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FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE COUPLING BEAMS Boediono, Bambang; Dewi, Nyoman Triani Herlina; Lim, Erwin
Journal of Engineering and Technological Sciences Vol 51, No 6 (2019)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2019.51.6.2

The use of reinforced concrete coupling beams in high-rise buildings is popular, especially in seismic prone areas. The modeling of a reinforced concrete coupling beam in a commercial structural analysis software is usually simplified to a line element or a compound of concrete and steel rebar as fiber element. Hence, the analysis of the simplified model cannot capture the overall hysteretic behavior of the element. Moreover, the simplified model is also limited in its capacity to estimate the shear strength contributed by the concrete and diagonal bars, if any, respectively. This study used an advanced finite element analysis package to simulate the cyclic behavior of four coupling beam specimens available in the database. The results show that the hysteretic loop predicted by the finite element analysis tends to overestimate the maximum lateral load capacity. On the other hand, analytical evaluation of the shear strength contributed by concrete and diagonal bars showed good agreement with the test results.

Finite Element Analysis of Reinforced Concrete Coupling Beams Bambang Boediono; Nyoman Triani Herlina Dewi; Erwin Lim
Journal of Engineering and Technological Sciences Vol. 51 No. 6 (2019)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2019.51.6.2

The use of reinforced concrete coupling beams in high-rise buildings is popular, especially in seismic prone areas. The modeling of a reinforced concrete coupling beam in a commercial structural analysis software is usually simplified to a line element or a compound of concrete and steel rebar as fiber element. Hence, the analysis of the simplified model cannot capture the overall hysteretic behavior of the element. Moreover, the simplified model is also limited in its capacity to estimate the shear strength contributed by the concrete and diagonal bars, if any, respectively. This study used an advanced finite element analysis package to simulate the cyclic behavior of four coupling beam specimens available in the database. The results show that the hysteretic loop predicted by the finite element analysis tends to overestimate the maximum lateral load capacity. On the other hand, analytical evaluation of the shear strength contributed by concrete and diagonal bars showed good agreement with the test results.

Seismic Behavior of Concrete-Filled Steel Tube (CFST) Column and Reinforced Concrete (RC) Beam Connections under Reversed Cyclic Loading Ahmed Najm Abdullah; Bambang Budiono; Herlien Dwiarti Setio; Erwin Lim
Journal of Engineering and Technological Sciences Vol. 53 No. 3 (2021)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2021.53.3.1

Previous studies on the connection between concrete-filled steel tube (CFST) columns and reinforced concrete (RC) beams have shown a loss of joint confinement because the steel tube was completely or partially cut in the joint area. This research presents a new connection system that provides joint confinement through a continuous steel tube. Potential sliding shear at the smooth interface between the columns and beams in the joint face is mitigated using two mechanisms: (i) shear connectors and (ii) longitudinal web beam reinforcement. This study tested two CFST column and RC beam joints to 4.5% drift ratio under combined compression axial load and lateral cyclic load. The experimental results revealed no cracks at the joint zone and the specimens satisfied the ACI 374.1-05 criteria, despite minor sliding at the beam-column interface. The finite element (FE) model showed good agreement with the experimental results.

Kinerja Struktur Sistem Tunggal dan Ganda dengan Performance Based Design Siti Aisyah Nurjannah; Hanafiah; Wanda Lestari; Erwin Lim; Iswandi Imran
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol 8 No 2 (2019): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

The structure of a simple rental apartment building of the Sumatran Technology Institute had been modeled using the Performance Based Design method. The aim of this study was to obtain the base shear and maximum displacement as well as the performance level of the building structure models in resisting the combination of gravitation and lateral earthquake loads. The loads were based on the function and location of the building. The building structures had been designed as a double system, namely the beam-column frames and shear walls in the direction of the XZ and YZ axis. There were four models: the models with a double system according to the original design, the beam-column frames without XZ shear walls, the beam-column frames without YZ shear walls, and the beam-column frames without shear walls. The results of the analysis at the performance level showed that the model with a double system was able to resist the highest base shear while the frames system without shear walls was only able to resist the lowest base shear compared to other models. The inter story drift under earthquake loads in the direction of the X and Y axis showed that all models of structural system were still within the safe limit.

