摘要
实验研究了延伸变形在带肋钢筋中的分布。发现横肋对称的钢筋,延伸变形呈明显正弦规律分布;而横肋非对称的,变形相对均匀,无明显规律。随着变形量增加,变形分布的不均匀程度加重。分析表明:横肋对称的带肋钢筋,其不均匀程度较横肋非对称的严重,当钢筋整体变形达到2 .8%时,前者为后者的2 .5 倍。从抗震的角度出发,建议提倡使用横肋非对称的带肋钢筋,且两侧横肋最好以肋间距的1/2交替分布。
The longitudinal extension distributed in the rebar has been studied. It is found that,when the transverse ribs distribute symmetrically, the extension follows sine relation, while unsymmetrically, it is relatively homogeneous and does't present regular character. With the increase of deformation, the distribution will be even more inhomogeneously. It shows that the deformation of the rebar with the symmetrically distributing transverse ribs is more inhomogeneous than that with the unsymmetrically distributing ones. When the deformation reaches 2 8%, the former's degree is 2 5 times of the latters. The author suggests to architect using rebar with symmetrically distributing transverse ribs in order to resist earthquick, and the interval between two ribs had better be half rib spacing.
出处
《中国冶金》
CAS
2005年第3期25-28,38,共5页
China Metallurgy
