4种结构用热断桥材料基本力学与热工性能试验

龚超; 侯兆新; 梁梓豪; 吴兆旗; 梁伟桥; 方五军

doi:10.13204/j.gyjzG21030909

4种结构用热断桥材料基本力学与热工性能试验

doi: 10.13204/j.gyjzG21030909

1. 中冶建筑研究总院有限公司, 北京 100088;
2. 中冶建筑研究总院(深圳)有限公司, 广东深圳 518055;
3. 哈尔滨工业大学(深圳)土木与环境工程学院, 广东深圳 518055;
4. 福州大学土木工程学院, 福州 350108

基金项目:

国家重点研发计划项目（2017YFC0703807）。

详细信息

作者简介:
龚超,男,1981年出生,博士,教授级高级工程师。电子信箱:gongchao6330@163.com

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出版历程
- 收稿日期: 2021-03-09
- 网络出版日期: 2023-03-22

Experimental Research on Mechanical and Thermal Properties of Four Insulating Materials for Heat Bridge Effect

1. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China;
2. Central Research Institute of Building and Construction (Shenzhen) Co., Ltd., MCC, Shenzhen 518055, China;
3. School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China;
4. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

摘要

摘要: 热断桥连接技术可以有效解决钢结构外挑构件冷热桥问题，热断桥材料的选用是热断桥节点技术的核心，目前关于热断桥连接和热断桥材料的研究较少。通过调研，筛选出尼龙6、刚性聚氯乙烯、环氧树脂玻璃纤维和聚醚醚酮作为热断桥备选材料；针对以上4种材料进行了40个试件的压缩性能试验和12个试件的导热系数测定试验，获得了4种复合材料的压缩强度、压缩弹性模量、导热系数等物理性能指标；采用"最远点法"得到了材料的屈服点，利用Sherwood-Frost模型拟合得到了4种材料的受压本构模型；结合材料力学性能、热工性能和经济性，综合分析了4种材料作为热断桥材料的适应性。结果表明：尼龙6、刚性聚氯乙烯和聚醚醚酮试件呈延性破坏模式，环氧树脂玻璃纤维呈脆性分层破坏模式；尼龙6、刚性聚氯乙烯和聚醚醚酮三种材料的屈服强度分别为60.1，50.4，125.8 MPa，导热系数分别为0.175 5，0.142 4，0.231 8 W/（m·K）；综合考虑力学性能、热工性能和经济性，环氧树脂玻璃纤维综合性能最好，尼龙6次之，刚性聚氯乙烯最低，聚醚醚酮由于成本过高，不适宜作为热断桥材料。
- 热断桥节点 /
- 热断桥材料 /
- 压缩性能 /
- 导热系数 /
- 冷热桥
Abstract: Thermal break connection can effectively deal with the problem of thermal bridge effect within the overhanging steel components. The selection of thermal insulation materials is a key to thermal break connection technology while there are few research focused on it. Materials of PA6, PVC, FR4 and PEEK were selected for the potential insulating materials through extensive investigations. A total of 40 compressive tests and 12 thermal conductivity tests of PA6, PVC, FR4 and PEEK were conducted, and their compressive strength, compressive modulus of elasticity, and thermal conductivity coefficients were recorded. The yielding points were studied by using the Farthest Point Method, and the compressive constitute models were obtained by curve-fitting according to Sherwood-Frost model. Combined with the performances of these four materials including mechanical properties, thermal properties and economy, the adaptability of these four materials used in thermal break connections was analyzed. The results indicated that PA6, PVC and PEEK specimens showed a ductile failure mode, while FR4 showed a laminated brittle failure mode. The tested yield strength were 60.1, 50.4 and 125.8 MPa respectively for PA6, PVC and PEEK, while their thermal conductivity coefficients were 0.1755, 0.1424 and 0.2318 W/(m·K), respectively. It was found that FR4 showed the best comprehensive performance while PA6 took the second place, and PVC took the last place. Due to its high cost, PEEK is not appropriate for thermal break material in practical engineering.
- thermal break connection /
- insulating material for heat bridge effect /
- compressive properties /
- thermal conductivity coefficient /
- thermal bridge

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