Date of Award

Spring 1995

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Civil Engineering

First Advisor

Faherty, Keith

Second Advisor

Heinrich, Stephen M.

Third Advisor

Wenzel, Thomas H.


The National Design Specification For Wood Construction (NDS) is based on an allowable stress philosophy in which stress adjustment factors, which are interrelated, are applied to tabulated stress values to ensure a safe design [1][2][3]. The 1991 NDS provided general interaction equations for biaxial loaded beam columns. The same interaction equations apply to both solid sawn dimension lumber and glued laminated timber. Allowable stress terms in the equations appear the same even though they are defined differently for solid sawn dimension lumber and glued laminated timber. It would seem beneficial to be able to define the interaction equation with functions which would act differently depending on the type of wood that is being evaluated (polymorphism). Object Oriented Programming provides a new level of abstraction that is able to model this type of problem. It is possible to write equations using functions that have not been defined. Each type of wood then inherits these equations and provides the specific definitions necessary to evaluate the equations. The purpose of this research is to provide a computer program to evaluate the general interaction equations, included in the 1991 National Design Specification/or Wood Construction, for biaxial bending in compression and tension, using Object Oriented Programming.



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