Practical advanced analysis in seismic design of steel building frames
Abstract
This thesis presents the usage of advanced analysis in seismic design of steel building frames. First, practical design procedures consistent with LRFD seismic design has been developed. Then, the advanced analysis is used to assess the major impacts due to the 1997 LRFD seismic code revisions. The general format of LRFD static seismic design procedure, utilizing advanced analysis, has been developed. Following the format, the design procedure has been modified to accommodate different framing systems and produce similar LRFD designs. Advanced analysis directly addresses the overall system response, including second order effects P-δ, P-Δ, gradual yielding, inelastic force redistribution, and semirigid connections. Since advanced analysis eliminates tedious member capacity checks (K factor), the advanced analysis has been used to systematically evaluate the revised 1997 LRFD seismic provision. Overall, the advanced analysis provides a good match with LRFD design and provides the system behavior of the design. Not only is it more efficient, but it can identify the critical areas. The proposed advanced analysis procedure can easily be adapted to newly developed system, because the general procedures remain the same, only the specific procedures need to be modified. Also, the small program size, short run time, and simple input format (including geometry, member properties, and loadings) make the application of advanced analysis easy and practical. Therefore, the proposed method may be a good alternative design procedure for static seismic design.
Degree
Ph.D.
Advisors
Chen, Purdue University.
Subject Area
Civil engineering
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