Experimental study and assessment of the structural performance of laced reinforced concrete beams against reverse cyclic loading

Abstract

This experimental research evaluates the structural performance of laced reinforced concrete beams in comparison to conventional reinforced concrete beams (RC-90) under reverse cyclic loading. Visual inspection revealed that LRC-45 exhibited superior crack resistance, even at high displacements, unlike RC-90, which displayed vertical cleavages and diagonal tension cracks. RC-90 demonstrated minimal ductility, initiating cracking at lower loads. Hysteresis response curves showed LRC-45 outperforming RC-90 in terms of cracking load and maximum load, with higher displacement capacity. The ductility factor of LRC-45 was 56.39% higher. Notably, LRC-45 exhibited a substantial 143.43% increase in cumulative energy dissipation, highlighting its superior energy-absorbing capacity. Additionally, stiffness analysis indicated significantly higher stiffness in LRC-45. The numerical analysis supported experimental findings, emphasizing the potential of laced reinforcement in enhancing structural resilience, energy dissipation, and stiffness. The novelty lies in the remarkable improvements offered by LRC-45, particularly its enhanced energy-absorbing capacity and stiffness, which are crucial for structures subjected to dynamic loads, such as seismic events.

Environment friendly sustainable concrete produced from marble waste powder

“…Economic analysis and regression equations validate the findings, meeting Indian concrete specifications. Upadhya et al identifed the optimal prediction model for Marshall Stability and Bitumen Content in carbon fiber reinforced asphalt concrete for flexible pavements [32]. Five machine learning techniques were applied, with Random Forest showing the best performance.…”