A Novel Hybrid Model of Reinforced Concrete Deep Beams With Curved Hybridization

Abstract

In the present study, a new model of hybrid deep beams has been proposed and discussed. Six specimens are tested experimentally with two types of loading which are one-point and two-point loading and two hybridization models for concrete section. It is aimed from this study to search for the optimum distribution of the concrete types of the hybrid deep beams such that the lowest cost and weight to be reached with keeping the capacity without significant reduction. All specimens had the same dimensions, overall span of 1700 mm, 180 mm wide and 450 mm overall depth and the same steel reinforcement details. Results showed an increase in the capacity in the horizontal and the arched hybrid model by 27.6% and 39%, respectively, with one-point system. Moreover, toughness, enhanced by 44% and 131% for the two models respectively whereas, stiffness enhanced by 6.5% and 34.2% respectively and ductility enhanced by 0% and 31.2% respectively. For tests under two point loads, capacity enhanced by 34% and 36.9%, respectively, Toughness increased by 188% and 301% respectively. Stiffness enhanced by 7.5% and 29.4% respectively. Ductility enhanced by 40.3% and 95.1% respectively.

Effect of the arching action on the behavior of the RC precast concrete deep beams: comparison between several hybrid models

“…Consequently, significant enhancement in the performance of the deep beams. Several models of arching for the precast RC deep beams were proposed by Shakir and Hannon [21,22]. It was aimed to reduce the cost of deep beams by using the high strength concrete (steel fiber or reactive powder concrete) within the arching region only.…”

Sustainable precast composite deep beams including concrete with partial replacement (50%) of recycled coarse aggregate

“…A series of innovative models of precast composite deep beams was proposed by Shakir and Hannon [22][23][24]. These model were based on the arching action and tied arch effects to consider the strength , weight and cost aspects.…”

Anti-Impact Performance Enhancement of Two-Way Spanning Slab through the Implementation of Steel Trussed Bars

“…Concrete structures, especially those fortifed with reinforcements, confront both localized and extensive deterioration in the face of such exigencies, their manifestation infuenced by a confuence of variables such as the magnitude of the force exerted and the inherent vibrational properties of the structure [2]. Pioneering experiments conducted on concrete elements, encompassing beams [3][4][5][6][7][8][9][10][11][12], columns [12][13][14], bridge piers [15], and slabs [16] have provided the foundational framework for comprehending the manner in which structures react to unanticipated and formidable forces [17]. Emphasizing the mechanisms of failure and resistance inherent to these components, historical studies have often adopted scaled-down replicas for pragmatic purposes, thereby facilitating practical insights into the behavior of concrete structures under duress.…”