Studi Numerik Sambungan Spun Pile Terhadap Pile Cap Dengan Dan Tanpa Beton Pengisi Akibat Pembebanan Siklik

Vania Callista; Yuskar Lase; Widjojo Adi Prakoso; Mulia Orientilize

doi:10.29103/tj.v12i1.681

Studi Numerik Sambungan Spun Pile Terhadap Pile Cap Dengan Dan Tanpa Beton Pengisi Akibat Pembebanan Siklik

Vania Callista, Yuskar Lase, Widjojo Adi Prakoso, Mulia Orientilize

Abstract

Abstrak

Berdasarkan SNI 8460, spun pile sebagai struktur bawah didesain belum menggunakan konsep performance-based design (PBD) karena pertimbangan sulitnya proses perbaikan, meskipun PBD sudah diperbolehkan di negara lain. Peta gempa tahun 2017 menunjukkan adanya peningkatan seismic demand di Indonesia yang menyebabkan desain fondasi yang tidak efisien jika perilaku inelastic pada pondasi akibat gempa besar tidak diperbolehkan. Untuk mempelajari perilaku inelastic pondasi, tiga sambungan spun pile berukuran full scale diuji dengan pembebanan siklik horizontal. Analisis lanjutan dengan finite element (FE) dilakukan menggunakan Abaqus. Karena kurangnya jumlah tulangan geser (spiral) pada spun pile yang ada di Indonesia, efek confinement dari pemodelan tulangan spiral dibandingkan dengan pemodelan jika spiral disederhanakan sebagai hoops. Analisis FE juga dilakukan untuk mempelajari perbandingan perilaku antara spun pile kosong dan dengan beton pengisi dalam hal kekuatan, daktilitas dan performance levels dari sambungan spun pile.

Kata kunci: sambungan spun pile, performance-based design, the effect of concrete infill, daktilitas

Abstract

According to SNI 8640, spun pile as part of lower structure is not designed with the concept of performance-based design (PBD) because of repair issues, although PBD has been allowed for lower structures in other countries. According to the 2017 seismic zone, the increasing seismic demand in Indonesia results in an inefficient foundation design if inelastic behavior of foundation due to a big earthquake is not allowed. Three full scales of spun pile connections were tested with lateral cyclic loading to explore the inelastic behavior of foundation. A finite element (FE) analysis using Abaqus was conducted for further study. Due to low number of spun pile’s shear reinforcement (spiral) produced in Indonesia, the confinement effect of spiral model is compared with hoops model. Finite element analysis was also done to investigate the behavior difference of hollow spun pile and spun pile with concrete infill in terms of strength, ductility, and performance levels of spun pile’s connection.

Keywords: spun pile connection, performance-based design, the effect of concrete infill, ductility

Keywords

spun pile connection, performance-based design, the effect of concrete infill, ductility

Full Text:

PDF

References

ACI Committee 374, 2013. Guide for testing reinforced concrete structural elements under slowly applied simulated seismic loads. American Concrete Institute, Farmington Hills, MI.

American Association of State Highway and Transportation Officials (Ed.), 2011. AASHTO guide specifications for LRFD seismic bridge design, 2nd ed. ed. American Association of State Highway and Transportation Officials, Washington, DC.

American Society of Civil Engineers, 2017. Seismic Evaluation and Retrofit of Existing Buildings, 41st ed. American Society of Civil Engineers, Reston, VA. https://doi.org/10.1061/9780784414859

American Society of Civil Engineers, 2014. Seismic Design of Piers and Wharves, 61st ed. American Society of Civil Engineers, Reston, VA. https://doi.org/10.1061/9780784413487

Badan Standarisasi Nasional, 2017. SNI 8460:2017 Persyaratan Perancangan Geoteknik. Badan Standarisasi Nasional.

Bang, Jin-Wook, Oh, Sang-Jin, 이승수, Kim, Yun-Yung, 2016. Pile-cap Connection Behavior Dependent on the Connecting Method between PHC pile and Footing. J. Korea Inst. Struct. Maint. Insp. 20, 25–32. https://doi.org/10.11112/JKSMI.2016.20.3.025

Guo, Z., He, W., Bai, X., Chen, Y.F., 2017. Seismic Performance of Pile-Cap Connections of Prestressed High-Strength Concrete Pile with Different Details. Struct. Eng. Int. 27, 546–557. https://doi.org/10.2749/222137917X14881937845963

Irawan, C., Putu Raka, I.G., Djamaluddin, R., Faimun, F., Suprobo, P., Soeprapto, G., 2017. Ductility and Seismic Performance of Spun Pile Under Constant Axial and Reverse Flexural Loading. Proc. Int. Symp. Concr. Technol.

Japan Road Association, 2012. Spesifications for Highway Bridges - Part V Seismic Design. Japan Road Association.

Orientilize, M., Prakoso, W.A., Fadel, M., Fernaldy, R.P., 2021. Study of spun pile connection with steel jacket strengthening. IOP Conf. Ser. Earth Environ. Sci. 622, 012028. https://doi.org/10.1088/1755-1315/622/1/012028

Park, R., 1988. Ductility Evaluation from Laboratory and Analytical Testing. Proc. Ninth World Conf. Earthq. Eng. VIII, 605–616.

Setiawan, A.F., Darmawan, M.F., Ismanti, S., Mukhlis, S., Guntara Muria, A., 2020. Numerical model for investigating seismic performance of Prestressed Hollow Concrete (PHC) piles with Fiber section element. E3S Web Conf. 156, 03007. https://doi.org/10.1051/e3sconf/202015603007

Wang, T., Yang, Z., Zhao, H., Wang, W., 2014. Seismic Performance of Prestressed High Strength Concrete Pile to Pile Cap Connections. Adv. Struct. Eng. 17, 1329–1342. https://doi.org/10.1260/1369-4332.17.9.1329

DOI: http://dx.doi.org/10.29103/tj.v12i1.681