Long-Term Behavior of Timber–Concrete Composite Beams. I: Finite Element Modeling and Validation
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Volume 132, Issue 1
Abstract
This first part of two companion papers deals with the numerical modeling of timber–concrete composite beams (TCCs) under long-term loading. All phenomena affecting the long-term behavior of timber, concrete, and the connection system, such as creep, mechanosorptive creep, shrinkage/swelling, and temperature variations, are fully considered. The structural problem is solved through a uniaxial finite element model with flexible connection and a step-by-step numerical procedure over time. The important role played by the environmental thermohygrometric variations on TCCs is highlighted through some analyses. The proposed numerical procedure is validated on two long-term experimental tests in outdoor conditions. Despite some uncertainties in environmental conditions and material properties, a good fit between experimental and numerical results is obtained. A parametric analysis is performed in the second part, showing the contribution of different rheological phenomena and thermohygrometric variations on beam deflection and connection slip. Based on results carried out, a simplified approach for long-term evaluation of TCCs is then proposed.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 132 • Issue 1 • January 2006
Pages: 13 - 22
Copyright
© 2006 ASCE.
History
Received: Jul 8, 2003
Accepted: May 16, 2005
Published online: Jan 1, 2006
Published in print: Jan 2006
Notes
Note. Associate Editor: Enrico Spacone
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