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以冷弯薄壁C型钢与其两侧竹板条为组合龙骨,龙骨上下顶面与竹胶板采用胶黏剂复合,并通过内填和外贴保温隔热材料形成节能环保型钢-竹组合墙体。以墙体夹芯层填充材料种类、有无设置外保温系统及试件厚度为基本参数,对13个组合墙体试件进行传热性能试验研究,观察墙体龙骨处热桥效应和试件表面的温度变化,分析填充材料、试件厚度、挤塑聚苯板外保温系统等因素对墙体保温性能的影响,并在此基础上进行组合墙体传热性能试验值和理论值的比较分析。结果表明,内填保温玻璃棉和聚氨酯发泡的钢-竹组合墙体均具有良好的保温效果,其传热系数为0.145~0.387 W/(m~2·℃),聚氨酯型墙体保温性能优于玻璃棉型墙体,挤塑聚苯板外保温系统可降低组合墙体的热量损失,从而削弱组合龙骨所在部位的热桥效应,其影响随着保温效果的提高逐渐减弱。利用防护热板法测量墙体主要材料的导热系数,据此计算墙体传热系数,其计算结果与实测结果吻合良好,平均误差约为5%,说明可通过理论分析获得较可靠的钢-竹组合墙体传热性能评价结果。
To cold-formed thin-walled C steel and bamboo strips on both sides for the combination of keel, keel up and down the top surface and the use of adhesive bamboo compound, and through the internal and external insulation materials to form energy-saving environmentally friendly steel - bamboo composite wall body. Based on the types of materials filled in the wall of the sandwich wall, whether the external insulation system was set and the thickness of the specimen as the basic parameters, the heat transfer performance of the 13 composite wall specimens was studied. The thermal bridge effect at the keel of the wall and specimen Surface temperature changes, analysis of filler material, specimen thickness, extruded polystyrene board insulation system and other factors on the thermal insulation properties of the wall, and on the basis of composite wall heat transfer performance test value and the theoretical value of the comparison analysis. The results show that the thermal insulation glass filled with insulating glass wool and polyurethane foamed steel - bamboo composite wall has a good thermal insulation effect, the heat transfer coefficient is 0.145 ~ 0.387 W / (m ~ 2 · ℃), polyurethane wall insulation Outperforming the glass wool wall, the extruded polystyrene board external insulation system can reduce the heat loss of the combined wall body, thereby weakening the thermal bridge effect of the part where the combined keel is located, and its influence gradually decreases with the improvement of the thermal insulation effect. The heat transfer coefficient of the main wall material is measured by using the protective hot plate method, and the heat transfer coefficient of the wall is calculated. The calculated result is in good agreement with the measured result, with an average error of about 5%. This shows that the more reliable steel- Bamboo composite wall heat transfer performance evaluation results.