Performance of Geogrid Reinforced Concrete Slabs under Drop Weight Impact Loading

Abstract

Reinforced concrete (RC) structures are often subjected to extreme dynamic loading conditions, mainly caused by effects of impact loading. A countable studies have been carried out on the structural behaviour of RC slabs under static and dynamic loadings. However, it is relatively infrequent to examine the impact behaviour of RC slabs that are embedded with non-conventional reinforcement layouts. Consequently, an experimental study was performed to examine the impact behaviour of geogrid reinforced concrete slabs. A total of six RC slab specimens embedded with different combination of steel and geogrid reinforcement layers was tested under drop weight impact test. The impact response in terms of failure modes, impact energy, impact ductility index and maximum deflection produced at each impact blow were studied. The results showed that, the RC slab specimens provided with geogrid reinforcement layer at both faces of slab specimens along with the conventional reinforcement resisted the crushing of concrete by spreading the impact stress to a larger area. This configuration of reinforcement also helps to withstand for higher impact forces, thereby influencing the enrichment in impact energy and impact ductility index.

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

“…Various methodologies and materials have been employed to enhance the durability of slabs under both static and dynamic loading conditions. Tese include shear studs [18], basalt fber-reinforced polymer (FRP) strips [19], hybrid fbers comprising hooked-end steel, polypropylene, and Kevlar [20], high-performance fber-reinforced cementitious composites (HPFRCCs) [21], prestressed concrete [22,23], ferrocement [24], internal anchorage stirrups [25][26][27], Wshaped stirrups [28], truss shear reinforcement [29][30][31], steel plates and slurry-infltrated mat concrete (SIMCON) laminates [32,33], polypropylene fber [33], geogrids [34], and carbon textiles [35]. Increasing the thickness of the slab has demonstrated efcacy in reducing damage and altering failure modes [36], while employing higher-grade concrete has shown some advantages in mitigating slab puncture [37][38][39][40][41].…”

“…Te research approach includes a detailed comparison through computational simulations, essential for guiding design decisions in particular structural settings. Following the implementation of these reinforcement techniques [32][33][34][35][36][37], there was a noticeable transition in the primary failure mechanism from direct crushing to bending. Additionally, certain strategies have been shown to combine bending with specifc localized crushing efects, as noted in earlier investigations [25][26][27]29].…”

Structural Behavior of Concrete Beams Reinforced with Biaxial Geogrid

“…In recent developments, steel reinforcement has been replaced in concrete by the inclusion of synthetic fibers, glass, rubber, and plastics, or natural fibers such as jute, sisal, coconut, and hemp [20][21][22][23][24][25][26]. To improve the tensile strength of concrete, polymer sheets, plates, and carbon sheets have also been evaluated experimentally [27][28][29][30]. The presence of fibers in corroded beams clearly demonstrated that the fibers provided approximately 18% more strength to the corroded beams at the loading stage than the control beam before failure [31][32][33].…”

“…The results revealed that the treaded reinforcements behaved better in terms of the energy absorption and ductility properties. Geogrid-reinforced concrete (GRC) slabs were evaluated under the drop weight impact tests [27]. The results illustrated that the GRC slab specimens effectively resisted the impact force better than the RC slab specimen.…”