桥梁大体积混凝土浇筑过程的温度场及温度应力

Study on temperature field and stress and the influence of massive concrete in bridge

桥梁大体积混凝土质量控制的一个重要方面是温度控制,本文通过对宁波甬江特大桥承台大体积混凝土在施工过程中的温度场与温度应力进行仿真分析,计算了大体积混凝土内部温度场及仿真应力场,从而采取了相应温控措施,并对分析计算结果与实测结果进行对比分析,表明该温控措施有效地控制了混凝土的最高温升和内外温差,对类似工程具有一定的借鉴作用.

The temperature control is the important aspect of quality control for massive concrete in bridge. The paper made simulation analysis and calculates the massive concrete temperature fields and temperature stress in the construction process of cap to Ningbo Yongjiang bridge, had adopted the corresponding temperature control measures, and compared the calculation results with measuring result. Result indicates that the adopted measures had controlled effectively the most intreasing temperature and the difference between inside and outside temperatures, which were of certain guidance to the construction of similar concrete works.