基于现场试验的混凝土表面放热系数反演和计算方法改进  

In-situ experiment-based inversion and improvement of calculation method for concrete surface heat release coefficient

作　　者：刘毅[1,2,3] 董武[4] 吴正桥[5] 杨宁 胡筱 李海枫[3] 朱振泱[3] LIU Yi;DONG Wu;WU Zhengqiao;YANG Ning;HU Xiao;LI Haifeng;ZHU Zhenyang(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Key Laboratory of Water Project Construction and Safety,Ministry of Water Resources,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Department of Structure and Materials,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Xinjiang Irtysh River Basin Development Administrative Bureau,Urumchi 830002,Xinjiang,China;China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin 300222,China;China Three Gorges Projects Development Co.Ltd.,Beijing 100038,China;PowerChina Chengdu Engineering Co.,Ltd.,Chengdu 611130,Sichuan,China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]中国水利水电科学研究院水利部水工程建设与安全重点实验室,北京100038 [3]中国水利水电科学研究院水电中心,北京100038 [4]新疆额尔齐斯河流域开发工程建设管理局,新疆乌鲁木齐830002 [5]中水北方勘测设计研究有限责任公司,天津300222 [6]中国三峡建设管理有限公司,北京100038 [7]中国电建集团成都勘测设计研究院有限公司,四川成都611130

出　　处：《水利水电技术（中英文）》2021年第8期1-10,共10页Water Resources and Hydropower Engineering

基　　金：国家重点研发计划项目(2018YFC0406703);国家自然科学基金资助项目(51779277);中国水科院科研专项(SS0145B712017,SS0145B612017,SS0145B392016);流域水循环模拟与调控国家重点实验室资助项目(SKL2020ZY10,SS0112B102016);中国长江三峡集团有限公司科研项目资助(WDD/0426)。

摘　　要：目前常用的混凝土表面放热系数的计算方法存在参数取值不明确、可实施性差的问题。为此,基于多个工程大量的试验数据并采用先进的反演分析方法,对覆盖不同保温材料的混凝土表面放热系数进行反演分析。结果表明,混凝土的表面放热系数和保温材料黏结状态密切相关。即,不吸水保温材料底部积水对表面放热系数影响很大,无积水时不吸水保温材料底部潮湿状况的影响相对较小。在此基础上,对现有表面放热系数计算方法进行了改进,改进后的方法参数选取更加明确,更具备可实施性。At present,the problem of unclear parameter values with poor availability is there in the commonly used method for the calculation of the concrete surface heat release coefficient.Therefore,the surface heat release coefficients of the concretes covered by different insulation materials are inversely analyzed with the relevant advanced inversion analytic method based on a large amount of experimental data obtained from several projects.The results show that the concrete surface heat release coefficient is closely related to the bonding status of the insulation materials,while the influence from the concrete surface water content on the surface release coefficient is less under the normal construction condition.On the basis of this,the existing method for calculating the surface heat release coefficient is improved,and then the parameter selection made by the improved method is not only more clear,but is also more feasible.

关 键 词：表面放热系数 保温材料 湿度 混凝土表面 

分 类 号：TV315[水利工程—水工结构工程]