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首页> 外文期刊>Magazine of Concrete Research >Seismic behaviour of RC columns with lap-spliced crossties under various axial loads
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Seismic behaviour of RC columns with lap-spliced crossties under various axial loads

机译：搭接交叉钢筋混凝土柱在不同轴向载荷下的抗震性能

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摘要

Lap-spliced crossties are formed from the lap splicing of two J-shaped reinforcement bars (rebars) with a 180 degrees hook on one end and a straight end on the other. In this study, cyclic lateral load testing of four large-scale reinforced-concrete (RC) column specimens was performed. Moreover, the integrity of lap-spliced crossties and the seismic performance of RC columns with lap-spliced crossties under various axial load ratios were examined. The results indicated the following. (i) Under various axial load ratios, column specimens with lap-spliced crossties were verified to possess favourable seismic performance and effectiveness in confining the concrete core. (ii) For all specimens with lap-spliced crossties, the straight ends of the J-shaped reinforcement bars did not slide toward the column interior. This indicated that the two J-shaped reinforcement bars were effectively combined into a crosstie with 180 degrees hooks on both ends. (iii) Compared to conventional crossties, lap-spliced crossties are not only easier to install but also more effective in confining core concrete since lap-spliced crossties possess two effective seismic hooks while conventional crossties possess just one.
机译：搭接接头由两个J形钢筋（钢筋）搭接而成，一端有一个180度的钩子，另一端有一个笔直的头。在这项研究中，对四个大型钢筋混凝土（RC）柱样本进行了循环侧向荷载测试。此外，还研究了搭接接头的完整性以及在各种轴向载荷比下具有搭接接头的RC柱的抗震性能。结果表明如下。 （i）在各种轴向载荷比下，经过验证的搭接交叉的圆柱试样具有良好的抗震性能，并能有效地约束混凝土芯。 （ii）对于所有搭接交叉的标本，J形钢筋的笔直端都不会滑向柱子内部。这表明这两个J形钢筋有效地组合成一个在两端带有180度弯钩的领带。 （iii）与传统的交叉路口相比，搭接的交叉路口不仅易于安装，而且在约束核心混凝土方面更有效，因为搭接的交叉路口具有两个有效的地震钩，而传统的交叉路口仅具有一个。

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