Influence of lumber property correlations on roof truss reliability

Simple item page
dc.contributor.authorHamon, David Corbinen
dc.contributor.committeechairWoeste, F. E.en
dc.contributor.committeememberRojiani, K. B.en
dc.contributor.committeememberCundiff, J. S.en
dc.contributor.departmentAgricultural Engineeringen
dc.date.accessioned2023-01-27T04:47:46Zen
dc.date.available2023-01-27T04:47:46Zen
dc.date.issued1983en
dc.description.abstractThis study utilizes state of the art information concerning roof truss behavior to simulate the effect of strength property correlations on roof truss reliability. Also, research efforts to define lumber property correlations are summarized. Computer models were constructed to simulate the behavior of five common roof truss patterns. The patterns studied were the Fink, double W, triple W, triple W farm, and flat Howe trusses. Monte Carlo simulation, based on 50,000 trials, was used to calculate probabilities of failure for each truss pattern, and level of strength property correlation. The simulated trusses were subjected to a 50 year maximum lifetime snow load distribution plus a dead load distribution. Bending, tensile, and compressive strength properties were modeled by a weighted least squares regression analysis. Modulus of elasticity was used as the independent strength predictor, and was modeled by a Weibull distribution. The residual strength correlations in the regression models were varied between simulations from 0.0 to 0.9. Member stresses were calculated using a pin joint analysis modified by load factors derived from the Purdue Plane Structures Analyzer. Truss failure was determined by a weakest link analysis which used failure criterion developed from current truss design equations. The influence of lumber property residual correlations on roof truss reliability was defined. The probability of failure increased as the levels of correlation increased, but the difference in magnitudes were considered insignificant. Also, the ratio of snow to dead load was found to be affect wood truss reliability.en
dc.description.degreeM. S.en
dc.format.extentviii, 91 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/113487en
dc.language.isoenen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 10381552en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1983.H356en
dc.subject.lcshLumber -- Testing -- Mathematical modelsen
dc.subject.lcshRoof trusses -- Testing -- Mathematical modelsen
dc.titleInfluence of lumber property correlations on roof truss reliabilityen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineAgricultural Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V855_1983.H356.pdf
Size:
3.6 MB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses