Time-History Analysis of Pre-Stress Loss of Four-Spans Pre-Stressed Continuous Rigid Frame Bridge

Abstract:

Taking Guizhou Hezhang Bridge as the engineering background, this paper used Midas/Civil FEM platform to study the pre-stress loss and deformation of main girder in bridge construction stage and completion stage on the basis of concrete creep and shrinkage formulas provided by “Highway reinforced concrete and pre-stressed concrete bridge design code (JTG D62-2004)” and the US bridge standard – AASHTO LRFD – published in 2005. The results showed that the pre-stress pipeline friction losses calculated according to the two standards are basically the same. The loss of the anchor deformation, elastic compression and tendon relaxation obtained by AASHTO LRFD is slightly greater than that obtained by JTG D62-2004. However, due to the different computing models, both pre-stress loss and the main beam deflection caused by concrete creep and shrinkage obtained by AASHTO LRFD are larger than that by JTG D60-2004.

• Periodical: Applied Mechanics and Materials (Volumes 587-589)
• Pages: 1462-1467
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.587-589.1462
• Online since: July 2014
• Authors: Jin Yu Liu*, Yang Zou, Peng Peng Zheng
• Keywords: Continuous Rigid Frame Bridge, Deformation, Pre-Stress Loss, Time-History Analysis

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