365-不同厚度EPS板在温度作用下对外墙外保温系统影响研究.pdfVIP

EPS 板在温度作用下其厚度对外墙外保温系 统影响研究 1 1 1 1 于水 ，华雪 ，刘赫 ，冯国会 （1.沈阳建筑大学 市政与环境工程学院，辽宁 沈阳 110168） 摘 要：膨胀聚苯乙烯（EPS）外墙外保温技术在我国已得到大量使用，但温度对系统 整体破坏作用不容忽视。以EPS 外墙外保温系统为例，采用沈阳市夏季外界环境条件，通过 有限元软件分析计算外墙随保温层厚度变化的受力情况。通过分析得出：EPS 保温板具有较 好的保温效果，抹面砂浆处温度变化较大，受温度影响产生的热膨胀较大，影响了系统整体 的耐久性；EPS 保温板越厚，热膨胀产生的位移越大，但是保温层两侧的热应力会减小；应 增强黏结砂浆的抗拉压能力。 关键词：外墙外保温系统；温度；热膨胀 Study on the Influence of Temperature on External Thermal Insulation System of EPS Plate with Different Thickness 1 1 1 1 Yu Shui , Hua Xue , Wang Wei , Feng Guohui （1. Shenyang Jianzhu University School of Municipal and Environmental Engineering， Shenyang 110168，Liaoning ，China ） Abstract: The external thermal insulation technology of expanded polystyrene (EPS) has been widely used in our country. However, the effect of temperature on the whole system can not be ignored. The paper shows the force of the external thermal insulation wall with the thickness of the insulating layer in July in Shenyang. The paper shows that EPS insulation board has good thermal insulation effect and the mortar has large temperature changes so that it affects the durability of the whole system because of the thermal expansion. The paper also shows that the displacement produced by thermal expansion becomes greater with the increase of the thickness of the EPS insulation board. However, the thermal stress on both sides of the insulating layer is reduced. The tensile strength of the bonded mortar should be enhanced. Keywords: External wall insulation system; temperature; thermal expansion 外墙外保温技术作为我国北方最广泛使用的技术，其优越的保温性、耐候性已得到检验 和认可，尤其是膨胀聚苯乙烯（EPS ，expanded polystyrene ）材料在北方地区得到了大面积 使用，EPS 薄抹灰外墙外保温结构是目前较为常见的外保温形式。然而，在建筑节能需求日 益紧迫的当今时代，围护结构热负荷已成为解决建筑物能耗日益加剧的关键问题，而只加厚 保温材料势必会对围护结构整体耐候性产生影响，墙体外饰面层开裂、起鼓