Experimental investigation of using mechanical splices on the cyclic performance of RC columns. (April 2020)

• Record Type: Journal Article
• Authors: Kheyroddin, Ali; Mohammadkhah, Amirhossein; Dabiri, Hamed; Kaviani, Ahmad
• Is Part Of: Structures. Volume 24(2020)
• Page Start: 717
• Page End: 727
• Publication Date: 2020-04
• Subjects: RC column -- Mechanical splice -- Force–displacement hysteresis -- Ductility -- Absorbed energy -- Stiffness; Structural engineering -- Periodicals; 624.1
• DOI: 10.1016/j.istruc.2020.01.043
• Languages: English
• ISSNs: 2352-0124

Abstract

Highlights: Testing six RC columns: One reference column, one with overlap splice and four with mechanical splices. Considering overlap splice, threaded couplers and shear screw-threaded couplers. Investigating behavior of RC columns under cyclic and axial loads. Comparative evaluation in terms of elasticity, ductility, energy absorption and stiffness. Analyzing crack propagations and failure mechanism. Abstract: In this study, the influence of using mechanical splices on the cyclic performance of RC columns under axial and cyclic loads was investigated experimentally. Totally six specimens were fabricated and examined; the first one was fabricated by non-spliced reinforcement bars which was considered as reference specimen. Overlap splice in the middle of the column was used in the second specimen. Threaded mechanical splices were used for the all of the longitudinal bars at 50 mm above the column-foundation interface in the third column. The fourth column was fabricated the same as the third one but half of the couplers were staggered at 600 mm above the bottom couplers. The fifth and sixth specimens were fabricated similar to the third and fourth column but shear screw-threaded couplers were incorporated instead of threaded couplers. Force-displacement hysteresis loops were presented as the output and parameters including lateral load bearing capacity, ductility, absorbed energy and stiffness are considered and discussed. Based on the obtained results, it was concluded that mechanical splices can considerably affect cyclic behavior of RC columns.