新型夹芯保温叠合楼板的传热机理及热工性能研究  

Research on the Heat Transfer Mechanism and Thermal Performance of Sandwich Thermal Insulation Composite Floor Slabs

作　　者：贺庆澳 张明山[1,3] 李本悦 邓华 徐铨彪[1,3] HE Qing-ao;ZHANG Ming-shan;LI Ben-yue;DENG Hua;XU Quan-biao(Center for Balance Architecture,Zhejiang University,Hangzhou 310058,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;The Architectural Design&Research Institute of Zhejiang University Co.,Ltd.,Hangzhou 310063,China)

机构地区：[1]浙江大学平衡建筑研究中心,浙江杭州310058 [2]浙江大学建筑工程学院,浙江杭州310058 [3]浙江大学建筑设计研究院有限公司,浙江杭州310063

出　　处：《混凝土与水泥制品》2023年第5期68-73,共6页China Concrete and Cement Products

摘　　要：将保温层置于混凝土叠合楼板的预制底板和现浇顶板之间,提出了一种新型夹芯保温叠合楼板(以下简称新型叠合板),建立了稳态传热分析有限元模型,研究了桁架钢筋间距、夹芯层厚度等对新型叠合板传热系数的影响。结果表明:为满足规范传热要求,夹芯层厚度需超过20 mm、材料导热系数需小于0.15 W/(m·K);新型叠合板热桥效应明显,桁架钢筋对结构传热系数影响可达13.5%;随着夹芯层保温效果的提高,桁架钢筋间距造成的热阻变化占整体热阻的比例逐渐提高,但占钢筋总影响的比例降低。此外,通过对样本模型数据进行回归分析,得到了具有较高精度的传热系数计算公式,可以用来评估此类新型叠合板的保温性能。A new type of sandwich thermal insulation composite floor slabs was proposed,in which the thermal insulation layer was placed between the precast bottom plate and the cast-in-place top plate of reinforced concrete composite floor slabs.The effects of parameters,such as the spacing between the truss bars and the thickness of the sandwich layer,on the thermal transmittance of the sandwich thermal insulation composite floor slabs were investigated.The results show that,the thickness of sandwich layer should exceed 20 mm,and the thermal conductivity of the material should be less than 0.15 W/(m·K)to meet the heat transfer requirements of the specification.The thermal bridge effect of the sandwich thermal insulation composite floor slabs is obvious,with an impact on the thermal transmittance of the structure up to 13.5%.With the improvement of insulation effect of sandwich layer,the proportion of thermal resistance variation caused by the change of truss spacing to the overall thermal resistance gradually increases,but its proportion to the total influence of truss bars decreases.In addition,a new formula for calculating the thermal transmittance with high accuracy is obtained through the regression analysis of the sample model data,which can quickly evaluate the thermal insulation performance of this new type of composite floor slabs.

关 键 词：新型夹芯保温叠合楼板 热桥效应 桁架钢筋 参数化分析 传热系数 回归分析 数值分析 

分 类 号：TU375[建筑科学—结构工程]