NEHRP Clearinghouse
- Title
- OPTNSR-An Interactive Software System for Optimal Design of Statically and Dynamically Loaded Structures with Nonlinear Response.
- File
- PB81218851.pdf
- Author(s)
- Bhatti, M. A.; Ciampi, V.; Pister, K. S.; Polak, E.
- Source
- National Science Foundation, Washington, DC., January 1981, 187 p.
- Identifying Number(s)
- UCB/EERC-81/02
- Abstract
- This report describes a software system for optimization-based, interactive computer-aided design of statically and dynamically loaded structures with nonlinear response. The system combines two programs, INTEROPTDYN and MINI-ANSR. The program INTEROPTDYN is based on a feasible directions algorithm for solving a constrained optimization problem, where both non-parametric and parametric (time-dependent) constraints are allowed. Program MINI-ANSR is a modification of an existing general purpose structural analysis program, ANSR-1. Details of these programs are described, together with an interfacing package connecting the analysis and optimization phases of the design process. The following features are available to the user: Stop and restart capability as well as user-supplied changes in both design variables as well as parameters in the optimization algorithm. Graphical display of key information is available at all stages of the design process. Two example problems - one an elastic, statically loaded truss and the second an impulsively loaded nonlinear braced frame - are included to illustrate use of the system.
- Keywords
- Structures; Earthquake resistant structures; Computerized simulation; Algorithms; MINI-ANSR computer program; NTISNSFRA; Structural design; Dynamic response; Finite element analysis; Earthquake engineering; Computer programs; Computer aided design; INTEROPTDYN computer program; Earthquakes; Dynamic structural analysis