Cold rolling techniques in mechanical splices: Experimental investigations

International Journal of Advanced Structural Engineering

مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 04 بهمن 1402

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/ijase.2024.2005050.1087

نویسندگان

mohamad reza shokrzadeh^{* 1}؛ Fariborz Nateghi Allahe²؛ taleb sadeghian³

¹Department of civil engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran

²Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology, Tehran, Iran

³Department of Earthquake Engineering, Shahid Ashrafi Esfahani University, Esfahan, Iran

چکیده

The problem of overcrowding at the junction of the rebars is very significant, particularly for seismic details. Mechanical couplers can thus offer an appealing solution that eliminates the disadvantages of traditional reinforcement splicing. In this study, by modifying the method of making a threaded splice, one type of patch is introduced that can be used in the plastic hinge areas of ductile members in seismic areas. The splice area in the suggested method is oversized. To enlarge the splice area, the technique of cold rolling is used. In total, 72 samples (including three repeated samples of each type) were tested. Threaded couplers (TC), oversize-threaded couplers (OTC), and non-spliced reference specimens underwent uniaxial tensile and cyclic testing with and without concrete (NS). The sensitivity to bar diameter, as well as bar strength, ductility, energy absorption, and failure mode performance, were evaluated. In terms of strength, ductility, energy absorption, and failure mode, OTC performed the best and is suited for usage in high seismic zones. Additionally, the TC is appropriate for use in low-to-medium seismic zones.

کلیدواژه‌ها

Mechanical threaded splice؛ Ductile Members؛ Cold rolling؛ Modifying threaded