SHEAR RESISTANCE OF MRPC LIGHTWEIGHT CONCRETE BEAMS WITHOUT STIRRUPS

Abstract

Shear behavior of (9) modified reactive powder lightweight concrete beams (MRPLWC) beams without web reinforcement under two point loading system, are studied. A number of variables are used to show their effects on the diagonal cracking load and ultimate shear load. Those variables are: volume fraction of fiber (Vf), ratio of longitudinal reinforcement (ρ) and the ratio of the shear span to the effective depth (a/d). The test results show that the shear strength increased by increasing the volume fraction and the ratio of longitudinal reinforcement, while a reduction in shear capacity is noticed by increasing the ratio of shear span to effective depth (a/d).

Keywords

• shear capacity
• reactive powder concrete
• lightweight concrete
• rectangular beams
• diagonal cracking load
• ultimate shear load