TECHNICAL PAPERS
Dec 1, 1986
Foamed Plastic Absorbs Staged Post‐Tensioning Deflections
Authors: James Tyvand, A. M. ASCE, and Arthur T. BlachlyAuthor Affiliations
Publication: Journal of Construction Engineering and Management
Volume 112, Issue 4
Abstract
Staged construction of a long, post‐tensioned, concrete highway bridge faces a falsework designer with the alternatives of a costly overdesign of falsework bents for all but a one‐time, short‐term load or the provision for expensive lowering devices. The problem is solved by using crushable foamed plastic support blocks. The support blocks can be designed to safely support the dead load of the superstructure and to crush when post‐tensioning increases the reaction, thus limiting the reaction. While crushing, the blocks continue to provide the necessary support for the superstructure. Stress and strain graphs for foamed isocyanurate are provided, which demonstrate its suitability for this application and provide the basis for design.
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Copyright © 1986 ASCE.
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Published online: Dec 1, 1986
Published in print: Dec 1986
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James Tyvand, A. M. ASCE
Civ. Engr., F. E. Ward, Inc., 2710 N.E. 78th St., Vancouver, WA 98665
Arthur T. Blachly
Sr. Struct. Designer, Bridge Design Section, Oregon Dept. of Transportation, Salem, OR 97310
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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.
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.