In order to analyze and simulate the collapse of reinforced concrete (RC) elements under fire, a novel numerical model based on the fiber beam model is proposed in this paper. By dividing the cross section of beam element into many small concrete and steel fibers and assigning different materials to each fiber, this model can consider the non-uniform temperature distribution across the section ...

This paper deals with the effect of steel fiber amounts and interaction between amount stirrup ratio on shear behavior capacity reinforced concrete (RC) deep beams fibers. The experimental program was carried out twelve different (0, 30, 40, 65 kg/m3) ratios (0.1, 0.15, 0.25%). test results have shown that use fibers increased resistance (up to 55%), reduced crack width 11 times) deflection 57%...

The continuous development of construction due to the great needs society and industry, need build newer more durable buildings have meant that scientists all time look for new opportunities improve quality materials used in this field. Above all, concrete, as material commonly construction, has been subject research many years order properties. Already antiquity there were first attempts modif...

This study presents an investigation about the effect of fire flame on punching shear strength hybrid fiber reinforced concrete flat plates. The main considered parameters are type (steel or glass) and burning steady-state temperatures (500 600°C). A total 9 half-scale plate specimens dimensions 1500mm×1500mm×100mm 1.5% volume fraction were cast divided into 3 groups. Each group consisted that ...

Using electromechanical technique, various conductive carbon fibers and graphite and steel filaments/epoxy micro-composites were evaluated by measuring electrical resistivity to investigate the interfacial properties including the microfailure modes and interfiber distance effect with a aid of acoustic emission (AE). Micromechanical techniques, such as pull-out and fragmentation tests, and elec...

Shape is a key characteristic to determine the quality of outgoing flat-rolled products in the steel industry. It is greatly influenced by flatness, a feature to describe how the surface of a rolled product approaches a plane. Flatness is of the utmost importance in steelmaking, since it is used by most downstream processes and customers for the acceptance or rejection of rolled products. Flatn...

In moment resisting reinforced concrete framed buildings, corner joints are found at the roof level. These joints, if designed for gravity loads and are based on pre-seismic codes, may suffer substantial damage during earthquakes particularly under opening cycles, i.e. those causing flexural tension on the inside of the joint. Several techniques of repair and strengthening of reinforced concret...

Three-dimensional printed concrete (3DPC) is emerging as a new building material. Due to automation, this method dramatically decreases construction time and material wastage while increasing quality. Despite the mentioned benefits, technology faces various issues. Among these issues, inability use steel bars for reinforcement early age cracking because of low water-to-binder ratio high amount ...

Abstract In this research article effect of steel fibers on workability and compressive strength recycled aggregate concrete is presented. Recycled aggregates from demolished waste were used in equal proportion with conventional aggregates. Steel 1 mm diameter 25 length used. For preparation 1:2:4 mix 0.55 water-cement ratio was Workability each checked by slump cone test. Total 40 samples prep...