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One-sided Steel Shear Connections in Column Removal Scenario
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- Author / Creator
- Daneshvar, Hossein
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There are many design methodologies and philosophies intended to provide structural
integrity or increase structural robustness, thereby making structures resistant to
progressive collapse. However, there is little information that reveals sources and
levels of inherent robustness in structural steel members and systems. The present
study seeks to begin the process of behaviour evaluation of components and
assemblages initially designed for other purposes than progressive collapse, such as
gravity loads, and make recommendations regarding their performance and possible
methods for improvements for the new scenario. These recommendations can lead to
more economical design and safer structural steel systems in the event of localised
damage that has the potential to spread to a disproportionately large part of the
structure.
Connections play a major role in ensuring general integrity of different types of steel
structural systems. Hence, numerical investigations have been performed to extend
the current body of knowledge on connections and, consequently, the structural
response in the event of progressive collapse. This study is intended to examine the
response of steel frames with simple shear connections in the aftermath of unusual
and extreme localized loads. The main goal of this research is to evaluate the
behaviour of some prevalent and economical one-sided (i.e., connected only on one
side of the supported beam web) shear connection types—shear tab, tee (WT), and
single angle—in buildings, and perform numerical analyses on those connection
configurations under extreme loading scenarios represented generically by the socalled
“column removal scenario”. Characteristic features of the connection response,
such as the potential to develop a reliable alternative path load through catenary
action and ultimate rotational capacities, are discussed to provide a solid foundation
for assessing the performance of buildings with these types of connections.
Observations regarding the analysis results are synthesized and conclusions are drawn
with respect to the demands placed on the connections. The results of this research
project should contribute to a better understanding of the resistance of steel structures
with one-sided shear connections to progressive collapse. -
- Graduation date
- Fall 2013
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- Type of Item
- Thesis
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- Degree
- Doctor of Philosophy
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- License
- This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.