不同生态材料复合墙体力学性能对比分析

COMPARATIVE ANALYSIS OF THE MECHANICAL PROPERTIES OF COMPOSITE WALL FILLED WITH DIFFERENT ECOLOGICAL MATERIAL

生态复合墙结构内填材料的多元化选择已成为生态复合墙发展的新亮点。通过对目前国内外研究较为成熟、应用较为广泛的几种新型建材单轴受压本构模型及优缺点等的介绍,对内填材料的应力-应变关系作了对比分析;最后,引入双剪统一强度理论推导出各种内填材料的多轴弹塑性本构关系,并且利用ABAQUS有限元分析软件对填有不同材料的复合墙体作了数值模拟对比分析,得出它们在生态复合墙结构体系中的适用范围。研究表明:陶粒砌块可用于中高层生态复合墙结构;加气混凝土块和发泡砌块可用于多层生态复合墙结构;草砖适用于低层生态复合墙结构;而石膏由于其延性和耐久性较差,不建议用于该结构体系。

Various choices of fill material within the ecological complexes of the wall structure became a problem that needs solution. It was presented that the preparing process, uniaxial compression constitutive model merits and demerits of several new types of building malerials, which are more widely used at home and abroad. Comparing analysis of the stress-strain relation of several ecological blocks was done. Finally the twin shear unified strength theory was used to derive muhi-axial elastic-plastic constitutive relation, and a numerical simulation of comparative analysis was also done for composite wall filled with different materials by ABAQUS to draw their scope of ecological composite wall structure system. Studies have shown that：ceramic blocks can be used in middle-high rise buildings; aerated blocks and foam blocks can be used in multi-storey buildings; grass tiles can be used in low-rise buildings; while the plaster, due to its poor ductility and durability, is not recommended for the structural system.