TECHNICAL PAPERS
Nov 1, 1999
Compound Size Effect in Composite Beams with Softening Connectors. II: Differential Equations and Behavior
Authors: Zdeněk P. Bažant and Jan L. VítekAuthor Affiliations
Publication: Journal of Engineering Mechanics
Volume 125, Issue 11
Abstract
After presenting an energy analysis of size effect in the first part of this study, the second part gives a solution by integrating the differential equations of beam bending theory, coupled with a softening force-slip law for the interface. This analysis is more accurate than the previous energy analysis but does not yield simple explicit formulas for the size effect. The results generally support the simple conclusion from energy analysis. They do not disagree with the available limited experimental evidence; however, measurements of size effect in geometrically scaled composite beams seem unavailable. Further tests are needed.
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References
1.
Bažant, Z. P. (1984). “Size effect in blunt fracture: Concrete, rock, metal.”J. Engrg. Mech., ASCE, 110(4), 518–535.
2.
Bažant, Z. P., and Vítek, J. L. (1999). “Compound size effect in composite beams with softening connectors. I: Energy approach.”J. Engrg. Mech., ASCE, 125(11), 1308–1314.
3.
Wright, H. D., and Francis, R. W. (1990). “Tests on composite beams with low levels of shear connection.” The Struct. Engr., London, 68(15/7), 293–298.
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History
Received: May 11, 1999
Published online: Nov 1, 1999
Published in print: Nov 1999
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Zdeněk P. Bažant
Jan L. Vítek
Fellow, ASCE
Walter P. Murphy Prof. of Civ. Engrg. and Mat. Sci., Northwestern Univ., Evanston, IL 60208. E-mail: [email protected]
Assoc. Prof., Czech Tech. Univ. (ČVUT), Prague, 16229 Czech Republic.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.