matrix.…”