Performance of Connections with Bolts and Welds in Combination 

Abstract

This project focuses on investigating the behavior of steel connections with bolts and welds sharing the load. This combination method occurs commonly in changing designs and retrofit of existing structures. However, previous literature only considered little parameters on small axial lap connections which shows a poor understanding of this method. Accordingly, several critical variables will be included in this project, like bolt type, load eccentricity, connection size, which have influences on the capacity of connections with bolts and welds sharing loads.
 
In this project, more than 100 specimens will be tested to help characterize the effect of these critical variables. Finite element modeling and analysis will be complemented at the same time to help more fulling understand the behavior of combination joints under varying conditions. Additionally, probabilistic analysis and stochastic modeling will be performed to quantify the uncertainties associated with the performance of this type of connections.
 
From this work, we expect to significantly increase the body of knowledge in understanding the mechanics and behavior of connections made with combination of bolts and welds. Furthermore, we expect to drive recommendations in both specifications and standard practice where the industry can be confident of safe and reliable connections, with a good understanding of predicted capacities.

In this project, more than 100 specimens will be tested to help characterize the effect of these critical variables. Finite element modeling and analysis will be complemented at the same time to help more fulling understand the behavior of combination joints under varying conditions. Additionally, probabilistic analysis and stochastic modeling will be performed to quantify the uncertainties associated with the performance of this type of connections.

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Testing Configuration

Plan View

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Bolt Configuration