Scholarly Communications Project


<ETD> Submission Form - Cataloger

Name:
Philip J. O'Regan

Email address:
poregan@vt.edu

Title:
Combined Tension and Bending Loading in Bottom Chord
Splice Joints of Metal-Plate-Connected Wood Trusses

Date of defense:
May 1, 1997

Document Type:
Master's Thesis

Degree:
Master of Science

Department:
Biological Systems Engineering


Abstract


Metal-plate-connected (MPC) splice joints were tested in combined tension and bending to generate data that were used in the development of a design procedure for determining the steel net-section strength of bottom chord splice joints of MPC wood trusses. Several common wood truss splice joint configurations were tested at varying levels of combined tension and bending loading. The joint configurations were 2x4 lumber with 20-gauge truss plates, 2x6 lumber with 20-gauge truss plates, and 2x6 lumber with 16-gauge truss plates. All the joints tested failed in the steel net-section of the truss plates. The combined loading was achieved by applying an eccentric axial tension load to the ends of each splice joint specimen.

Three structural models were developed to predict the ultimate strength of the steel net-section of the splice joints tested under combined tension and bending loading. The test data were fitted to each model, and the most accurate model was selected. Data from other published tests of splice joints were used to validate the accuracy of the selected model. A design procedure for determining the allowable design strength of the steel net-section of a splice joint subjected to combined tension and bending was developed based on the selected model. The new design procedure was compared with two existing design methods. The proposed design procedure is recommended for checking the safe capacity of the steel net-section of bottom chord splice joints of MPC wood trusses subjected to combined tension and bending.

Keywords:
wood truss, combined loading, truss plate splice joints, truss design

Availability:
In 3 months.

Public URL:
http://scholar.lib.vt.edu/theses/public/etd-139151049761291/etd-title.html


List of attached files

File NameSize (Bytes)
ETD.PDF1,343,240 Bytes


Date item approved:
05/13/97

Fees:
Archiving fee received.



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