An experimental behaviour of RCC rectangular beams with U-shaped encased welded wire mesh under torsion phenomena

Abstract

Concrete is one form of composite material composed of fine and coarse aggregate bonded together with cementitious paste that is durable in its hardened state over time. Although it is robust in compression, it has a brittle material property in tension. Axial and shear forces, bending moments, and torsion moments may arise in the concrete body in a reinforced concrete design depending on the loading conditions. In this sequel, the encased welded wire mesh with high yield strength is used in order to improve composite material characteristics and reduce abrupt cracking with an increase in torque carrying capacity of concrete specimens. A total of 18 beam specimens were casted and tested under pure torsion, in that six numbers were control specimens and the remaining twelve numbers were specimens with encased welded wire mesh. U-shaped wrapped WWM, both in the form of transverse strips and continuous U-shaped sheets are used to observe enhancement in the cracking and ultimate torsional strength of plain and RCC rectangular beams respectively. The curves of tested specimens containing WWM wrapping patterns showed the specimens containing WWM resist more torsional loads as compared to control specimens. The ultimate torque get increased effectively due to the introduction of U-shaped WWM wrap in fully reinforcement type means longitudinal reinforcement with closed stirrups beam specimens.