This issue of Structures and buildings contains five papers, which covers a broad range of civil engineering problems.
In the first paper, Beiraghi and Abadi (2024) compared different kinds of energy dissipation in reinforced concrete (RC) core–wall systems with two buckling-restrained braced outriggers. The forward-directivity near-fault and ordinary far-fault earthquakes, have been applied. Non-linear models were built for the comparison. The results show that the inelastic energy at the base from far-fault records is almost 1.5 times the corresponding value from near-fault records.
In the second paper, Puri et al. (2024) present performance assessment of bamboo bond strength in cement–fly ash mortar. Experiments method was used to quantify the impact of multiple factors affecting the bond strength then statistical models were formulated. The developed models were validated for the prediction of bond strength based on different factors. The developed statistical models were found to predict and simulate the experimental behavior of bond strength with sufficient accuracy.
In the third paper, Li et al. (2024) made an investigation on the flexural behaviour of hollow reinforced concrete-filled fibreglass tubular beams. Both experimental and numerical study were performed. The results indicated that the composite beams failed gradually with considerable ductility. The bending capacity increased by about 12% with every 1 mm increment of the fibreglass tube thickness, increased by about 40% as the reinforcement ratio increased from 2.28% to 4.56%, and increased by about 6% with every 5 MPa increment of the concrete strength. The bending capacity decreased and then increased as the fibre winding angles ranged from 10° to 90°, and a small fibre winding angle was preferable for the flexural member.
In the fourth paper, Liu et al. (2024) performed a Study on thermodynamic properties of RC beams considering elevated temperature. Fire and mechanical tests were carried out on four fully dimensioned simply supported beams. A numerical study was conducted as well. They found that the effect of spalling area ratio was relatively stable after more than 15%. Flexural bearing capacity shows a linear trend of decrease with increase in spalling depth. With the increase in spalling area ratio, it shows a power function of the decreasing trend.
In the fifth paper, Vougioukas et al. (2024) made a detailed study of Effect of loss of bond (LoB) on the behaviour of RC beams under service load conditions. A description of the effect of LoB on the function of RC beams is provided in this paper and this description is used as the basis for the derivation of a formula linking LoB with load-carrying capacity. The proposed formula is used for the structural assessment of the collapsed balcony, taking into account the design details, physical state and loading conditions of structural members similar to the one that collapsed.
