The Earthquake Engineering Online Archive

General purpose computer program for inelastic dynamic response of plane structures

Kanaan, Amin E.; Powell, Graham H.

UCB/EERC-73/06, Earthquake Engineering Research Center, University of California, Berkeley, 1973-04, 158 pages (530/K22/1973)

A computer program for the dynamic response analysis of inelastic plane structures of arbitrary configuration is described. The program consists of a series of "base" subroutines which carry out a step-by-step dynamic analysis. Subroutines for structural elements of a variety of types may be developed independently and added to the base program. Subroutines for arbitrarily oriented truss elements, arbitrarily oriented beam-column elements, infill shear panel elements and semi-rigid connection elements have been developed and are described. The direct stiffness method is reviewed, with particular emphasis on the selection of displacement and deformation degrees-of-freedom. The step-by-step dynamic analysis procedure for inelastic structures is considered in detail. Instructions to be followed when adding new elements to the program are presented. A number of example structures have been analyzed and the results compared with those obtained by other workers. The agreement is very close in most cases. A computer program user's guide and listings of the input data for several example problems are included.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-73-06.pdf (3 MB)