轻钢-泡沫混凝土组合墙体有限元分析

Finite element analysis of light steel-foam concrete composite wall

采用ABAQUS软件对轻钢-泡沫混凝土组合墙体进行了模拟计算与分析,共模拟设计了6个与试验尺寸大小相同的组合墙体模型,分析了组合墙体的变形、组合墙体及型钢骨架正面与反面的应力损伤、其墙体顶点部位荷载-位移变化关系、墙体倾覆时的荷载-位移变化关系、试验墙体与模拟墙体倾斜变形对比、墙体内型钢骨架和泡沫混凝土的应变发展规律,并分别与试验结果做了对比分析。结果表明:材料屈服在弹性范围内时,随着荷载的增加,墙体顶点处和墙体倾覆时的位移逐渐增加;但是,随着荷载的继续增加,材料屈服进入弹塑性阶段之后,其位移反而出现了一定的下降,这说明此种组合墙体具有良好的延性性能。

In this paper,ABAQUS software was used to simulate and analyze the light steel-foam concrete composite wall,and six composite wall models with the same size as the test were simulated and designed.This paper analyzed the deformation of the composite wall,the negative and positive stress damage of the composite wall and steel skeleton,its wall vertex part load-displacement change relation,the load-displacement change relation during wall upsetting,the comparison of inclined deformation between test wall and simulated wall,and the strain development law of foam concrete and steel skeleton in wall,which were compared with the test results respectively.The results show that when the material yield is in elastic range,with the increase of load,the displacement of wall vertex part and during wall upsetting increases gradually.But as the load continues to increase,the material yield enters elastic-plastic stage,the displacement has a certain decline.It suggests that this kind of composite wall has good ductility performance.