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为考察JTG D62-2004混凝土收缩徐变模型在预应力混凝土连续刚构上的适用性,以芝来沟大跨预应力混凝土连续刚构桥为工程背景,采用现场实测和理论模型对比的方法,对比分析了桥墩、主梁底板、主梁顶板的收缩徐变。结果表明,JTG D62-2004模型可以很好的对桥墩、主梁底板的收缩徐变进行预测,而对主梁顶板来说则需要乘1.8倍的修正系数。该结论可供设计、施工监控等部门参考。
In order to investigate the applicability of JTG D62-2004 concrete shrinkage and creep model on prestressed concrete continuous rigid frame, taking Zhilaigou large span prestressed concrete continuous rigid frame bridge as the engineering background, by field comparison and theoretical model comparison, Contrastively analyzed the shrinkage and creep of bridge pier, main girder soleplate and main girder roof. The results show that the JTG D62-2004 model can predict the shrinkage and creep of piers and girders’ bottom slabs well, while it takes 1.8 times the correction factor for the girder roof. The conclusion for design, construction monitoring and other departments for reference.