摘要
随着我国建筑节能、墙体改革等相关政策的推行,开发有效的建筑节能围护材料成为土木工程领域首要任务之一。在此背景下,太原理工大学进行了玻化微珠保温混凝土试验研究(太原市城建科研计划项目(并建管字(2006)210号,并财城(2006)263号))。玻化微珠保温混凝土是一种既具有一般混凝土的物理力学性能,又具有保温性能,绿色、环保的高效益生态建筑材料。本文对玻化微珠保温混凝土的抗压强度和保温性能进行了试验研究,并基于试验数据的基础上模拟分析了玻化微珠保温混凝土建筑的抗震性能和能耗情况。
在正交设计理论的指导下,课题组测定了玻化微珠保温混凝土试件抗压强度和导热系数,并对试验数据进行了分析。
应用ANSYS大型分析软件,分析和对比了玻化微珠保温混凝土和普通混凝土剪力墙结构的抗震性能。
应用DeST-h软件,建立了一栋六层单元住宅楼模型。模拟和对比了围护结构分别为玻化微珠钢筋混凝土和普通钢筋混凝土时,空调季、采暖季及全年的单个房间、单个系统和整栋建筑的能耗情况。
由上述分析内容得出以下结论:
1、玻化微珠保温混凝土导热系数随着玻化微珠掺量的加大迅速下降,当接近粘土砖的导热系数时,抗压强度高于粘土砖,基本达到试验预期效果,验证了玻化微珠保温混凝土在工程上的可用性。
2、得出了影响玻化微珠保温混凝土抗压强度和导热系数的主次因素,和玻化微珠掺量与导热系数关系的回归直线方程。
3、玻化微珠保温混凝土剪力墙结构的自振周期比对应的同阶普通混凝土剪力墙结构自振周期大,在反应谱作用下,玻化微珠保温混凝土剪力墙结构最大弹性层间位移角远小于规范规定的位移角限值,层剪力要比对应的普通混凝土剪力墙结构层剪力小。玻化微珠保温混凝土剪力墙结构不仅完全能够满足抗震规范要求,而且有比普通混凝土更好的抗震性能。
4、围护结构为玻化微珠钢筋混凝土的建筑热能消耗比对应的围护结构为普通钢筋混凝土的建筑在整个采暖季、整个空调季和全年均有大幅度的降低。
本文的分析验证了玻化微珠保温混凝土是一种结构兼保温新型的节能建材,同时也为本课题的深入研究乃至玻化微珠保温混凝土将来的推广和应用提供了宝贵的参考数据。
对玻化微珠保温混凝土的试验研究在全国尚属首次,目前“玻化微珠保温混凝土”己获得国家知识产权局发明专利授权(专利号:ZL200610012726.2)。
With the policies implementing of energy-saving construction and wall-reform in China, developing effective energy-saving construction materials have become one of emergencies in civil engineering field. As a high efficiency ecological building material with physical and mechanical properties of traditional concrete and better thermal-insulating ability, thermal insulation glazed hollow bead concrete was researched in Taiyuan University of Technology ( project of city construction scientific research list in taiyuan). In this paper, the compressive strength and thermal conductivity of thermal insulation glazed hollow bead concrete were studied and the anti-seismic performance and energy consumption of thermal insulation glazed hollow bead concrete building were analyzed on the basis of the simulation analysis of test data.
Under the guidance of orthogonal experiment theory, the compressive strength and thermal conductivity of test block of thermal insulation glazed hollow bead reinforced concrete was determined and the data were also analyzed.
Utilized the software of ANSYS, the anti-seismic performance of thermal insulation glazed hollow bead reinforced concrete was compared with that of reinforced concrete.
Using the model of six-storey residential unit established by the software of DeST-h, the energy consumption of a single room, a single system and a entire building of thermal insulation glazed hollow bead ferroconcrete structure in air-conditioned quarter, heating quarter and a whole year was analyzed and compared with that of reinforced concrete structure.
The conclusions drawn out from the analysis listed above are as follow:
First, the thermal conductivity of thermal insulation glazed hollow bead concrete was decreased rapidly with the increase of the usage of glazed hollow bead. When the thermal conductivity of thermal insulation glazed hollow bead concrete closes to clay brick's, the compressive strength of thermal insulation glazed hollow bead concrete was higher than that of clay brick and the expectant effect was basically achieved. The applicability of thermal insulation glazed hollow bead concrete availability in engineering was also proved.
Second, the principal and subordinate factors impacting compressive strength and thermal conductivity were gained. Meanwhile, the regression equation between the thermal conductivity and the usage of glazed hollow bead was drawn out.
Third, the natural vibration period of thermal insulation glazed hollow bead concrete shear wall structure was larger than ordinary concrete shear wall structure. In the case of response spectrum, elastic interbedding displacement was very small; the shear is smaller than ordinary concrete shear wall structure. Thermal insulation glazed hollow bead concrete shear wall structure not only completely meet the requirements of anti-seismic criterion , but also better than ordinary concrete.
Fourth, the energy consumption has a greatly fall in air-conditioned quarter, heating quarter and a whole year of thermal insulation glazed hollow bead reinforced concrete structures compared with that of reinforced concrete structures.
As a new energy conservation building materials with good structural and thermal insulation performance, the feasibility of thermal insulation glazed hollow bead concrete was confirmed in this paper which was provided a valuable reference for a in-depth study and application in the future.
At present, the thermal insulation glazed hollow bead concrete which was firstly study here over all the country was granted a national invention patent.( Patent No :ZL200610012726.2)
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