Behaviour of green ultra-high-performance concrete beams with corrosion resistant alloy steel (MMFX) bars

Abstract

The aim of this study is to investigate the efficiency of using green ultra-high-performance concrete (GUHPC) with corrosion resistant alloy steel (MMFX) Bars in overcoming concrete cracking and steel corrosion, which will help in reducing inspection, maintenance, and repair works. To do so, a nonlinear finite element (FE) analysis was carried-out to model full-scale concrete beams which are often subjected to cracks during its service life time. The obtained results were compared with experimental data and the comparison was most satisfactory. In addition, a comparison was made between the proposed materials and traditional reinforced concrete in terms of crack widths, the intensity of cracks and service life period. The obtained results showed that using GUHPC and MMFX as a construction material in concrete structures provides high stiffness, high strength, enhanced service life and crack control beside its cost efficiency.

Constitutive modeling and numerical simulations for dynamic strain aging in MMFX steel at elevated temperatures

“…Martensitic Microcomposite Formable Steel (MMFX) alloy is an innovative material widely used in structural applications due to its outstanding corrosion resistance, low maintenance cost, and high yield strength [15,52,65]. In addition, MMFX has a high ductility, and structures made of this material have a long service life of more than a hundred years [40]. Despite its fast-growing demand for real-world applications, most of the research regarding this material has been focused on its corrosion resistance [12,19,40,41].…”

“…In addition, MMFX has a high ductility, and structures made of this material have a long service life of more than a hundred years [40]. Despite its fast-growing demand for real-world applications, most of the research regarding this material has been focused on its corrosion resistance [12,19,40,41]. In addition, although diverse types of constitutive models have been proposed to investigate the mechanical behaviors of diverse materials such as metals and alloys [29,44,61], nanopaper [38], polyampholyte gel [54], shape-memory alloys [13,18,60], high-entropy alloys [6,9,27,62], elastomers [30,33,64], and neo-Hookean material [10,22,23], very limited studies have been performed to investigate the mechanical behavior of MMFX, in particular, under extreme loading conditions [1,14].…”