Abstract
This study investigates the effect of the load eccentricity on the deep beams, in terms of failure load and failure mode, using ANSYS nonlinear finite element program. Three RC deep beams with shear span to depth ratios, varying from 0.91 to 1.67 are modeled. A comparison between the experimental and numerical results, under central load, showed approximately full matching between them. This had been done in order to ensure that the model was represented properly. The used model for investigating the behavior of the RC deep beams under an eccentric load with various heights of beams showed that under eccentric load there was a significant reduction in the failure load. Increasing the beams height cause of an increase (gradually) of the failure load with the incremental increases of the height, also there was a clear reduction in the failure load due to eccentricity. For the load eccentricity value 50 mm all the beams of different heights possess the same failure load and all of them failed due to concrete crushing at the beam compression face.
Highlights
RC deep beam are widely used elements in buildings, bridges, infrastructures, high-rise buildings as load-distributing structural parts of transfer girders, in multistory buildings to provide column offsets, wall footing, foundation pile caps, walls of rectangular tanks and bins, floor diaphragms, and shear walls [1]
The behavior of the reinforced concrete deep beams are influenced by many factors, such as clear span/ depth ratio, shear span / depth ratio, type of loading, position of the load, amount and type of web reinforcement, concrete strength [2]
Patil et al [6] worked on analyzed a deep beams subjected to two loading points with three different L/D ratios (1.5, 1.6, 1.71) using a Non-linear finite element method (ANSYS 9.0 software)
Summary
RC deep beam are widely used elements in buildings, bridges, infrastructures, high-rise buildings as load-distributing structural parts of transfer girders, in multistory buildings to provide column offsets, wall footing, foundation pile caps, walls of rectangular tanks and bins, floor diaphragms, and shear walls [1]. Lafta and Kun YE [9] used the ANSYS finite element program to study the behavior of indirectly loaded deep reinforced concrete (RC) of T-beams, A total number of 21deep RC T-beams were divided into three groups according to their Kim etal [14] worked an empirical studies on a reinforced concrete deep beam behaviors under mutual bending and the axial loads in order to inspect the effect of the axial loads on structural performance of the reinforced concrete deep beams; samples of various (shear span/depth) ratios were exposured to an axial loads of 235 kN or 470 kN They observed that the structural behaviors such as, load deflection response, strain in concrete and steel bar.
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