Development of a Hybrid Mechanical Splice PC Joint and Static Structural Performance Evaluation of Segmental Precast Concrete Members

doi:10.15683/kosdi.2026.9.30.1008

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2026 Vol.22, Issue 3 Preview Page Next Page

Original Article

Development of a Hybrid Mechanical Splice PC Joint and Static Structural Performance Evaluation of Segmental Precast Concrete Members 복합 기계적 이음 방식 PC조인트의 개발 및 분절형 프리캐스트 콘크리트 부재의 정적 구조성능 평가: 이형훈¹ㆍ송동민²ㆍ김성겸³*
Hyung-Hoon Lee¹, Dong-Min Song², Seong-Kyum Kim³*; ¹Ph.D. Candidate, Department of Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
²Ph.D. Candidate, Department of Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
³Professor, Department of Civil Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea

30 September 2026. pp. 1008-1016

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Abstract

Purpose: This study develops a hybrid mechanical splice (PC Joint) that secures both stress continuity and erection-eccentricity tolerance at segmental joints of precast concrete members, and verifies its static structural performance. Method: Eight full-scale monolithic and segmental beams in two series (600×300×4,200mm and 600×400×6,500mm) were tested under four-point flexure, flexure-shear and pure shear. Result: The segmental specimens carried 1.0-7.1% higher peak loads than the monolithic ones, but their tensile reinforcement ratio was also 21-31% higher. On a normalized basis, their overstrength ratio was 1.40-1.68 against 1.52-1.85 for the monolithic specimens, about 7-10% lower. In pure shear the segmental specimen was 8.2% weaker, yet its strength reached 2.8 times the interface shear-transfer capacity given by the shear-friction provisions, with no sliding failure along the joint. Conclusion: Given this reinforcement difference, the higher peak loads cannot be attributed to the joint. The proposed splice does not enhance flexural capacity but keeps the joint-induced performance loss small relative to the design safety margin, so that segmental members behave comparably to monolithic ones in flexure and shear under static monotonic loading.

Keywords

Precast Concrete

Mechanical Splice

PC Joint

Stress Continuity

Segmental Member

Flexural Performance

Shear Friction

연구목적: 프리캐스트 콘크리트 분절 접합부에서 응력 연속성과 시공 편심 허용성을 동시에 확보하는 복합 기계적 이음 방식의 PC조인트를 개발하고 정적 구조성능을 검증하고자 한다. 연구방법: 600×300×4,200mm 및 600×400×6,500mm 두 계열의 일체형·분절형 실험체 8개에 대해 4점 재하 휨, 휨-전단, 접합부 순수전단 실험을 수행하였다. 연구결과: 분절형의 최대하중은 일체형보다 1.0~7.1% 높았으나 하부 주근 철근비도 21~31% 컸다. 철근량 차이를 배제한 초과강도비는 분절형 1.40~1.68, 일체형 1.52~1.85로 분절형이 약 7~10% 낮았다. 순수전단 강도는 분절형이 8.2% 낮았으나 전단마찰식에 의한 접합면 설계 전단강도의 2.8배에 달하였고, 접합면 미끄러짐 파괴는 관찰되지 않았다. 결론: 이러한 철근비 차이로 인해 최대하중의 절대값만으로는 조인트에 의한 성능 향상을 논할 수 없다. 제안된 이음은 휨 강도를 높이는 기술은 아니나 접합면 도입에 따른 성능 손실을 설계 안전여유에 비해 작은 수준으로 억제하여, 정적 단조 가력 하에서 분절형 부재가 일체 부재에 준하는 휨·전단 거동을 보이게 한다.

