Recent applications of sliding block theory to geotechnical design

The sliding block theory was proposed by Newmark for determining the perman ent displacement of embankments and darns under earthquake loading. This pa per highlights recent applications of sliding block theory to different geo technical structures. The equations to determine seismic factor of safety, yield acceleration and permanent displacement are given for rock block, soi l slope, landfill cover, geosynthetic-reinforced soil retaining wall, and c omposite breakwater. The presented equations for seismic stability degenera te to that of static stability in the absence of earthquake. The permanent displacement for various structures can be obtained from that of a horizont al sliding block through a correction factor. A simplified procedure is inc luded for the permanent displacement under vertical acceleration. The slidi ng block approach is rational for design under high seismic load. (C) 2001 Elsevier Science Ltd. All rights reserved.