Analytical Investigation of the Applicability of Seismic Devices for Core Frames System in High-Rise Buildings Dyah Kusumastuti; Muslinang Moestopo; Mega Suci Ramadhita; Erwin Lim; Randy Tanderan; Undagi Kausar Akbar
IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017
Publisher : Institut Teknologi Sepuluh Nopember

The use of link element in high rise buildings has been applied widely and proven to be effective in the eccentric braced frame system. Latest research has also shown that the applicability of link element can be extended to other type of structural systems, such as: coupled wall system or structures with core wall. The research showed that the use of link element could lead to better deformation capacity of the system and the link elements could act as a “fuse” to limit the input of earthquake force. However, the improvement of the seismic behavior may not be effective for any type of structural system. This paper investigates analytically parameters affecting the effectiveness of the application of shear link elements within a structural system. Several parameters being studied are the relative stiffness between link element and structural stiffness, types of structural configuration, etc.

EVALUASI KINERJA PILAR JEMBATAN LEMAH IRENG II BERDASARKAN PERFORMANCE BASED SEISMIC DESIGN Farah Amrina; Muhammad Riyansyah; Aris Aryanto; Erwin Lim
TEKNISIA Vol 28 No 1 (2023): Teknisia
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol28.iss1.art1

Lemah Ireng II Bridge is a type of box girder balance cantilever bridge located in Semarang Regency, Central Java, which was completed in 2014. The renewal of bridge loading regulations in 2016 consisted of SNI 1725:2016 for standard load and SNI 2833:2016 for earthquake load. Changes in earthquake loading regulations resulted in an increase in the ground surface spectra value in the short period (Sds, T=0,2 second) in the longitudinal direction by 38.47% and in the transverse direction by 45.39% as a result of updating the earthquake map and the earthquake response modification factor. To determine the level of bridge performance against the applicable earthquake regulations based on the pier structure parameters, the Non-Linear Time History Analysis (NLTHA) method is used. The NLTHA method uses seven deaggregated ground motion records which aim to represent the ground motions that occur at the bridge site. Parameter limits at the pier to determined performance level of bridge based on NCHRP Synthesis 440 and NCHRP Research Report 949. According to the results of performance-based analysis, the bridge pier structure meets the Fully Operational performance level based on the parameters of drift, compressive strain of concrete and tensile strain of steel reinforcement. At this level of performance, after an earthquake the structure suffers very little damage so no repairs are needed and the bridge can function immediately after the earthquake.

Perancangan Struktur Sistem Rangka Bresing Tahan Tekuk - Studi Kasus Pada Bangunan Esensial Gelasius Galvindy; Erwin Lim
Jurnal Teknik Sipil Vol 30 No 2 (2023): Jurnal Teknik Sipil
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2023.30.2.9

Abstrak Perancangan struktur dengan menggunakan Sistem Rangka Bresing Tahan Tekuk (SRBTT) belum lazim ditemukan di Indonesia, namun jenis struktur ini dapat banyak ditemukan di negara lainnya seperti Amerika Serikat, Jepang, dan Taiwan. Jenis struktur ini memiliki beberapa kelebihan dibanding jenis struktur lainnya, sebagai contoh apabila bresing mengalami kerusakan akibat beban gempa, elemen bresing dapat diganti dengan yang baru sehingga tidak memerlukan renovasi struktur secara keseluruhan. Selain itu, sistem struktur ini juga menghasilkan simpangan struktur yang relatif lebih kecil dibandingkan dengan sistem struktur lainnya, sehingga kerugian akibat kerusakan dapat berkurang. Makalah ini membahas contoh perancangan suatu bangunan esensial (kategori risiko IV) hipotetikal setinggi tiga lantai yang terletak di zona gempat tinggi dengan menggunakan Sistem Rangka Bresing Tahan Tekuk (SRBTT). Konsep utama dari perancangan sistem tersebut adalah kontrol terhadap hirarki keruntuhan, dimana elemen struktur lainnya tidak boleh mengalami leleh sebelum bresing tahan tekuk mengalami leleh. Berdasarkan analisa pushover, didapatkan bahwa struktur yang dirancang berada dalam tahap damage control dan masih di bawah batasan target kinerja life safety, menandakan tingkat kerusakan yang lebih rendah dan masih dapat diperbaiki setelah gempa besar terjadi. Kata-kata Kunci: Perancangan Struktur; Beban Gempa; Sistem Rangka Bresing Tahan Tekuk; Analisa Mekanisme Plastik

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