Methodology in ODSEWS-2D-II for Optimum Design of Structures to Seismic and Wind Forces

by D. S. Juang, Univ of Missouri-Rolla, United States,
Franklin Y. Cheng, Univ of Missouri-Rolla, United States,

Document Type: Proceeding Paper

Part of: Computer Utilization in Structural Engineering


This paper presents the theoretical derivations and numerical procedures used in the computer program called ODSEWS-2D-II for the analysis and optimum design of 2-dimensional regular and irregular steel frames subjected to static, earthquake, and wind forces. The seismic input can be interacting ground motions of actual earthquake records, various response spectra, and different building provisions of UBC, and ATC-03 in the U.S. and TJ-11 in China. Included in the paper are the mathematical formulation based on the consistent mass and the displacement method with consideration of geometric nonlinearity, three levels of recursive optimization procedures, the objective function of minimum construction and damage costs, and the constraints of stresses, displacements, frequencies as well as the upper and lower bounds of the design variables. Several design examples are provided to show the efficiency of the proposed algorithms, the versatility of the computer program, and the effect of the various code requirements.

Subject Headings: Seismic design | Seismic tests | Wind forces | Steel structures | Ground motion | Construction methods | Earthquake resistant structures | Load and resistance factor design | China | Asia

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