Past lateral cyclic or seismic tests of concrete frames with smooth bars in columns are very few and limited as far as the test structure’s size and geometry are concerned; moreover, they have not focused on the effect of detailing and lap-splicing of such bars on local and global behaviour. To help fill this knowledge gap with new data, the paper presents the cyclic lateral load test of a 2:3-scale three-storey, one-by-two-bay, strong beam-weak column RC frame, focusing on the effects of the column’s smooth bars and of their detailing on local and global behaviour. Slippage of bars caused concentration of column deformations in flexural cracks at the top and base sections and gave to the global hysteresis loops a shape typical of bond-slip behaviour, but without cyclic strength decay. Despite chord rotation demands of up to 0.055 rads and storey drifts of almost 5%, damage was limited and had nothing to do with the use of smooth bars in the columns. Despite the important role of bar slippage for the response, bar strains show that wherever the surrounding concrete was in compression, column bars were in compression as well. Lap splices at and/or FRP wrapping of column end regions did not have systematic effects on column behaviour. Overall, no adverse effect of the use of smooth bars was identified.

中文翻译：

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反复侧向荷载作用下带滑筋的三层混凝土框架结构试验研究

就测试结构的尺寸和几何形状而言，过去对带有光滑杆的混凝土框架进行的侧向循环或地震测试很少，而且受到限制。此外，他们还没有关注这种条的细节和搭接对当地和全球行为的影响。为了帮助利用新数据填补这一知识空白，本文提出了一个2：3比例的三层，一乘两舱，强横梁弱柱RC框架的循环侧向荷载测试，重点研究了专栏的平滑条及其关于本地和全球行为的详细信息。钢筋的滑动会导致柱形变形集中在顶部和底部的挠曲裂纹中，并使整体滞后回线具有粘结滑动行为的典型形状，但没有循环强度衰减。尽管和弦旋转要求高达0。055拉德和层间漂移接近5％，损坏受到限制，与在柱中使用光滑条无关。尽管钢筋滑移对于响应起着重要作用，钢筋应变显示，无论周围混凝土受压，圆柱钢筋也受压。柱端区域的搭接接头和/或FRP包裹对柱的行为没有系统的影响。总体而言，未发现使用光滑棒的不利影响。柱端区域的搭接接头和/或FRP包裹对柱的行为没有系统的影响。总体而言，未发现使用光杆的不利影响。柱端区域的搭接接头和/或FRP包裹对柱的行为没有系统的影响。总体而言，未发现使用光滑棒的不利影响。