Evaluating the Performance of Oversize Threaded Splices with Cyclic Loading Protocol:Experimental study
mohamad reza shokrzadeh
1
(Department of civil engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran)
Taleb Sadeghian
2
( Department of Earthquake Engineering, Shahid Ashrafi Esfahani University, Esfahan, Iran )
Fariborz Nateghi Allahe
3
(Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology, Tehran, Iran)
Keywords: Mechanical threaded splice, Ductile Members, Cold rolling, Modifying threaded,
Abstract :
This study aims to evaluate the performance of threaded splices utilizing the oversize method under cyclic loading conditions. Experimental tests were conducted on threaded couplers with enlarged thread diameters to investigate their strength, ductility, and energy absorption characteristics. The results revealed that the oversize-threaded splices exhibited enhanced performance, with reduced stress levels and minimal slippage observed during cyclic loading. The enlarged cross-sectional area near the threads contributed to improved ductility and energy absorption capacity. Moreover, the oversize splices demonstrated a higher ultimate tensile load capacity compared to conventional splices. These findings underscore the effectiveness of the oversize method in enhancing the performance of threaded splices under cyclic loading, rendering them suitable for applications in seismic regions. The outcomes of this study provide valuable insights for designing robust and resilient threaded splices in seismic-resistant structures, contributing to the advancement of construction practices in earthquake-prone areas. Keywords: Mechanical threaded splice, Ductile Members, Cold rolling, Modifying threaded
1] Nateghi-Alahi F, Shokrzadeh MR. Behavior considerations for mechanical rebar couplers. Behavior considerations for mechanical rebar couplers, University of Tokyo: 2019, p. 30–41.
[2] Shokrzadeh MR, Nateghi Allahe F, Mansoori , Mohammad Reza, Javadi P, Mansoori, MR, Javadi P. Failure area evaluation of the coupler with threaded bar: Experimental and Numerical study. International Journal of Advanced Structural Engineering 2022;12:531–43. https://doi.org/10.1007/IJASE.2022.692294.
[3] Shokrzadeh MR, Nateghi-Alahi F, Mansoori MR, Javadi P. The improvement of the threaded-based mechanical splice by modifying the threaded system: Study of techniques cold rolling and rotating friction welding. Journal of Building Engineering 2023;80:107964. https://doi.org/10.1016/J.JOBE.2023.107964.
[4] Shokrzadeh MR, Aziminejad A, Moghaddam AS. Evaluation of various FRP strengthening configurations for RC beam-column joints. Bridge Structures 2024;Preprint:1–21. https://doi.org/10.3233/BRS-240223.
[5] Shokrzadeh MR, Nateghi-Alahi F. Evaluation of hybrid NSM-CFRP technical bars and FRP sheets for seismic rehabilitation of a concrete bridge pier. Bridge Structures 2022;18:75–88. https://doi.org/10.3233/BRS-290180.
[6] Tazarv M, Shrestha G, Saiidi MS. State-of-the-art review and design of grouted duct connections for precast bridge columns. Structures 2021. https://doi.org/10.1016/j.istruc.2020.12.091.
[7] Dahal PK, Tazarv M. Mechanical bar splices for incorporation in plastic hinge regions of RC members. Construction and Building Materials 2020;258:120308. https://doi.org/10.1016/j.conbuildmat.2020.120308.
[8] shokrzadeh mohamad reza, Allahe FN, Sadeghian T. Cold rolling techniques in mechanical splices: Experimental investigations. International Journal of Advanced Structural Engineering Vol 5 0 2024;5:0. https://doi.org/10.30495/IJASE.2024.2005050.1087.
[9] Haroun MA, Elsanadedy HM. Fiber-Reinforced Plastic Jackets for Ductility Enhancement of Reinforced Concrete Bridge Columns with Poor Lap-Splice Detailing. Journal of Bridge Engineering 2005. https://doi.org/10.1061/(asce)1084-0702(2005)10:6(749).
[10] Dabiri H, Kheyroddin A, Dall’Asta A. Splice methods used for reinforcement steel bars: A state-of-the-art review. Construction and Building Materials 2022. https://doi.org/10.1016/j.conbuildmat.2021.126198.
[11] Kheyroddin A, Mohammadkhah A, Dabiri H, Kaviani A. Experimental investigation of using mechanical splices on the cyclic performance of RC columns. Structures 2020;24:717–27. https://doi.org/10.1016/j.istruc.2020.01.043.
[12] Han Q, Li X, Xu K, Lu Y, Du X, Wang Z. Shear strength and cracking mechanism of precast bridge columns with grouted sleeve connections. Engineering Structures 2021. https://doi.org/10.1016/j.engstruct.2020.111616.
