A lap-spliced crosstie comprises two J-shaped rebars, each with a 180° hook at one end and straight at the other end. Six large reinforced concrete columns subjected to lateral cyclic loading were tested. The results indicated the following: (1) the confining effect of horizontally lap-spliced crossties is similar to that of vertically lap-spliced crossties. (2) Splice length of the lap-spliced crossties that is smaller than the code requirement can also provide sufficient concrete confinement. (3) A method for determining required lap splice length for lap-spliced crossties is proposed. (4) The lap-spliced crosstie can considerably improve the constructability of the crossties. Furthermore, the construction quality of reinforced concrete column reinforcement and the seismic resistance capability of reinforced concrete structures can be significantly upgraded.

中文翻译：

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循环荷载作用下钢筋混凝土柱搭接横梁搭接长度研究

搭接拼接横梁由两根 J 形钢筋组成，每根钢筋的一端有一个 180° 的弯钩，另一端是直的。对六个承受横向循环荷载的大型钢筋混凝土柱进行了测试。结果表明：（1）水平搭接横梁的围护效果与垂直搭接横梁相似。(2) 小于规范要求的搭接横梁的拼接长度也可以提供足够的混凝土约束。(3) 提出了一种确定搭接横梁所需搭接长度的方法。(4) 搭接式枕木可以大大提高枕木的施工性。此外，