Performance Prediction and Evaluation of Steel Special Moment Frames for Seismic Loads

Several classes of post-Northridge buildings, which are representative of typical buildings designed by the 1997 NEHRP provisions and constructed using pre-qualified ductile connections, were developed considering different heights, locations, and soil types. Then, the frame analysis models were made including the effect of post-Northridge ductile connection, panel zone deformation and interior gravity frames. The 1973 UBC, 1985 UBC and 1994 UBC provisions were selected for the pre-Northridge 3-, 9- and 20-story buildings in Los Angeles and Seattle and designed for wind and seismic loads. A total of 15 pre-Northridge buildings, which are representative of typical buildings based on year of construction and brittle pre-Northridge connections, were designed considering different height, locations and year of construction. Then, the frame analysis models were made including the effect of post- and pre-Northridge connection, panel zone deformation and interior gravity frames. The seismic demands and capacities were calculated using each set of 20 SAC ground motions representing 2/50 and 50/50 hazard levels. Using the drift demands and capacities, the performance prediction and evaluation procedure based on the reliability framework for SMRF buildings is presented. The randomness and uncertainty associated with predicting the capacity and demand are explicitly accounted for this method. Confidence levels that existing buildings will exceed the pre-defined performance level against different hazard levels are calculated based on the Collapse Prevention (CP) and Immediate Occupancy (IO) performance levels.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Lee, Kihak

Contributors dc:contributor

• Foutch, Douglas A.

• Engineering, Civil

Language dc:language

eng

Identifier

(MiAaPQ)AAI9990056

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83521