蒸汽养护条件下混凝土节段梁水化热仿真计算  

Simulation Calculation of Hydration Heat of Concrete Segmental Beams Under Steam Curing Conditions

作　　者：尤琦 陈飞翔[1] 明鑫 张国志 刘可心 YOU Qi;CHEN Feixiang;MING Xin;ZHANG Guozhi;LIU Kexin(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei430040,China;CCCC Highway Bridge National Engineering Research Centre Co.,Ltd.,Wuhan,Hubei430040,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]中交公路长大桥建设国家工程研究中心有限公司,湖北武汉430040

出　　处：《施工技术（中英文）》2023年第10期41-45,共5页Construction Technology

基　　金：山东省重点研发计划:海上施工作业技术与装备研发(2021ZLGX04)。

摘　　要：以常泰长江大桥北引桥首件预制节段梁为研究对象,通过仿真计算分析预制节段梁在蒸汽养护过程中的温度和应力场分布,验证设计的蒸汽养护制度的可行性,并与测点温度进行对比。结果表明:温度计算值与测点实测值的大小及发展规律基本一致,蒸养过程中节段梁总体上应力值未超过0.01MPa,抗裂安全系数远大于1.4,因此判断不会发生温度应力裂缝,与现场节段梁表面未发现裂纹的实际结果一致。The first prefabricated segmental beam of Changtai Yangtze River Bridge North Approach Bridge was taken as the research object,and the temperature and stress field distribution of the prefabricated segmental beam during the steam curing process were analyzed by simulation calculation to verify the feasibility of the designed steam curing system,and compared with the measured point temperature.The results show that the magnitude and development pattern of the calculated temperature values and the measured values at the measurement points are basically consistent,and the overall stress value of the segmental beams during the steam curing process does not exceed 0.01MPa,and the crack resistance safety factor is much higher than 1.4,so it is judged that no temperature stress cracks will occur,which is consistent with the actual results that no cracks are found on the surface of the segmental beams at the site.

关 键 词：混凝土 预制节段梁 蒸汽养护 水化热 温度应力场 仿真计算 

分 类 号：TU755[建筑科学—建筑技术科学]