Pengaruh Panjang Tonjolan Pada Bangunan Bertingkat Beton Bertulang Model L

Fauzi, Firdaus Zamroni (2022) Pengaruh Panjang Tonjolan Pada Bangunan Bertingkat Beton Bertulang Model L. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Variasi dalam denah struktur bangunan seperti adanya tonjolan dapat mempengaruhi respons struktur akibat gaya gempa. Didalam peraturan dipersyaratkan bahwa untuk bangunan beraturan panjang tonjolan tidak boleh melebihi dari 25% dari ukuran terbesar denah struktur gedung dalam arah tonjolan tersebut. Struktur bangunan dengan penambahan tonjolan harus dapat direncanakan dengan baik seperti halnya pada bangunan bentuk L. Jika terjadi gempa, maka bangunan tersebut akan mengalami deformasi lebih besar. Dalam penelitian ini dilakukan peninjauan pengaruh akibat penambahan panjang tonjolan pada struktur gedung model L dengan variasi persentase penambahan sebesar 15% (model B), 20% (model C), 25% (model D), dan 30% (model E) pada bangunan dengan bentuk L yang dibandingkan pada bangunan tanpa tonjolan (model A) tujuannya untuk menganalisis pengaruhnya yang ditinjau dari eksentrisitas, base shear, displacement, drift, ketidakberaturan struktur, torsi bangunan dan defleksi yang terjadi pada struktur. Analisis dilakukan dengan program bantu ETABS untuk mempermudah analisis struktur, dari hasil analisis yang telah dilakukan penambahan tonjolan pada bangunan memiliki beberapa dampak positif dan negatif. Jika penelitian lainnya terkait penambahan tonjolan menunjukkan bahwa semakin bertambahnya tonjolan maka peninjauan pengaruh pada tujuan diatas akan juga semakin membesar hal itu dikarenakan distribusi massa yang simetris pada setiap lantai serta dalam penerapannya tidak menggunakan sarana dan prasarana seperti lift dan tangga. Hasil penelitian menunjukkan bahwa semakin besar penambahan tonjolan maka eksentrisitas yang terjadi pada model A sampai model E dalam arah X mengalami penurunan, sedangkan untuk arah Y mengalami kenaikan. Base shear yang terjadi mengalami kenaikan seiring dengan penambahan tonjolan. Displacement dan drift yang terjadi dari model A ke model B mengalami penurunan, kemudian dari model B sampai model E mengalami kenaikan. Ketidakberaturan torsi terdapat disemua model bangunan. Torsi bangunan yang terjadi pada model A sampai model E arah X mengalami kenaikan dan arah Y mengalami penurunan. Defleksi yang terjadi pada balok memiliki selisih yang berdekatan sehingga rasio tulangan terbesar pada balok dimiliki oleh bangunan model A yang kemudian diikuti oleh model E, D, C, B. Sedangkan hasil rasio tulangan kolom memiliki nilai yang sama dikarenakan dengan rasio tulangan minimum ternyata kolom masih bisa menahan gaya yang terjadi pada semua model bangunan. Plat yang mengalami peningkatan adalah plat di area tonjolan sehingga rasio tulangan model B, C dan D sama dan pada model E mengalami peningkatan.
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Variations in the structural plan of the building such as the presence of protrusions can affect the response of the structure due to earthquake forces. In the regulation it is required that for regular buildings the length of the protrusion should not exceed 25% of the largest size of the building structure plan in the direction of the protrusion. The structure of the building with the addition of protrusions must be well planned as is the case with L-shaped buildings. If an earthquake occurs, the building will experience greater deformation. In this study, a review of the effect due to the addition of the length of the protrusion on the structure of the L model building was carried out with variations in the percentage addition of 15% (model B), 20% (model C), 25% (model D), and 30% (model E) in the building. with an L shape compared to a building without protrusions (model A) the aim is to analyze its effect in terms of eccentricity, base shear, displacement, drift, structural irregularity, building torque and deflection that occurs in the structure. The analysis was carried out with the ETABS program to facilitate structural analysis, from the results of the analysis that the addition of protrusions to the building had several positive and negative impacts. If other research related to the addition of protrusions shows that the increase in protrusions, the review of the effects on the above objectives will also increase, this is due to the symmetrical distribution of mass on each floor and in its application it does not use facilities and infrastructure such as elevators and stairs. The results showed that the greater the addition of the bulge, the eccentricity that occurred in models A to E in the X direction decreased, while for the Y direction it increased. The base shear that occurs increases with the addition of protrusions. Displacement and drift that occurred from model A to model B decreased, then from model B to model E increased. Torsion irregularities exist in all building models. The building torque that occurs in model A to model E in the X direction increases and the Y direction decreases. The deflection that occurs in the beam has an adjacent difference so that the largest reinforcement ratio in the beam is owned by the model A building which is then followed by the model E, D, C, B. While the results of the column reinforcement ratio have the same value because with the minimum reinforcement ratio it turns out that the column is still can withstand the forces that occur in all building models. The plate that has increased is the plate in the protrusion area so that the ratio of reinforcement in models B, C and D is the same and in model E it increases.

Item Type: Thesis (Diploma)
Additional Information: RSIS 693.54 Fau p-1 2022
Uncontrolled Keywords: Panjang Tonjolan, Bangunan Bentuk L, Eksentrisitas. Length Protrusion, L-Shape Building, Eccentricity.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User: Mr. Marsudiyana -
Date Deposited: 14 Jul 2026 03:44
Last Modified: 14 Jul 2026 03:44
URI: http://repository.its.ac.id/id/eprint/134883

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