Journal of Materials and Engineering Structures
Volume 9, Numéro 4, Pages 427-434
2022-12-30
Effect Of Creep And Shrinkage Model In Calculation Of Long-term Deflection Of Three-span Solid Slab Continuous Prestressed Concrete Bridge
Authors : Nguyen Xuan Tung . Ngo Van Minh . Nguyen Ngoc Long . Dung Pham Tuan .
Abstract
Shrinkage and creep effect significantly to the long-term deflection of prestressed concrete bridge. The proper shrinkage and creep models should be developed to meet the requirements of deflection effect calculation. There are many models have been researched and developed. Each specification, such as ASSHTO, Eurocode, ACI and CEB-FIB, has their own model of shrinkage and creep by considering different input parameters. The long-term deflection calculation is also different in each specification as a result. In this paper, several shrinkage and creep models were selected and reviewed to see the differences and compare by using popular concrete grade in Vietnamese bridge construction (C40 and C45, equivalent to 40 and 45 Mpa, respectively). Those selected shrinkage and creep models are applied in calculation of deflection for a typical three-span continuous solid slab prestressed concrete bridge. The calculation results show the significant different of long-term deflection and the ASSHTO shrinkage and creep model show the biggest deflection.
Keywords
Shrinkage ; Creep ; Deflection ; Prestressed concrete bridge
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