Analysis of Simply Supported RC Skew Slabs Subjected to UDL using FEM Technique

Naresh Reddy G N; Sunil Kumar Tengli; Vismitha K

Naresh Reddy G N Assistant Professor, School of Civil Engineering, REVA University, Rukmini Knowledge Park, Kattigenahalli, Yelahanka, Bangalore-64, India.
Sunil Kumar Tengli Professor, School of Civil Engineering, REVA University, Rukmini Knowledge Park, Kattigenahalli, Yelahanka, Bangalore-64, India.
Vismitha K PG Student, School of Civil Engineering, REVA University, Rukmini Knowledge Park, Kattigenahalli, Yelahanka, Bangalore-64, India.

Keywords: Reinforced concrete, slabs, skew, skew slabs, skew angle, analysis, FEM, ANSYS, load-deflection

Abstract

Reinforced concrete slab is an important structural element in construction. Usually, slabs are orthogonal in shape, however in case of bridge decks the slabs are cast with a skew angle. In case of skew slabs, the analysis is usually done by strip method or yield line analysis, but the membrane action due to in-plane stresses are not considered. Due to the skew angle, the behaviour of a skew slab is different compared to orthogonal slab, so there is need to understand their behaviour under various boundary conditions and loading patterns. In the present paper, experimental data of 4 simply supported skew slabs of skew angle 15° with different spacing of reinforcement is taken for Finite Element modelling and analysis. Finite element modelling of 4 simply supported reinforced concrete skew slabs were made and the non-linear analysis carried out to obtain load deflection behaviour under uniformly distributed loading. For the analysis, a commercial Finite Element Software ANSYS version 18.1 is used. Also, a comparison is made between the results obtained by ANSYS and the experimental results.

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