作　　者： (李冉）; (李玉顺）; (何佳伟）; (邬沛）;

机构地区： 宁波大学建筑工程与环境学院,浙江宁波315211

出　　处： 《工业建筑》 2017年第8期53-58,共6页

摘　　要： 钢-竹组合墙体是由薄壁型钢与其左右两侧竹板条组成龙骨区域,并在其上、下顶面利用环氧树脂胶粘贴竹胶板所组成的一种节能环保型组合墙体。为探究该类墙体节能设计的有效途径,以墙体型钢高度、夹芯层填充保温材料类型和外保温系统设置情况为参数建立16种钢-竹组合墙体有限元模型,并对其中5种较为典型的墙体进行试验来验证模型的可靠性,根据各组模型模拟结果,分析其参数对组合墙体传热性能的影响。研究结果表明:有限元模拟分析结果与试验结果吻合度高,平均误差约4%,说明该模型较为可靠。钢-竹组合墙体传热系数为0.127~0.372 W/(m2·℃),低于GB 50176—1993《民用建筑热工设计规范》对于我国严寒地区的最高要求,具有优良的保温性能;聚氨酯型组合墙体的保温性能优于玻璃棉型组合墙体,增加型钢高度可提高墙体整体保温性能,挤塑聚苯板外保温系统可明显削弱组合龙骨区的热桥效应,降低组合墙体的热量损失。在实际应用中,出于经济考虑可以把夹芯层保温材料填充物减半或者控制试件厚度,以适应不同地区的节能要求。 Steel-bamboo composite wall is a kind of combination of energy-saving and environment-friendly wall,which is composed of thin-walled steel and bamboo strips on the both left and right sides of the composition of the keel area,with the epoxy resin glue on the top and bottom of it. In order to explore the effective ways of energy-saving design of the wall,sixteen steel-bamboo composite wall models were established with the height of the wall steel,the types of the sandwich layer filled with the insulation materials and the arrangement schemes of the external insulation system as the parameters. And five typical models were tested to verify the reliability of the model. Based on the simulation results of each group of models,the influence of the parameters on the heat transfer property of the composite wall was analyzed. The results showed that the finite element simulation results were coincident with the experimental results,with an average error of about 4%,indicating that the model was reliable. The heat transfer coefficient of the steel-bamboo composite wall was 0. 127 ~ 0. 372 W/（ m2· ℃）,lower than the standard GB50176—1993 for the highest requirements in cold area of our country,which meant that it had excellent thermal insulation properties; thermal insulation performance of the polyurethane composite wall insulation properties was better than that of the glass cotton composite wall. The results showed that the thermal insulation performance of the wall could be improved by increasing the height of the steel section,and the thermal bridge effect of combined keel area could be obviously weakened by the extruded polystyrene board. For economic considerations,the sandwich core insulation materials could be filled half or control the thickness to meet the energy requirements of different areas in practical application.

关 键 词： 组合墙体 有限元分析 薄壁型钢 竹胶板 传热系数