| 1. |  | Yanuar Haryanto; Ay Lie Han; Hsuan-Teh Hu; Fu-Pei Hsiao; Banu Ardi Hidayat; Arnie Widyaningrum: Enhancement of flexural performance of RC beams with steel wire rope by external strengthening technique. In: Journal of the Chinese Institute of Engineers, 2021. (Type: Journal Article | Abstract | Links)@article{85,
title = {Enhancement of flexural performance of RC beams with steel wire rope by external strengthening technique},
author = {Yanuar Haryanto and Ay Lie Han and Hsuan-Teh Hu and Fu-Pei Hsiao and Banu Ardi Hidayat and Arnie Widyaningrum},
url = {https://www.tandfonline.com/doi/full/10.1080/02533839.2021.1871651},
doi = {https://doi.org/10.1080/02533839.2021.1871651},
year = {2021},
date = {2021-02-02},
journal = {Journal of the Chinese Institute of Engineers},
abstract = {Reinforced concrete structures around the world need repairing or strengthening at some stage in their lifetimes for different reasons. Steel wire rope is one of the potential materials to strengthen reinforced concrete structures do to its high strength, lightweight, and high flexibility properties. This research was, therefore, conducted to investigate a relatively new technique to strengthen reinforced concrete beams using external steel wire ropes. This involved testing five beam specimens under a four-point bending configuration for failure, and the strengthening effects of external wire ropes on their performance were also studied. The results showed the ultimate load capacity was also significantly enhanced up to 250% compared to the control specimen. Moreover, the stiffness and energy absorption capacity of the strengthened specimens were improved due to the external strengthening technique. This means reinforced concrete beams strengthened with external steel wire rope are capable of fulfilling the flexural performance required for reinforced concrete structures.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Reinforced concrete structures around the world need repairing or strengthening at some stage in their lifetimes for different reasons. Steel wire rope is one of the potential materials to strengthen reinforced concrete structures do to its high strength, lightweight, and high flexibility properties. This research was, therefore, conducted to investigate a relatively new technique to strengthen reinforced concrete beams using external steel wire ropes. This involved testing five beam specimens under a four-point bending configuration for failure, and the strengthening effects of external wire ropes on their performance were also studied. The results showed the ultimate load capacity was also significantly enhanced up to 250% compared to the control specimen. Moreover, the stiffness and energy absorption capacity of the strengthened specimens were improved due to the external strengthening technique. This means reinforced concrete beams strengthened with external steel wire rope are capable of fulfilling the flexural performance required for reinforced concrete structures. |
| 2. |  | Yanuar Haryanto; Nanang Gunawan Wariyatno; Hsuan-Teh Hu; Ay Lie Han; Banu Ardi Hidayat: Investigation on Structural Behaviour of Bamboo Reinforced Concrete Slabs under Concentrated Load. In: journal of Sains Malaysiana (SCI), 50 (1), pp. 227-238, 2021. (Type: Journal Article | Abstract | Links)@article{84,
title = {Investigation on Structural Behaviour of Bamboo Reinforced Concrete Slabs under Concentrated Load},
author = {Yanuar Haryanto and Nanang Gunawan Wariyatno and Hsuan-Teh Hu and Ay Lie Han and Banu Ardi Hidayat},
url = {http://www.ukm.my/jsm/pdf_files/SM-PDF-50-1-2021/22.pdf
},
doi = {http://dx.doi.org/10.17576/jsm-2021-5001-22},
year = {2021},
date = {2021-01-30},
journal = {journal of Sains Malaysiana (SCI)},
volume = {50},
number = {1},
pages = {227-238},
abstract = {Reinforced concrete is perhaps the most widely used building material in the world. However, the materials used
for reinforcement of concrete i.e. steel is quite expensive and scarcely available in the developing world. As a result,
bamboo is considered to be a cheaper replacement with high tensile strength. This research investigated the structural
behaviour of bamboo-reinforced concrete slabs used for footplate foundation subjected to concentrated load. For
this purpose, four different reinforced concrete slab panels were developed and analyzed. The influence of replacing
steel with bamboo for the reinforcement of concrete slabs on their structural behaviour was assessed by determining
the load-deflection characteristics, the ultimate load, the stiffness, the ductility, the cracking pattern, and the energy
absorption capacity. The results showed that in comparison to steel reinforced concrete slabs, the strength of 82% can
be acquired by the bamboo reinforced slabs. Furthermore, ductility demonstrated by the two types of specimens was
almost equivalent i.e. up to 93%. Those indicated that the structural behaviour demonstrated by bamboo reinforced
slabs is quite comparable to that of steel reinforced concrete slabs. Therefore, bamboo can prove to be a promising
substitute for steel in concrete reinforcement. Future studies may further examine this opportunity},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Reinforced concrete is perhaps the most widely used building material in the world. However, the materials used
for reinforcement of concrete i.e. steel is quite expensive and scarcely available in the developing world. As a result,
