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Verification of a mathematical model for wood joist floor systems

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dc.contributor.authorGoodman, J. R., author
dc.contributor.authorCriswell, M. E., author
dc.contributor.authorBodig, J., author
dc.contributor.authorThompson, E. G., author
dc.contributor.authorVanderbilt, M. D., author
dc.contributor.authorLiu, Jeong-Schwu, author
dc.contributor.authorCivil Engineering Department, Colorado State University, publisher
dc.date.accessioned2017-05-26T19:43:31Z
dc.date.available2017-05-26T19:43:31Z
dc.date.issued1974-08
dc.descriptionCER74-75JSL-JRG-MEC-JB-EGT-MDV13.
dc.descriptionIncludes bibliographical references (pages 147-149).
dc.descriptionAugust 1974.
dc.description.abstractThe primary objective of this study is to develop verification for the validity of a mathematical model for the behavior of wood joist floor systems under working loads. This complex, multi-layered structural system consists of joists acting in incomplete composite and two-way behavior with one or more layers of sheathing. This physical system is simulated by a crossing-beam model consisting of a perpendicular set of T-beams and sheathing strips in developing the mathematical model. To allow the use of ordinary beam theory in evaluating the behavior of the T-beam elements, the effective flange width of the incomplete composite sheathing elements was required. An essential part of this study was the derivation and quantification of the effective flange width for a wide variety of parameters. Two solution techniques are presented for the mathematical model, a finite difference method and a more versatile finite element procedure. Methods are developed to evaluate the effect of gaps in the sheathing layers and the results of the effective flange width study are utilized in the theoretical solutions. A total of twenty-two full-scale floor tests are conducted as part of an experimental program to provide the necessary data for verification of the mathematical model. Generally excellent agreement was obtained between the computed and the measured results. An average algebraic error of +3.24 percent was obtained for the computed results as compared to the measured deflection for the twenty-two specimens studied. As indicated, the predicted values from application of the mathematical model are generally conservative. The verified mathematical model was used to evaluate extreme cases to assess individual effects of composite and two-way action of wood joist floors. In addition, parameter studies were conducted to isolate the effects of major variables. The verified model provides the basis for future development of improved design criteria for wood joist structural systems.
dc.format.mediumreports
dc.identifier.urihttp://hdl.handle.net/10217/180892
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991012265519703361
dc.relationTA7.C6 CER 74/75-13
dc.relation.ispartofCivil Engineering Reports
dc.relation.ispartofCER, 74/75-13
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subject.lcshFloors, Wooden -- Mathematical models
dc.titleVerification of a mathematical model for wood joist floor systems
dc.typeText
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