Amplification of waves by an orthotropic basin: sagittal plane motion

✍ Scribed by Zheng, Tao; Dravinski, Marijan

• Book ID: 101219952
• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 181 KB
• Volume: 28
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(199906)28:6<565::aid-eqe825>3.0.co;2-q

✦ Synopsis

Scattering of elastic waves by an orthotropic basin of arbitrary shape embedded in a half-space is investigated for the sagittal plane motion using an indirect boundary integral equation approach. Steady-state results were obtained for incident plane harmonic pseudo P-, S-, and Rayleigh waves. Detailed convergence analysis of the method is presented. Green's functions are evaluated by using adaptive Newton -Cotes or Filon quadratures. Surface ground motion is presented for semicircular and semielliptical basins with di erent material properties and various angles of incidence. The results show that surface motion strongly depends upon nature of incident wave, geometry and material properties of the basin, and location of the observation point. Comparison with isotropic basin response demonstrates that anisotropy is very important in ampliÿcation of surface ground motion.