Distributed of Stresses and Partition of Loads in Gusseted Connections

Birkemoe, P.C.; Eubanks, R.A.; Munse, W.H.

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https://hdl.handle.net/2142/14271 Copy

Description

Title

Distributed of Stresses and Partition of Loads in Gusseted Connections

Author(s)

• Birkemoe, P.C.
• Eubanks, R.A.
• Munse, W.H.

Issue Date

1969-03

Keyword(s)

• Joints (Engineering) --Testing.
• Strains and stresses

Abstract

Load partition and stress distribution in riveted and bolted structural joints are two associated behavioral phenomena which have received continued attention from structural researchers and designers in an attempt to understand better the behavior of multiply fastened joints and to design them adequately. This study presents a basic analysis of various physical parameters and their effects on load partition and stress distribution in gussested connections. The gusseted connection under investigation is a particular type of riveted or bolted connection which has additional variables associated with the shape and size of the gusset plate. Analytical and experimental studies were conducted concurrently to justify the conclusions as well as study the assumptions made in arriving at the analytical models. Analytically, two elastic joint problems were studied: (1) the attachment of tension member by a single row of fasteners to a semi-infinite plate, (2) the similar attachment to a symmetrical tapered gusset plate. The parameters studied include the number of fasteners, the fastener pitch, the edge distance of fasteners, the fastener and tension member flexibilities, and thickness and geometry of the plate. The member to plate connections were evaluated in terms of the load partition among the fasteners as well as the stress distribution at various locations in the plate. It was found that, individually, many of the joint parameters did not appreciably affect the load partition in the connection; however, cumulatively they could have detrimental effects. One parameter, the edge distance severe stress conditions at the edge of plate on the line of loading. The finite geometry plate, studied experimentally, was fabricated and tested with variable geometry or taper of the gusset plate;the plate was loaded by lap plated connected by tight fitting pins. The elastic stress distribution was studied using brittle lacquer techniques and electrical resistance strain gages at specific locations on the gusset. Individual fastener loading was measured using a special technique involving the placement of strain gages on the gusset near the loaded pins. The load partition of the pinned joint was examined for five geometries and variable numbers of fasteners. Geometry did not appreciably affect the load partition until extreme geometries, which resulted in a change of the gusset net cross-sectional area, were reached.

Publisher

University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Civil Engineering Studies SRS-(343)

Type of Resource

text

Language

en

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http://hdl.handle.net/2142/14271

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