ABSTRACT
Depending upon the area seismicity, site conditions and the nature of the proposed construction a geotechnical site investigation may be necessary to alow adequate definition of seismic hazard and related structure design criteria, In any event, the structural engineer and the geotechnical engineer must effectively cooperate in order to ensure that the building code provisions are adequately extended to effectively address existing geological hazard abd potential for aggravated soil amplification of ground motion or ground failure. This paper provides a summary description of two of the problems introduced by the geotechnical site conditions (liquefaction and resonance) and presents evaluations methods. It is important that the structural engineer realize the importance of the local site conditions on the structural response (AU)
