Analysis on Stress State of Box-Girder Web under Prestressing

Abstract:

In order to study the stress of box-girder web under prestressing, and confirming the internal stress distribution of the web, analyzing of vertical prestressed box girder, curved beam prestressed sensitivity under the webs. Establishing finite element model of the box-girder webs vertical prestressing effect is analyzed, results show that the principal tensile stress of the web is sensitive to the vertical prestress, applying the vertical prestress can effectively reduce the principal tensile stress of the web; with the decrease of the effective vertical prestress, the neutral axis above the principal compressive stress decreases rapidly, while below the neutral axis decreases relatively slow; Under the same vertical preloading stress level, the roots of cross section of the compressive stress of web reserves than L/4 section of the web.

• Periodical: Applied Mechanics and Materials (Volumes 602-605)
• Pages: 33-36
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.602-605.33
• Online since: August 2014
• Authors: Bao Jun Zhao*, Guo Rui Zhu, Liang Yin
• Keywords: Box Girder, Prestressing Effect, Stress State, Web

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