摘要
国内外研究及设计规范大多采用棱柱体或圆柱体作为混凝土轴心抗压强度的标准试件,对长方柱的抗压强度研究较少。通过对16组不同尺寸的混凝土长方柱的轴压试验,研究其极限荷载及抗压强度。结果表明:长方柱混凝土抗压强度随着长、宽、高的增加而降低,具有明显的尺寸效应;并通过分析拟合得到轴心抗压强度的尺寸效应修正系数,轴心抗压强度修正值和极限荷载修正值均与试验值较为接近。
In a large amount of researches and current design codes at home and abroad,prisms or cylinders were used as the standard specimens in the standard compressive strength tests, while they didn＇t consider the compressive strength of rectangular concrete specimens.The ultimate load and the compressive strength based on 16 groups of rectangular concrete specimens with different sizes under axial compressive tests was studied.The results showed that the compressive strength of rectangular concrete specimens reduces as the length, width or height increasing, and size effect was matched obviously;modified coefficients of the axial compressive strength were proposed according to the size effect of rectangular concrete specimens, and the modified axial compressive strength and the modified ultimate load were relatively close to the experimental values.
出处
《混凝土》
CAS
CSCD
北大核心
2013年第5期1-5,共5页
Concrete
基金
国家自然科学基金重点项目(50838001)
关键词
混凝土长方柱
轴心抗压强度
尺寸效应
试验研究
rectangular concrete specimen
axial compressive strength
size effect
experimental study
