Confinement hoops of compression zone in beam under cyclic loading

Priastiwi, Yulita Arni; Imran, Iswandi; Nuroji,; Hidayat, Arif

doi:10.1063/1.5011489

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…Pemberian confinement crossties yang menempel di sengkang penahan geser mampu menambah tekanan pengekang dalam arah transversal dan berkontribusi dalam meningkatkan daktilitas dari balok. Kondisi yang sama juga terjadi pada spesimen balok yang diberikan tambahan confinement berbentuk persegi/hoops (Priastiwi et al, 2017) Bayrak & Sheikh (1998).…”

Section: Gambar 1 Detail Crosstiesunclassified

“…Penelitian mengenai confinement pada balok hingga saat ini masih sangat terbatas dibandingkan penelitian pengekangan pada kolom. Beberapa bentuk pengekang pada balok, khususnya di zona tekan penampang balok yang telah dikembangkan oleh peneliti terdahulu diantaranya adalah bentuk spiral (Base, 1962;Base & Read, 1965;Leung & Burgoyne, 2005, Hadi & Schimdt, 2002, Whitehead & Ibell, 2004, Hadi & Elbasha, 2007, serta Tee et al, 2017 serta bentuk persegi (Ziara et al, 1995;Delalibera & Giongo, 2008;Priastiwi et al, 2014, Priastiwi & Imran, 2015, Priastiwi et al, 2017. Bentuk spiral dan persegi sebagai confinement yang telah diteliti sebelumnya menunjukkan adanya kontribusi positif dari confinement di zona tekan balok terutama dalam hal daktilitas, namun demikian kedua bentuk confinement tersebut rumit dalam fabrikasi dan pembuatan secara manual terutama untuk bentuk spiral.…”

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“…Penelitian dengan crossties pernah juga dilakukan oleh Sakai & Sheikh (1989) dan juga Moehle & Cavanagh (1985) namun dilakukan pada kolom. Penelitian mengenai confinement di zona tekan penampang balok ini merupakan satu rangkaian dengan penelitian sebelumnya (Priastiwi et al, 2017) dan (Priastiwi & Imran, 2015) yang memasang confinement berupa persegi (hoops) di daerah zona tekan penampang balok di daerah sendi plastis balok. Pemberian confinement di zona tekan penampang balok dimaksudkan untuk memperoleh daktilitas lebih tinggi terutama di daerah sendi plastis balok saat mengalami beban bolak-balik seperti beban gempa Bentuk crossties sendiri dipilih karena bentuk ini lebih mudah didesain dan difabrikasi, sehingga diharapkan akan mudah pula untuk diterapkan pemakaiannya secara umum.…”

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Pengekang Crossties di Zona Tekan Balok dengan Pembebanan Siklik

Priastiwi

Imran

Nuroji

et al. 2019

MKTS

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Crossties that was installed as a confinement in the compression zone of the beam is proven can increase the ductility, especially when receiving the earthquake load. Using an experimental study, this paper explains the effect of crossties which was installed in compression zone of the beam. The model was a simplification of the plastic hinge of the beam. The beam was enlarged in the center of the span and would be loaded with a cyclic of point load, so as to produced the largest moment and shear fields in the face beam of the column. Moreover, the loading was provided by the displacement control system to achieve the ultimate condition. The results show that the crossties significantly increases the displacement and curvature ductility of the beams of 58.7% and 78.2%, respectively, compared to the beam without confinement. In addition, the load cycle formed by cyclic loading increases to 43 cycles in beam with crossties, meanwhile the beam without confinement can only survive up to 33 cycles. The crossties could also increase the cumulative value of inelastic displacement that occurs up to 98%, whereas its energy dissipation value is six times than the beam without confinement. On the other hand, the maximum load and capacity moment only increase about 6.5%.

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Section: Gambar 1 Detail Crosstiesunclassified

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Pengekang Crossties di Zona Tekan Balok dengan Pembebanan Siklik

Priastiwi

Imran

Nuroji

et al. 2019

MKTS

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Energy dissipation of graded concrete beams on maximum reinforcement ratio

Novitasari

Pratama

2021

IOP Conf. Ser.: Earth Environ. Sci.

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Energy dissipation is a parameter that contributes to the deformation process of structural elements. Factors affecting the value of energy dissipation include concrete compressive strength, reinforcement ratio, cross-sectional dimensions, and history of loading that occurs on the structure. In this study, the graded concrete (GC) beams with a maximum reinforcement design was tested under flexural test to analyse the resulting energy dissipation. The resulting data was then compared to the reference beams. The results showed that: 1) The use of cross-sectional dimension ratio of ½ in GC beams using maximum reinforcement can increase the energy dissipation by more than 2000%; 2) Design of reinforcement area should be based on the higher concrete strength to increase energy dissipation up to 100%; 3) The use of GC save on construction costs can increase energy dissipation by up to 400% with a reduction in load capacity of 25%; 4) The use of GC to improve the properties of structural elements can increase energy dissipation by more than 60% while increasing load performance by almost 50%.

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Confinement hoops of compression zone in beam under cyclic loading

Cited by 2 publications

References 3 publications

Pengekang Crossties di Zona Tekan Balok dengan Pembebanan Siklik

Pengekang Crossties di Zona Tekan Balok dengan Pembebanan Siklik

Energy dissipation of graded concrete beams on maximum reinforcement ratio

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