温度回升对坝体运行后期工作性态的影响研究OACSTPCD

Temperature recovery has been one of research focuses during the construction and operation of dam.Based on Zhouning RCC gravity dam,the combined function model of hydration heat rise of concrete with high fly ash dosage proposed by Zhang Guoxin and others are used to analyze and predict the temperature rise of the dam in the later stage through simulation modeling and linear calculation,and explore its influence on the deformation and stress of the dam.The simulation prediction results show that,(a)the temperature rise will reach the peak after 4-5 years of dam construction,the temperature rise will have little impact on the deformation of the dam body,and the deformation will gradually disappear after the temperature rises to stability;and(b)the effect on stress is generally favorable,and excessive tensile stresses can occur in local areas.Temperature rise is a long-term process,and the impact of temperature rise needs to be fully considered in the safety assessment of the working state during the operation of dam.This study predictively analyzes the impact of temperature rise on the working behavior of dam in the later stage of operation,which provides reference value for the temperature rise study of other engineering.