NONLINEAR FINITE ELEMENT ANALYSIS OF LIGHTWEIGHT AGGREGATE REINFORCED CONCRETE SLABS
Journal Title: IJSR-International Journal Of Scientific Research - Year 2018, Vol 8, Issue 4
Abstract
This paper presents a nonlinear finite element analysis of lightweight aggregate reinforced concrete slab. In this study, the slabs were modelled using ANSYS V.15 nonlinear finite element software. The concrete is modelled using 'SOLID65'- eight-node brick element, which is capable of brittle materials and the tension reinforcement has been modelled discretely using 'LINK180'-3D spar element. A total 6 slabs were analysed, out of which 3 were lightweight aggregate RC slabs and other 3 were normal weight aggregate RC slabs and grade of concrete used was M30 for all the slabs. The slab had an overall dimension of 1500x1000x70 mm. The main and distribution steel was of 8 mm diameter. The spacing of the main reinforcement of three slabs was 150,175,200 mm respectively. The slabs were studied for ultimate load, load-deflection behaviour for each case and compared with the available experimental values. The above study indicates that finite element modelling is properly able to simulate the behaviour and strength of lightweight aggregate RC slab and normal weight aggregate RC slabs under flexure. The comparison study showed that the FEA predicts a variation in deflection studies, the ratio of FE model deflection to experimental deflection being and also the ultimate load predicted by FE model is lesser than experimental by a variation of %.
Authors and Affiliations
Anil Kumar R, Dr Prakash P
Keywords
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