Torsional response of fibrous reinforced concrete members: Effect of single type of reinforcement

Effect of fibre aspect ratio on the torsional behaviour of steel fibre-reinforced normal weight concrete and lightweight concrete

“…7). After the cement matrix fractures and cracks start to propagate, the crack bridging effect of steel fibre holds the cracked cement matrix together by the fibre-matrix interfacial bond and blunts or diverts the crack propagation [6,37,43]. This allows the concrete to sustain a higher energy capacity after the crack initiates before it reaches the ultimate capacity.…”

“…The crack bridging effect is more evident for improving the post-cracking torsional behaviour of the NWFRC mixes [3,6]. Besides the improved ultimate torque, the ultimate twist of NWFRC increased by 112-117% to 0.052 rad/m, compared to NWC with an ultimate twist of 0.024 rad/m.…”

“…Previous literature has shown that the addition of steel fibres enhanced the ultimate torsional strength and post-cracking torsional behaviour of concrete including OPSC [3,5,6,30]. Previous study on the OPSC and OPSFRC un-reinforced concrete prisms showed that the use of steel fibre with aspect ratio 65 produced significant improved torsional strength and cracking resistance [30].…”

“…In structures with the combined forces, the design procedures are normally based on the force interactions, and, hence, the behaviours of the members under pure torsion need to be known and quantified [2]. There have been numerous studies concerning the torsional resistance of concrete in recent years [1][2][3][4][5][6][7][8][9]. The studies showed the significance of the torsion design.…”

Experimental study of torsional strength of RC beams constructed with HPFRC composite mortar

“…The pure torsion test setup was designed based on previous research [2,3,[20][21][22][23]. Details of the test setup are shown in Fig.…”