收缩对分期浇筑砼箱梁受力性能的影响分析
首发时间:2019-10-18
摘要:本文针对实际工程中分层浇筑的预应力钢筋砼箱梁,考虑箱梁上下层收缩不同步,可能对混凝土箱梁受力性能产生影响。主要通过有限元方法研究收缩对分期浇筑混凝土箱梁受力性能的影响,研究表明分期浇筑对箱梁受力性能的影响较大,时间间隔越长对箱梁受力性能的影响也越大,龄期越长对未加载箱梁受力性能的影响也越大。
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Analysis of Influence of Shrinkage on Mechanical Behavior of Layered Pouring Concrete Box Girder
Abstract:In this paper, for the prestressed reinforced concrete box girder with layered pouring in actual engineering, considering the shrinkage of the upper and lower layers of the box girder are not synchronized, it may affect the mechanical behavior of the concrete box girder. The influence of shrinkage on the mechanical behavior of layered pouring concrete box girder is mainly studied by finite element method. The research shows that the layered pouring has a great influence on the mechanical behavior of box girder. The longer the time interval, the greater the influence on the mechanical behavior of box girder. The longer the age, the greater the impact on the unloaded box girder.
Keywords: layered pouring shrinkage box girder mechanical behavior
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