由不同物理力学性能材料组成的复合轻质外保温墙体，在多因素的作用下引起整体粉刷墙面的开裂、脱落等破坏现象。试验按照实际工程构造尺寸制作了两组六个试件，通过冷热箱、密封试件真空负压组合试验装置，按1∶1相似比模拟温度、重力、风力等作用，对不同因素组合工况测试各构造层在温度与荷载共同作用下的耦合效应，给出了不同工况下保温层及饰面层各测点的温度场分布规律，整理出了耦合效应的应力变化特征相关曲线。试验成果可为研究解决外保温墙面破坏问题提供借鉴。%The outer thermal insulating wall with lightweight layer is composed of the material layers with different physi -cal and mechanical properties .Under the impact of multiple external factors ,the interplays between different layers woul cause the whole plaster skin cracked and fallen off .Six pieces of specimen based on practical project are made with the scale of 1∶1 and classified into two groups ,the impacts from temperature ,gravity and wind are simulated by the experi-ments with the special device which consists of hot-cold boxes ,sealed box and vacuum pump .Then ,in different given conditions with multiple external factors ,the relationship and distribution of stress and strain are tested ,and the distribu-tion of temperature and the characteristic curves of coupling stress in different given conditions are also sorted out .The test results could provide some references to solve the damage problems of the plaster skin of the composite wall with outer thermal insulating light-weight layer .
展开▼
