Evaluation of Progressive Collapse in Steel Structures Designed Based on Iranian Code of Practice for Seismic Resistant Design Buildings (Standard No. 2800), 4th Edition and Iranian National Building Code (INBC), Part 10

Abstract

This research takes a look at the gradual collapse of steel buildings with dual systems of moment resistant and
braced frames on four, eight, and ten stories high. Errors in design or construction, fires, gas explosions, inadvertent
overloading, vehicle accidents, bomb blasts, and other extreme events can all cause structures to gradually collapse.
The dynamic study of these events appears important due to the action of these factors during a brief time period.
The loss of a loved one unexpectedly is used to examine the impact of the aforementioned situations. Part 6 and Part
10 of the Iranian National Building Code, as well as the Iranian Code of Practice for Seismic Resistant Design
Buildings (Standard No. 2800), Fourth Edition, were used to create the structures in the study. Abaqus finite
element software is used to model the structural frames and evaluate the forces and displacements experienced by
the members. Subsequently, the loads and their application to the structure, components of the analysis process
model (APM), and the unexpected loss of members are used to establish the dynamic response of the structure.
Analyses of the braced frames analyzed indicate that the loss of a center column is more detrimental than the loss of
a corner column. To rephrase, the corner columns of a perimeter frame are more secure than the center ones.Key words:
Progressive collapse, steel structures, Iranian Code of Practice for Seismic Resistant Design Buildings (Standard No. 2800), progressive failure, Abaqus.