SURFACE RESPONSE ANALYSIS OF A DIPPING LAYER BY RAY THEORY CONSIDERING EFFECT OF DIFFRACTED WAVES

Abstract

In this paper, an approximate solution which is taking the elfect of diffracted waves into account is presented for the surface ground motion Qf a dippingIlayer . 』 It iSi based on しhe ray theory . This method cosidered the wave component whlch propagated along the surface from the egde of a dipping Layer as diffracted waves . Comparison of results w .ith the boundary element method shows very good agreement at lower computational cost . Frequency responces and time domain results are presented for.diflerent property contrasts and inciClence angles . This method is suited to study for the surfac β response of analysis of dipping layer, due to its low cost and no upPer frequency limit . . ・ Kegwonts :ray thllory , diff 厂acted wave , amptitude discontinuity ,漉卿 η9 勿 σ 波線理論,回折波,変位の不連続量 ,傾斜層