bamboo is considered to be a cheaper replacement with high tensile strength. This research investigated the structural
behaviour of bamboo-reinforced concrete slabs used for footplate foundation subjected to concentrated load. For
this purpose, four different reinforced concrete slab panels were developed and analyzed. The influence of replacing
steel with bamboo for the reinforcement of concrete slabs on their structural behaviour was assessed by determining
the load-deflection characteristics, the ultimate load, the stiffness, the ductility, the cracking pattern, and the energy
absorption capacity. The results showed that in comparison to steel reinforced concrete slabs, the strength of 82% can
be acquired by the bamboo reinforced slabs. Furthermore, ductility demonstrated by the two types of specimens was
almost equivalent i.e. up to 93%. Those indicated that the structural behaviour demonstrated by bamboo reinforced
slabs is quite comparable to that of steel reinforced concrete slabs. Therefore, bamboo can prove to be a promising
substitute for steel in concrete reinforcement. Future studies may further examine this opportunity |
| 3. |  | Agus Maryoto; Han Ay Lie; Hendrik Marius Jonkers: Flexural strength of concrete-galvalume composite beam under elevated temperatures. In: Computers and Concrete, 27 (1), pp. 13-20, 2020. (Type: Journal Article | Abstract | Links)@article{79b,
title = {Flexural strength of concrete-galvalume composite beam under elevated temperatures},
author = {Agus Maryoto and Han Ay Lie and Hendrik Marius Jonkers},
url = {http://www.techno-press.org/?page=container&journal=cac&volume=27&num=1},
year = {2020},
date = {2020-12-03},
journal = {Computers and Concrete},
volume = {27},
number = {1},
pages = {13-20},
abstract = {In this paper, the elevated temperature on a concrete-galvalume composite beam's flexural strength based on the numerical and experimental methods is investigated. The strategy is to perform modeling and simulation of the flexural test based on finite element method (FEM) at room temperature and validate its results by using experiments at the same temperature. With material constants and boundary conditions set-up provided from the validation, we model and simulate the same flexural tests for the composite at higher temperatures. The study concludes that the flexural strength of the beam decreases at higher temperature. Additionally, it was shown that cracking moments is very sensitive to the temperature fluctuation and the failure modes are sensitive with respect to the elevated temperature.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper, the elevated temperature on a concrete-galvalume composite beam's flexural strength based on the numerical and experimental methods is investigated. The strategy is to perform modeling and simulation of the flexural test based on finite element method (FEM) at room temperature and validate its results by using experiments at the same temperature. With material constants and boundary conditions set-up provided from the validation, we model and simulate the same flexural tests for the composite at higher temperatures. The study concludes that the flexural strength of the beam decreases at higher temperature. Additionally, it was shown that cracking moments is very sensitive to the temperature fluctuation and the failure modes are sensitive with respect to the elevated temperature. |
| 4. |  | Banu A. Hidayat; Hsuan-Teh Hu; Fu-Pei Hsiao; Ay Lie Han; Panapa Pita; Yanuar Haryanto
: Seismic performance of non-ductile detailing RC frames: An experimental investigation. In: Earthquakes and Structures, 19 (6), pp. 485-498, 2020. (Type: Journal Article | Abstract | Links)@article{79,
title = {Seismic performance of non-ductile detailing RC frames: An experimental investigation},
author = {Banu A. Hidayat and Hsuan-Teh Hu and Fu-Pei Hsiao and Ay Lie Han and Panapa Pita and Yanuar Haryanto
},
url = {http://www.techno-press.org/content/?page=article&journal=eas&volume=19&num=6&ordernum=6
http://dx.doi.org/10.12989/eas.2020.19.6.485},
year = {2020},
date = {2020-12-01},
journal = {Earthquakes and Structures},
volume = {19},
number = {6},
pages = {485-498},
abstract = {Non-ductile detailing of Reinforced Concrete (RC) frames may lead to structural failure when the structure is subjected to earthquake response. These designs are generally encountered in older RC frames constructed prior to the introduction of the ductility aspect. The failure observed in the beam–column joints (BCJs) and accompanied by excessive column damage. This work examines the seismic performance and failure mode of non-ductile designed RC columns and exterior BCJs. The design was based on the actual building in Tainan City, Taiwan, that collapsed due to the 2016 Meinong earthquake. Hence, an experimental investigation using cyclic testing was performed on two columns and two BCJ specimens scaled down to 50%. The experiment resulted in a poor response in both specimens. Excessive cracks and their propagation due to the incursion of the lateral loads could be observed close to the top and bottom of the specimens. Joint shear failure appeared in the joints. The ductility of the member was below the desired value of 4. This is the minimum number required to survive an earthquake with a similar magnitude to that of El Centro. The evidence provides an understanding of the seismic failure of poorly detailed RC frame structures.
