巨型钢管高强混凝土柱水化热温度场分析  

Study on Hydration Temperature Field of Super-large High-strength Concrete Filled Steel Tube Column

作　　者：王强[1] 刘蕴文 陈宇 闫玉翟 包书春 WANG Qiang;LIU Yunwen;CHEN Yu;YAN Yudi;BAO Shuchun(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;North CMA Technology Co.Ltd.,Shenyang,China,110042;China State Construction Railway Investment&Engineering Group Co.Ltd.,Beijing,China,102600;China Construction Third Engineering Bureau Group Co.Ltd.,Wuhan,China,430000)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]北方测盟科技有限公司,辽宁沈阳110042 [3]中建铁路投资建设集团有限公司,北京102600 [4]中建三局集团有限公司,湖北武汉430000

出　　处：《沈阳建筑大学学报（自然科学版）》2023年第6期1033-1041,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52027811);辽宁省教育厅基金项目(lnsw202005)。

摘　　要：目的 研究巨型钢管C70高强混凝土柱水化热温度场,为巨型钢管高强度混凝土柱的混凝土配合比设计、热工计算及施工养护措施制定提供依据。方法 通过试验获得巨型钢管高强度混凝土柱的温度场发展规律并考察混凝土浇筑质量,进而采用有限元软件MIDAS FEA进行温度场数值模拟,研究不同混凝土热工参数下巨型钢管混凝土柱的温度场变化规律。结果 试件温控指标未达到《大体积混凝土施工标准》(GB50496—2018)要求,但混凝土浇筑质量能够满足施工质量要求;考虑内部钢构件的模型温度场计算结果与试验结果吻合较好,理论公式求得混凝土热工参数后,用于温度场模拟得到的结果与试验结果有较大差异。结论 C70高强混凝土的温控指标可适当放宽,且应降低水化反应速率以改善巨型钢管高强混凝土柱内混凝土温度场;进行巨型钢管高强混凝土柱水化热温度场分析时,应考虑其内部钢构件。The hydration heat temperature field of super-large C70 high-strength concrete filled steel tube(CFT)columns was investigated to provide a basis for the design of concrete proportioning,thermal calculations,and the development of construction and maintenance measures for CFT columns.Firstly,the temperature field development rule of CFT columns is obtained through test,and the concrete casting quality is examined.Secondly,FEM software MIDAS FEA is used to carry out numerical simulation of the temperature field to study the temperature field change rule of the CFT column under different concrete thermal parameters.The test results show that the specimen temperature control indexes do not meet the requirements of the Standard for construction of mass concrete(GB50496-2018),but the quality of concrete casting can meet the construction quality requirements.The simulation results of the model temperature field considering the internal steel members are in good agreement with the experimental results,and the thermal parameters of the concrete obtained from the theoretical equations are used for the temperature field simulation,and the results obtained are quite different from the experimental results.The temperature control index for C70 high-strength concrete can be appropriately relaxed,and the hydration reaction rate should be reduced to improve the concrete temperature field within the CFT columns.The internal steel components should be taken into account when performing the analysis of the CFT columns.

关 键 词：巨型钢管柱 高强混凝土 水化热 内部构件 温度场 数值模拟 

分 类 号：TU398[建筑科学—结构工程]