超轻质加气混凝土自保温体系的典型热桥柱构造优化  

Optimization of Typical Thermal Bridge in Self-insulation System of Ultra-light Aerated Concrete

作　　者：戴绍斌[1] 倪青荣 黄俊[1] 刘记雄[1] 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《建筑节能》2014年第12期18-21,共4页BUILDING ENERGY EFFICIENCY

基　　金：国家科技支撑计划项目(2011BAJ03B03);武汉市科技计划项目(2014070504020242);武汉理工大学自主创新研究基金项目(145206006)

摘　　要：为满足建筑节能65%的设计要求,对现有加气混凝土砌块进行优化调整,开发出一种超轻质加气混凝土砌块。利用ANSYS软件对超轻质加气混凝土砌块自保温体系典型热桥进行二维稳态传热分析,研究不同保温情况下典型热桥的热桥影响区域及该区域内的热损显著程度,并根据热桥影响区域对热桥节点进行优化,即将热桥局部保温层向两侧墙体延伸200 mm。对比分析后得出,优化后的热桥节点能解决墙柱接触部位的漏热问题,降低热桥部位的耗热能力,在一定情况下可将热桥局部保温层厚度减薄10 mm左右,该热桥构造方式能有效阻断热桥。In order to meet energy-saving 65% requirement, an ultra-light aerated concrete block is developed by means of optimization and improvement to the existed aerated concrete block. The topic thermal bridge in self-insulation system of ultra-light aerated concrete is studied by ANSYS with two-dimensional steady state model. The influencing zone of the thermal bridge is researched in different insulation conditions. Moreover, the significance level about the heat consumption of the influencing zone is analyzed.For this reason, a improved thermal bridge joint is proposed, which refers to the structure that the external insulating layer of the column is extended to both sides 200 mm. The results show that the improved thermal bridge structure can realize the insulation layer thickness reduction about 10 mm under a certain condition,and can also eliminate the heat loss from the junction of wall and column. The heat loss can be blocked effectively by the thermal bridge joint.

关 键 词：超轻质加气混凝土砌块 自保温体系 热桥柱 热桥影响区域 构造优化 

分 类 号：TU111.4[建筑科学—建筑理论]