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Load Duration and System Effects in LRFD for Wood Construction

by David V. Rosowsky, Purdue Univ, W Lafayette, United States,
Bruce R. Ellingwood, Purdue Univ, W Lafayette, United States,



Document Type: Proceeding Paper

Part of: Probabilistic Mechanics and Structural and Geotechnical Reliability

Abstract:

The wood industry is developing a Load and Resistance Factor Design (LRFD) speciification for wood construction using probabilistic concepts. An analysis based on statistical models for both the time-dependent structural loads and the material strengths is performed to develop new time effect and system factor for use in an LRFD code. This analysis reflects both the time-dependent strength of wood and the inherent load sharing capabilities of wood systems. Damage models developed from tests of full-size dimension lumber specimens are used in perfoming time-dependent reliability analysis of members and systems to reflect the limit state associated with progressively accumulated damage.

Subject Headings: Load and resistance factor design | Wood construction | Load duration | Wood and wood products | Wood structures | Structural analysis | Time dependence

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