Parametric Study on Dynamic Behaviour of Waffle Slab

Vinit P. Thakor, Sardar Vallabhbhai Patel Institute of Technology ; Tushar N. Patel ,Sardar Vallabhbhai Patel Institute of Technology

Building Flexibility, Dynamic Behaviour

Nowadays, Multistorey Building which include Fitness centers, Parking garages, Super markets, offices, Food centers are trending worldwide. In which, Simple activities like walking, running skipping, jumping can generate vibration in the slab. This vibration can cause inconvenience in persons and questions about safety of structures and risk of collapse that is determined by its intensity of vibration. The objective of this paper is evaluating the behaviour of reinforced concrete waffle slab due to human rhythmatic activities and resonance. Waffle slab are modeled by element meshing method with ETABS with different plan aspect ratio. Here two types of dynamic analysis are performed: free vibration analysis for obtaining natural frequencies and mode shapes and forced vibration analysis to obtain Maximum displacement.
    [1] Yuri Cláudio Vieira da Costa Tereza Denyse de Araújo “Evaluation of dynamic behaviour of waffle slab to gym center” Latin American Journal of Solid and Structures 11 (2014) 1114-1131 [2] Allen, D. E.; Rainer, J. H.; Pernica, G. “Vibration criteria for assembly occupancies” Canadian Journal of Civil Engineering, 12, 3, pp. 617-623, 1985-09 [3] Pavic, A., Reynolds, P., Waldron, P., Bennet, K., (2001). “Dynamic modeling of post-tensioned concrete floors using finite element analysis” Finite Elements in Analysis and Design, 37: 305-323. [4] Rainer, J.H., Pernica, G., (1986) “Vertical dynamic forces from footsteps”. Canadian Journal of Civil Engineering, Canadian Acoustics, 14: 12-21. [5] C.M.R. Gaspar , J.G. Santos da Silva , L.F. Costa-Neves “vibration control of building steel–concrete composite floors submitted to human rhythmic activities” Computers and structures 165 (2016) 107-12 [6] C.J. Middleton, J.M.W. Brownjohn “Response of high frequency floors: A literature review” Engineering Structures 32 (2010) 337–35 [7] Indrajit Chowdhury and Jitendra P. Singh, “Analysis and Design of Waffle Slab with Different Boundary Conditions”, Indian Concrete Journal, vol.5, pp1-10 9, 2010 [8] Alaa C. Galeb, Zainab F. Atiyah , “ Optimum design of reinforced concrete waffle slabs”, IJCSE, vol.1, n0 .4, pp862-880, 2011 [9] Anjaly Somasekhar and Preetha Prabhakaran , “Analytical Investigation on Performance of Stiffened Waffle Slabs with Openings”, IOSR- JMCE, vol.4,pp8-13,2016 [10] Bachmann, H., Ammann, W.J., Deischl, F., Eisenmann, J., Floegl, I., Hirsch, G.H., Klein, G.H., Lande, G.J., Mahrenholtz, O., Natke, H.G., Nussbaumer, H., Pretlove, A., Rainer, J.H., Saemann, E., and Steinbeisser, L., (1995). “Vibration problems in structures. Practical guidelines.” Berlin:Birkhauser [11] ABNT – Brazilian Association of Technical Codes (2003). NBR 6118: Projetos de estruturas de concreto: proce- dimentos. Rio de Janeiro, Brazil.
Paper ID: GRDCF012044
Published in: Conference : Emerging Research and Innovations in Civil Engineering
Page(s): 209 - 213