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对结构影响较大的是混凝土结构内的最高温度、内外温差及降温速率。通过对高墩大跨连续刚构桥梁混凝土浇筑养护期间的温度实测及应力分析得知,结构内的最高温度是由初始浇筑温度与水化热温升共同决定的,而初始浇筑温度又是水化热反应的起始温度;内外温差包括结构中心与表面的温差及结构与外界环境的温差;降温包括结构自身因放热量小于散热量出现的内部自然降温或人工冷却降温和因拆模或养护不当遭受外界寒潮引起的表面温度骤降。
Greater impact on the structure of the concrete structure is the highest temperature, temperature difference between inside and outside and cooling rate. Through the temperature measurement and stress analysis during concrete pouring and curing of continuous rigid frame bridge with high pier and long span, it is found that the maximum temperature in the structure is determined by the initial pouring temperature and the temperature rise of hydration heat, and the initial pouring temperature is water The initial temperature of the thermal reaction; internal and external temperature differences, including the structure of the center and the surface temperature difference and the structure and the external environment temperature difference; cooling, including the structure itself due to heat less than the amount of internal cooling natural cooling or artificial cooling and demolition due to mold or conservation Improper exposure to external cold caused by surface temperature plunge.