Date of Award

Spring 1-1-2012

Document Type

Thesis

Degree Name

Master of Science (MS)

First Advisor

George Hearn

Second Advisor

Abbie B. Liel

Third Advisor

Mettupalayam V. Sivaselvan

Abstract

In steel construction, it is not uncommon to encounter a bolted connection that supports an eccentric load. Determining the capacity of the bolted connection is dependent on the location and attitude of the applied eccentric load. There have been numerous proposed design methods for determining this capacity. These include the elastic method, the modified elastic method, the plastic method and the instantaneous center method. The instantaneous center method is the preferred method in the current AISC Steel Construction Manual (13th Edition) to design a bolt group under eccentric loads. This method, however, is complicated for design engineers since it requires an iterative analysis. Design engineers are then left with the option of laying out the bolt group to match one of the pre-populated design tables or performing a simplified and conservative elastic analysis. Neither option is particular appealing given that it is not always possible to match the design tables and design engineers are expected to provide competitive and efficient designs. The software developed in this thesis allows design engineers to quickly obtain the capacity of any bolt group using the instantaneous center method. This removes the limitations on design engineers and allows them to provide the best possible connections. The software also provides the capacity of a given bolt group using both the elastic and plastic method, in order to not limit design engineers to one particular method. While the instantaneous center method is preferred, by providing the results for all methods, the design engineer is given complete freedom to use the software in a way that works best for them.

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