Studi Komparasi Modifikasi Struktur Tower Aubrey Apartemen Grand Shamaya Surabaya Antara Metode Tumpuan Jepit dan Interaksi Tanah Struktur

Siputra, Vincent Hans (2024) Studi Komparasi Modifikasi Struktur Tower Aubrey Apartemen Grand Shamaya Surabaya Antara Metode Tumpuan Jepit dan Interaksi Tanah Struktur. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pada umumnya, pengaruh dari tanah akan diabaikan dalam pemodelan. Struktur atas dan struktur bawah dari bangunan dimodelkan dan dianalisis secara terpisah. Pada pemodelan struktur atas, tanah dianggap memiliki kekakuan yang tak berhingga, sehingga diasumsikan terjepit pada bagian dasarnya. Pendekatan tersebut bisa saja memberikan hasil respons struktur yang tidak realisitis karena pada kenyataannya struktur, fondasi, dan tanah akan saling berinteraksi saat struktur memikul beban. Pada studi ini, struktur bangunan Tower Aubrey Apartemen Grand Shamaya Surabaya akan dianalisis berdasarkan SNI 2847:2019 dengan pemodelan fixed base dan soil structure interaction (SSI). Bangunan memiliki 53 lantai dan 2 lantai basement dengan dual systems menggunakan fondasi piled raft di atas tanah lunak. Kekakuan tanah dimodelkan dengan linear spring berdasarkan linearisasi p-y curve serta hasil perhitungan settlement, maupun rumus empiris yang diberikan pada dinding basement, raft, dan pile. Beban gempa menggunakan linear time history analysis dengan 3 rekaman gempa. Dari hasil studi ini, didapatkan pemodelan SSI meningkatkan periode bangunan sebesar 22,8%, meningkatkan drift maksimum sebesar 35,3%, serta mengurangi ketidakberaturan torsi pada struktur. Peningkatan drift yang terjadi melebihi syarat pada SNI 1726:2019, maka dilakukan perbesaran dimensi untuk desain struktur SSI. Didapatkan rentang rasio perbandingan antara elemen struktur fixed base dan SSI dimana pada kolom memiliki rasio luas penampang 1,33-1,67; luas tulangan 0,73-1,22; dan ρ 0,49-0,87; pada balok memiliki rasio luas penampang 1,29-1,80; rasio luas tulangan 1,10-1,63; rasio ρ 0,79-0,97; pada dinding struktural memiliki rasio luas penampang 1; rasio luas tulangan 1,06-1,13; rasio ρ 1,06-1,13. Dengan hasil tersebut, efek dari SSI tidak selalu menguntungkan, sehingga perencanaan gedung tinggi di atas tanah lunak perlu memperhatikan SSI karena peningkatan drift yang terjadi dapat melebihi batas yang disyaratkan oleh SNI 1726:2019.
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Typically, the influence of the soil is neglected in the modeling process. The upper and lower structures of the building are modeled and analyzed separately for practical reasons and to reduce computational time in the overall structural analysis. In the modeling of upper structures, the soil is often assumed to have infinite stiffness, implying that the structure is fixed at its base. This approach may yield unrealistic structural response results since, in reality, the structure, foundation, and soil interact when the structure supports loads. This study analyzes the Aubrey Tower Grand Shamaya Apartment Surabaya according to SNI 2847:2019 guidelines, employing both fixed base and soil-structure interaction (SSI) modeling. The building, comprising 53 floors and 2 basement levels with dual systems utilizes piled raft foundations on soft soil. Soil stiffness is modeled using linear springs based on p-y curve linearization, settlement calculations, and empirical formulas applied to basement walls, raft, and piles. Seismic loads are evaluated using linear time history analysis with three earthquake records. The results show that SSI modeling increases the building's period by 22.8%, increases maximum drift by 35.3%, and reduces torsional irregularities in the structure. The observed increase in drift exceeds the criteria set by SNI 1726:2019, necessitating dimensional adjustments in SSI structural design. The study identified ranges of the ratio comparisons between fixed base and SSI structural elements, where for columns the cross-sectional area ratio ranges from 1.33 to 1.67, reinforcement area ratio from 0.73 to 1.22, and ρ ratio from 0.49 to 0.87; for beams, the cross-sectional area ratio ranges from 1.29 to 1.80, reinforcement area ratio from 1.10 to 1.63, and ρ ratio from 0.79 to 0.97; for structural walls, the cross-sectional area ratio is 1, reinforcement area ratio ranges from 1.06 to 1.13, and ρ ratio from 1.06 to 1.13. These findings suggest that the effects of SSI are not always advantageous. Consequently, design considerations for tall buildings on soft soil should include SSI to prevent drift increases exceeding limits specified by SNI 1726:2019.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Analisis Riwayat Waktu Linear, Interaksi Tanah Struktur (ITS), Respons Struktur, Sistem Ganda, Dual Systems, Linear Time History Analysis, Soil Structure Interaction (SSI), Structure Response
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA444 Reinforced concrete T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations. T Technology > TH Building construction > TH1095 Earthquakes and building
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Vincent Hans Siputra
Date Deposited:	30 Jul 2024 07:55
Last Modified:	30 Jul 2024 07:55
URI:	http://repository.its.ac.id/id/eprint/110619

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