Document Type

Thesis - University Access Only

Award Date

2006

Degree Name

Master of Science (MS)

Department / School

Civil and Environmental Engineering

Abstract

Research was conducted to determine the strength and stiffness of wood-framed metal-clad diaphragms for Energy Panel Structures. These tests were conducted on diaphragm sections constructed to simulate roof sections. The roof sections were constructed in two different arrangements, cantilever and simple beam. In all, there were 29 diaphragms tested, 15 cantilever and 14 simple beam. For each series, a different fastener pattern was used along with different amounts of shear blocking. Screws were used to fasten the sheeting to the purlins and the purlins were connected to the rafters using nails. The cantilever diaphragms were each tested twice, with the first being bending moment failure and the second being shear failure. The simple beam diaphragms were only tested once for shear failure. Shear blocking increased the strength of the cantilever diaphragms by 15% and stiffness by 35%. Seam fasteners, used in the cantilever diaphragms, increased the strength by 30% and stiffness by 18%. Seam fasteners did not affect the strength or stiffness of the simple beam diaphragms, due to the mode of failure. When the purlin spacing was increased, from 24 inches to 30 inches, it decreased the strength of the cantilever diaphragms by 20% and the stiffness by 30%.

Library of Congress Subject Headings

Diaphragms (Structural engineering) -- Design and construction

Diaphragms (Structural engineering) -- Testing

Roofs -- Design and construction

Metal cladding

Format

application/pdf

Number of Pages

223

Publisher

South Dakota State University

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