Effects of Shear Lag on L-Shaped Reinforced Concrete Load Bearing Walls

Abstract

Reinforced concrete structural walls are a premier safety net used for resisting seismic lateral loads. The effect that occurred as a result of nonlinear distribution of normal stress or strain across a component due to shear distortions is called shear lag.To perceive the effects of shear lag on the non linear static response of the non-homogenous shape, 3D simulation analyses was applied to the L– shaped reinforced concrete structural wall subjected to apply loading. Virtually no studies have been conducted on the shear lag effects of these types of walls with the same parameters. This research investigates the effects of shear lag in reinforced concrete L–shaped structural load bearing wall using ANSYS non-linear static finite element software. During this study, Extensive number(28) modeling is conducted by inclusive of different parameters such as effective flange width, flange thickness, web length, web thickness, cross sectional dimension, rebar detailing, loading types and load path estimate the vertical distribution of the strain along the flange and web of the same stated wall. The results of this research work indicate, shear lag effect is reduced as the height of the wall increased. Since, the height of wall upturn 1m to 3.5m, effect of shear lag reduction by 12.05% . The flange width of the wall increases 1m to 2m the effect of shear lag not change the output result this means the max strain value is 0.00278. The load is applied at the connection of wall the shear lag effect is also indicated. However the strain value occurred in that area is above the capacity of concrete. Therefore reinforcement diameter and spacing has significant influence on the shear lag effects