RESEARCH ARTICLE
Temperature Effects and Calculation Method of Closure Temperatures for Concrete-filled Steel Tube Arch Rib of Dumbbell-shape Section
Bin Yang*, 1, 2, 3, Jinhua Huang*, 1, 2, 3, Chunjiao Lin*, 1, 2, 3, Xinkun Wen*, 1, 2, 3
Article Information
Identifiers and Pagination:
Year: 2011Volume: 5
First Page: 179
Last Page: 189
Publisher ID: TOCIEJ-5-179
DOI: 10.2174/1874149501105010179
Article History:
Received Date: 23/11/2010Revision Received Date: 19/8/2011
Acceptance Date: 15/9/2011
Electronic publication date: 16/12/2011
Collection year: 2011
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
This paper has done continuous on-site experimental researches on temperature field and temperature effects that are under the influence of hydration heat of concrete during the molding process of dumb-bell CFST arch bridge. Analysis on time-history law of temperature field and temperature effects is made. Results reveal that temperature variation of hydration heat of the concrete within the steel tube is showed as follows: temperature rising-continuous high temperature—temperature dropping—equalizing. The structural temperature field, generated under the effect of hydration- heat in the process of molding arch rib, is nonlinear temperature field. Temperature field of concrete hydration heat has an obvious effect on crown section. Finally, practical methods to calculate the closure temperature of CFST arch rib and the effective measures to reduce the residual internal stress of temperature of arch rib are proposed.
