%0 Journal Article %T Effect of Vertical Vibration on Block Foundation Resting on Homogeneous and Layered Medium %A Ankesh Kumar %A Dr. Bappaditya Manna %A Prof. K. S. Rao %J International Journal of Engineering Research %V 2 %N 7 %P 452-456 %D 2014 %I IJER %X In the present study, an investigation is carried out to determine the effect of soil每rock and rock每rock foundation systems on dynamic response of block foundations under vertical mode of vibration. The half-space theory is used for the analysis of foundation resting on homogeneous soil and rocks. The finite element program having transmitting boundaries is considered for layered system considering soil每rock and rock每rock combinations. The analysis is carried out in details for soil每 rock and weathered rock每rock systems and the different equations are presented for above combinations. The effect of top layer thicknesses, shear wave velocity and eccentric moments are also simulated. The rock每rock systems considered are sandstone, shale and limestone underlain by basalt rock. It is interpreted that as the shear wave velocity ratio increase the natural frequency increases and the peak displacement amplitude decreases. %K Block foundation %K Vertical vibration %K Soil每rock %K Rock每rock %U http://www.ijer.in/ijer/publication/v2s7/IJER_2013_709.pdf