Dynamic analysis of thick plates on elastic foundations using Winkler foundation model

Dynamic analysis of rectangular thick plates on elastic foundations underpartially distributed and centrally concentrated impulsive load is presented using winklerfoundation model. an 8-noded (pbq8) mindlin plate element are adopted for modelingthe plate to account the transverse shear deformation eects neglected in the classical thinplate theory. selective reduced integration technique is used to avoid shear locking problemwhich occurs as thickness/span ratio decreases. the results obtained from the study arecompared with the solutions obtained by sap2000 software to show the validity of theelements. the variation of the maximum displacement with various values of subgradereaction modulus, aspect ratios, the ratio of plate thickness to shorter span of the plateand loaded area are investigated. numerical examples show the applicability of the 8-nodedelement to dynamic analysis of thick plates on elastic foundation subjected to external loadsusing winkler model.