Effects of Near-Fault Ground Shaking on Sliding Systems

A numerical study is presented for a rigid block supported through a frictional contact surface on a horizontal or an inclined plane, and subjected to horizontal or slope-parallel excitation. The latter is described with idealized pulses and near-fault seismic records strongly influenced by forward-directivity or fling-step effects (from Northridge, Kobe, Kocaeli, Chi-Chi, Aegion). In addition to the well known dependence of the resulting block slippage on variables such as the peak base velocity, the peak base acceleration, and the critical acceleration ratio, our study has consistently and repeatedly revealed a profound sensitivity of both maximum and residual slippage: (1) on the sequence and even the details of the pulses contained in the excitation and (2) on the direction (+ or - ) in which the shaking of the inclined plane is imposed. By contrast, the slippage is not affected to any measurable degree by even the strongest vertical components of the accelerograms. Moreover, the slippage from a specific record may often be poorly correlated with its Arias intensity. These findings may contradict some of the prevailing beliefs that emanate from statistical correlation studies. The upper-bound sliding displacements from near-fault excitations may substantially exceed the values obtained from some of the currently available design charts.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/35194342
• Authors:
  • Gazetas, G
  • Garini, E
  • Anastasopoulos, I
  • Georgarakos, T
• Publication Date: 2009-12

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Illustrations; References;
• Pagination: pp 1906-1921
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 135
  • Issue Number: 12
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Asymmetry; Dislocation (Geology); Earthquakes; Faults; Numerical analysis; Seismicity; Sliding friction; Symmetry
• Uncontrolled Terms: Accelerograms; Earthquake shaking; Slippage (Movement)
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01150915
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 19 2010 10:59AM