预应力混凝土箱梁水化热温度及应变的试验研究

Experimental Research on Thermal Strain under Hydration Heating of Pre-stress Concrete Box Beam

本文通过对秦沈客运专线32m箱型梁的水化热温度和温度应变观测数据的统计与分析,研究箱梁水化热阶段的温度尤其是温度应变的变化规律。为研究水化热阶段的温差应力及相应的早期裂缝控制提供参考依据。

This paper is to search and try to find out temperature fluctuation pattern and, especially the thermal strain of the box beam under hydration heating by statistical analysis of the real time observed data about the temperature and the strain of the 38^(th) span of box beam of Liuguhe River bnidge of the Qinshen railway, for the purpose to offer the reference to search the thermal strain and initial cracking on the stage of hydration heat.