新型轻钢龙骨复合墙体热、湿性能研究  

Thermal and wet performance analysis of a new light steel keel composite wall

作　　者：郑伟花 冯泽华 ZHENG WeiHua;FENG ZeHua(School of Civil Engineering and Architecture,Hebei University,Baoding 071002,China)

机构地区：[1]河北大学建筑工程学院,保定071002

出　　处：《北京化工大学学报（自然科学版）》2024年第6期61-70,共10页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：河北大学高层次人才引进项目(521000981383)。

摘　　要：为了精准预测轻钢龙骨复合墙体内部温湿度分布规律,解决当前建筑维护结构保温防湿性能研究不足的问题,提出了通过数值模拟的方法对复合墙体内部温湿性能进行分析研究。基于多孔介质传热传质理论,以轻钢龙骨复合墙体为研究对象,采用轻钢龙骨复合墙体三维瞬态的热湿耦合数学模型进行研究。对比分析不同腹板开孔长度和构造形式以及加入隔汽层对复合墙体内部热湿性能的影响,得出复合墙体内部的热湿耦合瞬态变化规律。实验结果表明:腹板开孔轻钢龙骨的存在对复合墙体内部的温湿度变化规律具有显著影响,开孔不同则材料内部的温湿度变化也不相同;在轻钢龙骨复合墙体中不同内夹层在性能上存在着明显的差异,聚苯乙烯泡沫(EPS)的保温吸湿效果优于泡沫混凝土;从防止发生冷凝的角度考虑,在加入隔汽层后,泡沫混凝土的保温和防湿性能皆有所提高,这说明在墙体内部加入防湿层可有利于防止发生冷凝现象。To precisely predict the distributional dynamics of temperature and humidity within the composite structure of a light steel keel,and to address the paucity of research concerning the thermal insulation and moisture exclusion capabilities of the prevailing building envelopes,we have introduced this study introduces a numerical simulation approach.This method was employed to scrutinize and examine the thermal-moisture characteristics embedded within the composite wall.Anchored in the tenets of heat and mass transfer phenomena within porous media,the research confines its focus to the light steel keel composite wall.A three-dimensional transient heatmoisture coupled mathematical model specific to the light steel keel composite wall is adopted.The study evaluates and scrutinizes the thermal and moisture attributes of the composite wall under varying configurations of web opening lengths,structural configurations,and the incorporation of a vapor barrier.Moreover,the simulation elucidates the transient interplay of thermal and moisture dynamics within the composite wall.Findings from the experimental analysis indicate that the presence of light steel keels pierced with web holes markedly alters the temperature and humidity profiles within the composite wall,with variations being dependent on the hole configuration.Notably,distinct performance disparities are discernible among various interlayer materials within the light steel keel composite wall.Expanded polystyrene(EPS)demonstrates superior thermal insulation and moisture adsorption capabilities relative to foam concrete.Furthermore,the introduction of a steam insulation layer enhances the thermal insulation and moisture-resistant properties of foam concrete,thereby mitigating condensation risks.This suggests that the integration of a moisture-proof layer within the wall matrix is instrumental in condensation prevention.

关 键 词：轻钢龙骨 数值模拟 热湿传递 隔汽层 

分 类 号：TU391[建筑科学—结构工程]