保温混凝土空心剪力墙热工性能分析

Research on thermal performance experiment of thermal concrete hollow shear walls

建筑节能和建筑工业化是我国建筑产业的发展趋势,课题组结合我国的发展形势和自身对混凝土的研究,提出一种新型剪力墙结构体系——保温混凝土空心剪力墙结构体系。对保温混凝土空心剪力墙结构体系的热工性能试验和热分析模拟进行介绍及分析。以保温混凝土空心剪力墙为研究对象,采用热流计法,对2片足尺试件进行热工性能试验,并将试验测得的传热系数值与热分析模拟值进行对比分析。试验结果表明:夏热冬冷地区建筑体形系数≤0.4时,保温混凝土空心剪力墙可以满足当地节能设计要求;钢筋作为一种金属材料,使得混凝土墙体的传热系数增大,但是影响不大,传热系数提高5.5%;ANSYS数值仿真模拟墙体传热过程结果与试验结果拟合度高,误差为3.5%左右;如果在墙体空心间层内表面填充保温材料或者粘贴低辐射系数材料,墙体的热工性能将显著提高,完全可以满足夏热冬冷地区节能设计要求。

Architecture energy-saving and industrialization are the development tendencies of the architecture industry in China.The project group integrates the development tendency in China and its own research on concrete,so as to propose a new type of shear wall structural design-warm-keeping concrete hollow shear wall structure system.It analyzes the thermal performance experiment of warm-keeping concrete hollow shear wall structural system and the thermal analysis as well as modeling.We take the warm-keeping concrete hollow shear wall as the research subject,adopts heat flow metering method to conduct thermal performance experiment on two piece of trial pieces an inch long,and compare and analyze the coefficient of heat transfer tested in the experiment and the heat analysis value.The experiment result shows when the building shape coefficient in the area hot in summer and cold in summer is smaller if not equal to 0.4,the concrete warm-keeping hollow shear wall can meet the energy-saving design requirements locally.As a metal material,concrete increases the heat transfer coefficient of the concrete wall,but the influence is small,the heat transfer coefficient has increased by 5.5%.ANSYS value simulation value has a high fitness with the result of the experiment,the error is around 3.5%,filling warm-keeping material on the inner surface of the hollow tier of the wall or pasting material with low radiation coefficient,and the thermal coefficient of the wall will increase dramatically,fully capable of meeting the energy-saving design requirements of areas hot in summer and cold in winter.