키워드

프리캐스트 콘크리트

기계적 이음

PC조인트

응력 연속성

분절 부재

휨 성능

전단마찰

References

ACI Committee 318 (2019). Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary. American Concrete Institute, ACI 318-19, Farmington Hills, MI, US.
Bompa, D.V., Elghazouli, A.Y. (2018). “Inelastic cyclic behaviour of RC members incorporating threaded reinforcement couplers.” Engineering Structures, Vol. 167, pp. 625-643.
Elliott, K.S. (2016). Precast Concrete Structures, 2nd ed. CRC Press, Boca Raton, FL, US.
Fédération internationale du béton. (2014). Precast Concrete Buildings. fib Bulletin 74, Federation Internationale du Beton, Lausanne, Switzerland.
Gibb, A.G.F., Isack, F. (2003). “Re-engineering through pre-assembly: Client expectations and drivers.” Building Research and Information, Vol. 31, No. 2, pp. 146-160. 10.1080/09613210302000
Han, K.-S., Yang, W.-J. (2008). “Flexure-shear behavior test of rigid precast concrete connections.” Journal of Korean Society of Steel Construction, Vol. 20, No. 5, pp. 651-661.
Korea Concrete Institute (2021). Concrete Design Code and Commentary (KCI 2021). Kimoondang, Seoul, Korea.
Lee, S.-H., Jeon, S.-H., Park, H. (2006). “Evaluation of structural performance of grouted sleeve splices.” Journal of the Korea Concrete Institute, Vol. 18, No. 5, pp. 641-649.
Lenton, A.R. (1989). “Mechanical splicing of reinforcing bars.” The Structural Engineer, Vol. 67, No. 19, pp. 359-363.
Ministry of Land, Infrastructure and Transport (2021). Design Code for Concrete Structures - Flexure and Compression (KDS 14 20 20). Sejong, Korea.
Park, S.-K., Jung, H.-S., Kang, W.-S. (2007). “Present status and development direction of precast concrete methods in domestic civil engineering.” Journal of the Korea Concrete Institute, Vol. 19, No. 4, pp. 441-450.
Priestley, M.J.N., Seible, F., Calvi, G.M. (1996). Seismic Design and Retrofit of Bridges. John Wiley & Sons, New York, US. 10.1002/9780470172858
Tullini, N., Minghini, F. (2016). “Grouted sleeve connections used in precast concrete structures: Bond strength assessment.” Engineering Structures, Vol. 122, pp. 187-196.
Yuan, H., Zhu, Z., Naito, C.J., Yi, W. (2017). “Tensile behavior of half grouted sleeve connections.” Construction and Building Materials, Vol. 152, pp. 96-104. 10.1016/j.conbuildmat.2017.06.154

Information

Publisher :The Korean Society of Disaster Information
Publisher(Ko) :한국재난정보학회
Journal Title :Journal of the Society of Disaster Information
Journal Title(Ko) :한국재난정보학회논문집
Volume : 22
No :3
Pages :1008-1016
DOI :https://doi.org/10.15683/kosdi.2026.9.30.1008

[1] ACI Committee 318 (2019). Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary. American Concrete Institute, ACI 318-19, Farmington Hills, MI, US.

[2] Bompa, D.V., Elghazouli, A.Y. (2018). “Inelastic cyclic behaviour of RC members incorporating threaded reinforcement couplers.” Engineering Structures, Vol. 167, pp. 625-643.

[3] Elliott, K.S. (2016). Precast Concrete Structures, 2nd ed. CRC Press, Boca Raton, FL, US.

[4] Fédération internationale du béton. (2014). Precast Concrete Buildings. fib Bulletin 74, Federation Internationale du Beton, Lausanne, Switzerland.

[5] Gibb, A.G.F., Isack, F. (2003). “Re-engineering through pre-assembly: Client expectations and drivers.” Building Research and Information, Vol. 31, No. 2, pp. 146-160. 10.1080/09613210302000

[6] Han, K.-S., Yang, W.-J. (2008). “Flexure-shear behavior test of rigid precast concrete connections.” Journal of Korean Society of Steel Construction, Vol. 20, No. 5, pp. 651-661.

[7] Korea Concrete Institute (2021). Concrete Design Code and Commentary (KCI 2021). Kimoondang, Seoul, Korea.

[8] Lee, S.-H., Jeon, S.-H., Park, H. (2006). “Evaluation of structural performance of grouted sleeve splices.” Journal of the Korea Concrete Institute, Vol. 18, No. 5, pp. 641-649.

[9] Lenton, A.R. (1989). “Mechanical splicing of reinforcing bars.” The Structural Engineer, Vol. 67, No. 19, pp. 359-363.

[10] Ministry of Land, Infrastructure and Transport (2021). Design Code for Concrete Structures - Flexure and Compression (KDS 14 20 20). Sejong, Korea.

[11] Park, S.-K., Jung, H.-S., Kang, W.-S. (2007). “Present status and development direction of precast concrete methods in domestic civil engineering.” Journal of the Korea Concrete Institute, Vol. 19, No. 4, pp. 441-450.

[12] Priestley, M.J.N., Seible, F., Calvi, G.M. (1996). Seismic Design and Retrofit of Bridges. John Wiley & Sons, New York, US. 10.1002/9780470172858

[13] Tullini, N., Minghini, F. (2016). “Grouted sleeve connections used in precast concrete structures: Bond strength assessment.” Engineering Structures, Vol. 122, pp. 187-196.

[14] Yuan, H., Zhu, Z., Naito, C.J., Yi, W. (2017). “Tensile behavior of half grouted sleeve connections.” Construction and Building Materials, Vol. 152, pp. 96-104. 10.1016/j.conbuildmat.2017.06.154

Journal of the Society of Disaster Information ISSN:1976-2208(Print) 2671-5287(Online) 한국재난정보학회논문집

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