一、前 言 温度荷载常常被作为特殊荷载来考虑.但是,混凝土开裂的主要原因却往往是由于过大的温度应力所造成.因此,温度应力的研究已成为水工结构应力与稳定分析的重要课题之一. 水工混凝土结构中温度应力的计算十分复杂.因此,常借助于实验手段来确定结构的温度应力分布. 在高温电阻应变片法、云纹法或热光弹性法等各种实验方法中,热光弹性法具有较 I. INTRODUCTION Temperature load is often considered as a special load, however, the main reason for concrete cracking is often caused by excessive temperature stress. Therefore, the study of temperature stress has become an important issue in the stress and stability analysis of hydraulic structures The calculation of temperature stress in hydraulic concrete structure is very complicated.Therefore, often by means of experiment to determine the temperature stress distribution of the structure.In high temperature resistance strain gage method, moire method or thermal photoelastic method and other experimental methods In the thermal photoelastic method has more