Coupled Lateral and Rocking Vibration of Footings with Internal Openings
C Savitha1, S Chandrakaran2, T M Madhavan Pillai3
1C Savitha, Department of Civil Engineering, National Institute of Technology, Calicut, (Kerala), India.
2Dr. S Chandrakaran, Department of Civil Engineering, National Institute of Technology, Calicut, (Kerala), India.
3Dr. T M Madhavan Pillai, Department of Civil Engineering, National Institute of Technology, Calicut, (Kerala), India.
Manuscript received on August 02, 2015. | Revised Manuscript received on August 14, 2015. | Manuscript published on August 15, 2015. | PP: 36-43 | Volume-3 Issue-9, August 2015. | Retrieval Number: I0930083915/2015©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A study on the vibration of square and circular foundation with concentric internal holes is presented in this paper. The foundations are assumed to be rigid and embedded in, isotropic and linear elastic half-space and are subjected to coupled lateral and rocking excitation. This problem is analysed using an approximate method. The results are presented in frequency domain. Effects of embedment, mass ratio, ratio of inner to outer diameter (circular footing) or inner to outer width of the footing (square footing) and backfill are conducted to assess the behaviour. The accuracy and efficiency of the model are assessed on the basis of comparison studies with published literature. The results show that the embedment substantially affects the response in that it reduces the peak amplitudes and increases the corresponding frequencies.
Keywords: Embedment, Footing, Lateral vibration, Rocking vibration.