NEHRP Clearinghouse

Title
DYNA1D: A Computer Program for Nonlinear Seismic Site Response Analysis Technical Documentation.
File
PB90161944.pdf
Author(s)
Prevost, J. H.
Source
National Center for Earthquake Engineering Research, Buffalo, NY.; National Science Foundation, Washington, DC., September 14, 1989, 132 p.
Abstract
The report describes DYNA1D, a finite element computer program for nonlinear seismic site response analysis. Dry, saturated and partially saturated deposits can be analyzed. DYNA1D has been developed to allow site response analyses to be performed taking into account: (1) the nonlinear, anisotropic and hysteretic stress-strain behavior of the soil materials; and (2) the effects of the transient flow of the pore water through the soil strata. The procedures used (field and constitutive equations) are general and applicable to multidimensional situations. The goal was to provide a realistic and reliable analysis procedure for use in engineering design practice. Therefore, although no sacrifices have been made as to the rigor and generality of the field and constitutive equations used, attempts have been made to simplify the use of the code. For that purpose, features such as automatic initialization procedures have been implemented. Also, required material constitutive parameters are identified in terms of classical soil mechanics parameters. In order to ease the interpretation of the analysis results, graphic display capabilities which allow plots of spatial and temporal variations of field components have been implemented.
Keywords
Risk; Earthquake engineering; Earthquake resistant structures; Earthquakes; DYNA1D computer program; Computer applications; Soil dynamics; Site surveys; Earth movements; Seismology