NEHRP Clearinghouse

3D-BASIS-TABS: Computer Program for Nonlinear Dynamic Analysis of Three Dimensional Base Isolated Structures.
Nagarajaiah, S.; Li, C.; Reinhorn, A. M.; Constantinou, M. C.
National Science Foundation, Washington, DC.; New York State Science and Technology Foundation, Albany., August 2, 1993, 192 p.
Identifying Number(s)
The new computer porgram 3D-BASIS-TABS, an extension of 3D-BASIS and ETABS, is a special purpose program developed for nonlinear dynamic analysis of three dimensional base isolated structures. The program can analyze base isolated structures with an elastic superstructure and inelastic/nonlinear isolation system. 3D-BASIS-TABS has three options for modeling the elastic superstructure: (1) three dimensional shear building representation; (2) full three dimensional representation; and (3) three dimensional building representation via a stiffness matrix supplied by user. The report describes the development and verification of the new program, which includes linear beam, column, shear wall and bracing elements to model the elastic three dimensional superstructure and inelastic/nonlinear elements to model the isolation system.
; Three dimensional display systems; Buildings; Earthquake engineering; Computer programs; Dynamic structural analysis