当锚固长度达一定值时，再进一步增加锚固长度，锚固力的增大是非常有限的；

When anchorage length reaches a constant value, the increase of anchoring strength is limited although with further increase of anchorage length.

此外，极限粘结强度也随着锚固长度、钢筋直径的增大而减小。

In addition, the ultimate bond strength decreases with the increase of anchorage length and bar diameter.

介绍了国内外规范计算纵筋在混凝土中锚固长度的方法.

Anchorage length calculation methods of longitudinal steel bars in different building codes are introduced and compared.

运用局部变形假定,推导出工程临界锚固长度的数学表达式.

Mathematic representation for critical anchorage length has been deduced on the basis of local - deformation assumption.

建立了粘结应力沿锚固长度的分布模式.

The distribution model of bond stress over the splice length is developed.

无桩尖管桩锤打过程易造成管桩移位 、 内伤 、 断桩 、 嵌岩差 、 持力层锚固长度小.

Shift, internal injury, breaking, bad imbedded in rock, as well as short anchorage distance etc.

提出了进一步需要研究的“锚固长度”问题。

Finally, the problems to be further studied are pointed out.