含組合繫筋及組合內箍筋RC柱之耐震性能

The Seismic Performance of Reinforced Concrete Columns Using the Lap-spliced Crosstie and Lap-spliced Inner Hoop

李台光(Tai-Kuang Lee) ； 陳正誠(Cheng-Cheng Chen)

《結構工程》 30卷1期 (2015/03) Pp. 34-52

https://doi.org/10.6849/SE.201503_30(1).0003

摘要

組合繫筋為由兩支一端為180度彎鉤另一端為直線的J形鋼筋搭接組合而成；組合內箍筋為由兩支U形鋼筋搭接組合而成。本研究完成4支大尺寸鋼筋混凝土柱試體之反復側向載重試驗，探討含組合繫筋及組合內箍筋柱之耐震性能。研究結果顯示：（1）含組合繫筋及組合內箍筋試體之韌性，明顯比含傳統繫筋之試體優異，也比含兩端皆為180度彎鉤一體繫筋之試體佳；（2）組合繫筋及組合內箍筋的施工性佳，尤其是組合繫筋不但施工簡便且施工誤差可降到很低，可以明顯提升RC柱鋼筋之施工品質及RC結構之耐震性能；（3）組合繫筋及組合內箍筋以鋼筋拉力搭接組合而成，本文提供滿足搭接長度需求所需之最小柱尺寸，方便工程實務應用。

關鍵字

組合繫筋 ； 組合內箍筋 ； RC柱 ； 耐震性能

並列摘要

A lap-spliced crosstie consists of two J-shaped steel bars (rebars) that have a straight end and an end featuring a 180° hook. A lap-spliced inner hoop is the lap splice of two U-bars. In this study, a lateral cyclic load test was conducted on four specimens of large-sized reinforced concrete (RC) columns to investigate the seismic resistance capability of RC columns comprising lap-spliced crossties and lap-spliced inner hoops. The research results are presented as follows: (a) The ductility of the specimens that adopted the lap-spliced crossties and lap-spliced inner hoops was significantly superior to that of the specimens using conventional crossties and crossties featuring a 180° hook on the two ends. (b) The constructability of the lap-spliced crossties and lap-spliced inner hoops was satisfactory. In particular, using lap-spliced crossties in construction is easy and produces a low possibility of construction errors. Therefore, the construction quality of RC column reinforcement and the seismic resistance capability of RC structures can be substantially increased. (c) The lap-spliced crosstie and lap-spliced inner hoop were formed on the basis of the tension lap splice of rebars. The column size used in this study fulfilled the minimum column size requirement for lap splice and can therefore be conveniently applied in engineering practices.

並列關鍵字

lap-spliced crosstie ； lap-spliced inner hoop ； RC columns ； seismic performance