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现阶段有关大跨度钢筋混凝土箱型截面梁桥预应力损失的研究很多,但结合实际量测的预应力损失来研究其损失的一般规律较少,基于此本文以40+80+40m的高速铁路桥梁为研究对象,首先利用预埋锚索测力计的方法对预应力损失进行实测,在利用Midas/Civil软件建立相应的实桥模型,并对预应力损失和成桥状态进行分析,最后对实际值与理论值进行对比分析,以得出预应力损失的大概规律,为以后的相关工程的修建提供一定的参考价值。
At present, there are many researches on the prestress loss of long-span RC box-type beam bridges. However, the general law of loss due to the loss of prestressed concrete measurement is relatively few. Based on this study, 40 + 80 + 40m high-speed railway Bridge as the research object, firstly, the prestress loss was measured by the method of embedded anchor cable dynamometer, then the corresponding real bridge model was established by using Midas / Civil software, and the prestress loss and bridge forming condition were analyzed. Finally, The actual value and the theoretical value are compared and analyzed to get the approximate rule of the prestress loss and provide some reference value for the construction of related projects in the future.