A Mesh Grading Technique for Near-fault Seismic Wave Propagation in Large Velocity-contrast Viscoelastic Earth Media. Issue 3 (17th February 2022)

• Record Type: Journal Article
• Authors: Zhong, Wei; Liu, Tielin
• Is Part Of: Journal of earthquake engineering. Volume 26:Issue 3(2022)
• Page Start: 1388
• Page End: 1415
• Publication Date: 2022-02-17
• Subjects: Large velocity-contrast media -- Soil interlayer -- Sedimentary basin -- Viscoelastic earth medium -- Near fault -- Investigated lump; Earthquake engineering -- Periodicals; 624.1762
• DOI: 10.1080/13632469.2020.1719240
• Languages: English
• ISSNs: 1363-2469

Abstract

ABSTRACT: Seismic ground motions at a site are greatly affected by nearby many factors, such as strong heterogeneity, irregular interface, topographic relief, and large attenuation. To consider such factors, a simple triangular mesh grading technique is proposed for the efficient simulation of viscoelastic wave bidirectional propagation at irregular interface of large velocity-contrast earth media with rugged topography. The ground motions from finite-fault seismic source of a M w 5.2 hypothetical earthquake are simulated. The simulation results showed that the existence of soil basin and interlayer can impact greatly ground motions, and should be considered in studying ground motions.