[13] Shokrzadeh MR. Experimental study of seismic behavior and modification of the failure region of mechanical bar splices in reinforced concrete vertical elements. Islamic Azad University Science and Research Branch, 2024.
[14] Shokrzadeh MR, Nateghi-Alahi F. Experimental study of seismic behavior and modification of the failure region of mechanical bar splices. Sharif Journal of Civil Engineering 2025. https://doi.org/10.24200/J30.2024.63880.3292.
[15] Bompa D V., Elghazouli AY. Inelastic cyclic behaviour of RC members incorporating threaded reinforcement couplers. Engineering Structures 2019;180:468–83. https://doi.org/10.1016/j.engstruct.2018.11.053.
[16] Wu S, Li H, Wang X, Li R, Tian C, Hou Q. Seismic performance of a novel partial precast RC shear wall with reserved cast-in-place base and wall edges. Soil Dynamics and Earthquake Engineering 2022. https://doi.org/10.1016/j.soildyn.2021.107038.
[17] Departament of Transportation. Method of Tests for Mechanical and Welded Reinforcing Reinforcing Steel Splices 2013:1–5.
[18] ISO/DIS 15835. Steel for the Reinforcement of Concrete - Reinforcement Couplers for Mechanical Splices of Bars (Parts 1 to 3). International Organizationa for Standardization, Geneva, Switzerland; 2018. n.d.
[19] ASTM A1034/A1034M-10a. Standard Test Methods for Testing Mechanical Splices for Steel Reinforcing Bars. West Conshohocken, PA; 2015. 5 pp. n.d.
[20] Henin E, Morcous G. Non-proprietary bar splice sleeve for precast concrete construction. Engineering Structures 2015;83:154–62. https://doi.org/10.1016/j.engstruct.2014.10.045.
[21] Lin F, Wu X. Mechanical Performance and Stress–Strain Relationships for Grouted Splices Under Tensile and Cyclic Loadings. International Journal of Concrete Structures and Materials 2016;10:435–50. https://doi.org/10.1007/s40069-016-0156-5.
[22] Yuan H, Zhenggeng Z, Naito CJ, Weijian Y. Tensile behavior of half grouted sleeve connections: Experimental study and analytical modeling. Construction and Building Materials 2017;152:96–104. https://doi.org/10.1016/j.conbuildmat.2017.06.154.
[23] Liu H, Han Q, Bai Y, Xu C, Du X. Connection performance of restrained deformed grouted sleeve splice. Advances in Structural Engineering 2018;21:488–99. https://doi.org/10.1177/1369433217719987.
[24] Bompa D V., Elghazouli AY. Monotonic and cyclic performance of threaded reinforcement splices. Structures 2018;16:358–72. https://doi.org/10.1016/j.istruc.2018.11.009.
[25] ACI 318-19 Building Code Requirements for Structural Concrete and Commentary. 318-19 Building Code Requirements for Structural Concrete and Commentary 2019. https://doi.org/10.14359/51716937.
[26] Caltrans. Caltrans Seismic Design Criteria Version 1.7. California Department of Transportation: Sacramento, CA, US 2013.
[27] AASHTO. AASHTO LRFD Bridge Design Specifications, 9th Edition. 2020.
[28] European Commitee for Standardization. Eurocode 8: Design of structures for earthquake resistance - Part 1 : General rules, seismic actions and rules for buildings. European Committee for Standardization 2004.
[29] ACI Committee 318. Aci 318 - 19 Building Code Requirements for Structural Concrete and Commentary. 2019.
[30] Al-Jelawy HM. Experimental and numerical investigations on monotonic tensile behavior of grouted sleeve couplers with different splicing configurations. Engineering Structures 2022;265:114434. https://doi.org/10.1016/J.ENGSTRUCT.2022.114434.
[31] Tazarv M, Saiidi MS. Seismic design of bridge columns incorporating mechanical bar splices in plastic hinge regions. Engineering Structures 2016. https://doi.org/10.1016/j.engstruct.2016.06.041.
[32] Balazs GL. Cracking analysis based on slip and bond stresses. ACI Materials Journal 1993. https://doi.org/10.14359/3890.
[33] Lin H, Zhao Y, Feng P, Ye H, Ozbolt J, Jiang C, et al. State-of-the-art review on the bond properties of corroded reinforcing steel bar. Construction and Building Materials 2019. https://doi.org/10.1016/j.conbuildmat.2019.04.077.
[34] BS 1881-121. Testing Concrete - Part 121 : Method for determination of the compressive strength of concrete cores. 1983.
[35] ASTM Standard E8/E8M. Standard Test Methods for Tension Testing of Metallic Materials, ASTM International, West Conshohocken, PA, 2011. ASTM International 2016.