},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Non-ductile detailing of Reinforced Concrete (RC) frames may lead to structural failure when the structure is subjected to earthquake response. These designs are generally encountered in older RC frames constructed prior to the introduction of the ductility aspect. The failure observed in the beam–column joints (BCJs) and accompanied by excessive column damage. This work examines the seismic performance and failure mode of non-ductile designed RC columns and exterior BCJs. The design was based on the actual building in Tainan City, Taiwan, that collapsed due to the 2016 Meinong earthquake. Hence, an experimental investigation using cyclic testing was performed on two columns and two BCJ specimens scaled down to 50%. The experiment resulted in a poor response in both specimens. Excessive cracks and their propagation due to the incursion of the lateral loads could be observed close to the top and bottom of the specimens. Joint shear failure appeared in the joints. The ductility of the member was below the desired value of 4. This is the minimum number required to survive an earthquake with a similar magnitude to that of El Centro. The evidence provides an understanding of the seismic failure of poorly detailed RC frame structures.
|
| 5. |  | Bagus Hario Setiadji; Hariadi Dewabrata; Han Ay Lie; Sie Alexander P. : Studi Penggunaan Semen Slag sebagai Substitusi Semen Portland pada Beton. In: Jurnal Teknik Sipil Siklus, 6 (2), pp. 117 - 128, 2020, ISSN: 2549- 3973. (Type: Journal Article | Abstract | Links)@article{81,
title = {Studi Penggunaan Semen Slag sebagai Substitusi Semen Portland pada Beton},
author = {Bagus Hario Setiadji and Hariadi Dewabrata and Han Ay Lie and Sie Alexander P. },
url = {https://journal.unilak.ac.id/index.php/SIKLUS/article/view/4595
https://doi.org/10.31849/siklus.v6i2.4595},
issn = {2549- 3973},
year = {2020},
date = {2020-10-01},
journal = {Jurnal Teknik Sipil Siklus},
volume = {6},
number = {2},
pages = {117 - 128},
abstract = {Era kini ditandai dengan penekanan pada konsevasi energi, beton ramah lingkungan dan beton hijau. Semen merupakan bahan utama pembentuk beton, dan juga penyumbang pencemaran udara terbesar di antara bahan penyusun material tersebut. Semen slag atau Ground Granulated Blast Furnace Slag (GGBFS) yang merupakan hasil pengolahan limbah industri baja menjadi salah satu alternatif yang diminati karena proses produksi dan lebih ekonomis bila dibandingkan dengan Portland Cement (PC). Material yang mempunyai sifat cementitious ini berpotensi untuk menggantikan sebagian semen dalam campuran beton dengan tetap mempertahankan kelebihan sifat mekanis beton. Penelitian ini dilakukan di laboratorium dengan pengujian benda uji yang telah didesain dengan komposisi substitusi semen slag sebesar 0%, 10%, 20%, 30%, 40%, dan 50% dari berat semen yang dibutuhkan dan pada umur 28 hari. Sebagai benda uji kontrol beton direncanakan dengan kuat tekan f’c = 38 MPa. Semen slag yang digunakan berdasarkan referensi memiliki activity index grade 80. Penelitian dilakukan untuk mengetahui kinerja semen slag pada beton melalui pengamatan kuat tekan (f’c), hubungan tegangan-regangan (fc - ε) dan modulus elastisitas (E) beton. Pengujian menunjukkan bahwa substitusi slag menyebabkan terjadinya penurunan kuat tekan beton, regangan dan modulus elastisitas pada umur 28 hari karena adanya proses kimia yang lebih lamban daripada PC.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Era kini ditandai dengan penekanan pada konsevasi energi, beton ramah lingkungan dan beton hijau. Semen merupakan bahan utama pembentuk beton, dan juga penyumbang pencemaran udara terbesar di antara bahan penyusun material tersebut. Semen slag atau Ground Granulated Blast Furnace Slag (GGBFS) yang merupakan hasil pengolahan limbah industri baja menjadi salah satu alternatif yang diminati karena proses produksi dan lebih ekonomis bila dibandingkan dengan Portland Cement (PC). Material yang mempunyai sifat cementitious ini berpotensi untuk menggantikan sebagian semen dalam campuran beton dengan tetap mempertahankan kelebihan sifat mekanis beton. Penelitian ini dilakukan di laboratorium dengan pengujian benda uji yang telah didesain dengan komposisi substitusi semen slag sebesar 0%, 10%, 20%, 30%, 40%, dan 50% dari berat semen yang dibutuhkan dan pada umur 28 hari. Sebagai benda uji kontrol beton direncanakan dengan kuat tekan f’c = 38 MPa. Semen slag yang digunakan berdasarkan referensi memiliki activity index grade 80. Penelitian dilakukan untuk mengetahui kinerja semen slag pada beton melalui pengamatan kuat tekan (f’c), hubungan tegangan-regangan (fc - ε) dan modulus elastisitas (E) beton. Pengujian menunjukkan bahwa substitusi slag menyebabkan terjadinya penurunan kuat tekan beton, regangan dan modulus elastisitas pada umur 28 hari karena adanya proses kimia yang lebih lamban daripada PC. |
