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Yanisfa Septiarsilia
Adhi Tama Institute Of Technology
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Transportation Other

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PERKUATAN ELEMEN BALOK BETON BERTULANG MENGGUNAKAN MATERIAL CFRP : STUDI KASUS GEDUNG BANK Yanisfa Septiarsilia; Anditya Hendra Pratama; Jaka Propika; Indra Komara; Heri Istiono; Ahmad Hernadi
Civil Engineering Scientific Journal Vol 5, No 1 (2026): Civil Engineering Scientific Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/cesj.v5i1.7301

Abstract

ABSTRACT: The addition of floors and changes in building function can modify the load distribution and affect the capacity of structural elements, making it necessary to evaluate the existing structure to ensure that it can safely accommodate the new loading conditions. If the capacity is insufficient, strengthening is required, one method being the use of Carbon Fiber Reinforced Polymer (CFRP). This study includes the collection of existing structural data, structural modeling using analysis software, and the application of loads based on actual building conditions. The modeling results are used to assess the beam’s capacity under the additional loads, and if it does not meet the required strength, a strengthening system using CFRP is designed. In this research, an analysis was carried out on beam component B1 As 2-3 with a span length of 4.8 meters, considering an additional dead load from screed of 27.32 kN and an additional live load of 31.93 kN due to the functional change from office space to corridor. These added loads resulted in a new ultimate moment of 642.26 kNm, while the beam’s nominal moment capacity was only 530.29 kNm, indicating a required strengthening of at least 111.97 kNm. The analysis determined that three layers of CFRP were required, and with the CFRP installation, the new nominal moment capacity increased to 766 kNm, providing a total strength improvement of 44%.Keywords: Structural Strengthening, Beam Element, CFRP, Material, Reinforced Concrete. ABSTRAK: Penambahan lantai dan perubahan fungsi bangunan dapat mengubah distribusi beban dan kapasitas elemen struktur, sehingga diperlukan evaluasi untuk memastikan kemampuan struktur eksisting menahan beban baru. Bila kapasitas tidak mencukupi, perkuatan diperlukan, salah satunya menggunakan Carbon Fiber Reinforced Polymer (CFRP). Penelitian ini mencakup pengumpulan data eksisting, pemodelan struktur dengan bantuan perangkat lunak analisis struktur, serta penerapan pembebanan sesuai kondisi aktual. Hasil pemodelan digunakan untuk menilai kapasitas balok terhadap beban tambahan, dan jika tidak memenuhi syarat kekuatan, dirancang sistem perkuatan dengan CFRP. Pada penelitian ini dilakukan analisa komponen struktur balok B1 As 2-3 dengan panjang bentang 4.8 meter dengan penambahan beban mati akibat screed sebesar 27.32 kN dan beban hidup akibat perubahan fungsi ruang kantor menjadi koridor sebesar 31.93 kN. Dari penambahan beban tersebut didapatkan momen ultimate yang baru yaitu sebesar 642.26 kNm. Sedangkan momen nominal balok tersebut hanya sebesar 530.29 kNm, sehingga dibutuhkan perkuatan setidaknya sebesar 111.97 kNm. Dari hasil analisa didapatkan jumlah layer CFRP yang dibutuhkan yaitu sebanyak 3 layer, dengan penambahan CFRP didapatkan momen nominal yang baru yaitu sebesar 766 kNm. Dengan begitu didapatkan penambahan perkuatan sebesar 44%.Kata kunci: Perkuatan Struktur, Elemen Balok, CFRP, Material, Beton Bertulang.
Perbandingan Kuat Tekan Beton dengan Subtitusi Fly Ash Ditinjau dari Air Laut dan Air Tawar pada Proses Curing Dewi Pertiwi; Dewi Kusumaningrum; Yanisfa Septiarsilia; Jaka Propika; Eka Susanti; Heri Istiono
Jurnal Teknik Sipil Vol 6, No 2 (2025)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jts.2025.v6i2.8511

Abstract

Curing plays a vital role in concrete production, as proper treatment is essential before conducting a compressive strength test to ensure optimal results. Concrete cured in seawater often exhibits different strength characteristics due to the salt content. This study examines the effects of curing with both seawater and freshwater on concrete containing fly ash. The research aims to compare the compressive strength of concrete with fly ash substitution under two different curing conditions. Using an experimental approach, the study incorporated 40% fly ash and 1% polycarboxylate admixture into the concrete mix to target a high compressive strength of K-500. Results indicate that concrete with fly ash cured in seawater achieved an average compressive strength of 807.40 kg/cm² at 28 days, while concrete cured in freshwater reached only 667.94 kg/cm².
Perbandingan Kinerja Struktur Beton Bertulang dan Struktur Komposit pada Gedung Universitas Katolik Darma Cendika Yonatan Gidio; Eka Susanti; Dewi Pertiwi; Indra Komara; Dita Kamarul F; Yanisfa Septiarsilia; Jaka Propika; Heri Istiono
Jurnal Teknik Sipil Vol 7, No 1 (2026)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jts.2026.v7i1.8869

Abstract

Bangunan gedung Universitas Katolik Darma Cendika dirancang menggunakan struktur beton bertulang dengan dimensi elemen yang relatif besar, sehingga berdampak pada meningkatnya berat sendiri struktur dan kurang optimalnya efisiensi ruang. Penelitian ini bertujuan untuk mengevaluasi perilaku struktur eksisting serta melakukan redesain menggunakan struktur komposit guna meningkatkan efisiensi dan kinerja bangunan. Metode yang digunakan meliputi studi literatur, pengumpulan data struktur eksisting, analisis pembebanan berdasarkan SNI, serta pemodelan struktur menggunakan perangkat lunak ETABS. Evaluasi dilakukan terhadap perilaku struktur dan ketidakberaturan bangunan, kemudian dilanjutkan dengan perencanaan elemen kolom dan balok komposit serta analisis perbandingan dengan struktur eksisting.Hasil penelitian menunjukkan bahwa struktur eksisting telah memenuhi persyaratan perilaku sesuai SNI 1726:2019, namun memiliki ketidakberaturan horizontal dan vertikal yang memerlukan perhatian khusus dalam desain. Redesain dengan struktur komposit menghasilkan dimensi elemen yang lebih ramping dengan kapasitas yang tetap memenuhi syarat. Selain itu, terjadi penurunan berat elemen struktur yang signifikan, yaitu sebesar 34,3% pada balok dan 58,8% pada kolom. Dengan demikian, struktur komposit terbukti lebih efisien dan mampu meningkatkan kinerja struktur, khususnya dalam mengurangi beban gempa yang bekerja pada bangunan
Seismic Performance Evaluation Of Building Structures Modified With Special Concentrically Braced Frames (SCBF) Yanisfa Septiarsilia; Eka Susanti; Dita Kamarul Fitriyah; Dewi Pertiwi; Umbu Miron
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 11 No 1 (2026): MARET
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v11i1.1617

Abstract

The Concentrically Braced Frame (CBF) system utilizes diagonal steel bracing members to enhance structural stiffness and dissipate seismic energy, thereby reducing potential damage to primary structural elements. CBF systems are classified into Special Concentrically Braced Frames (SCBF) and Ordinary Concentrically Braced Frames (OCBF), which are applied in high and moderate-to-low seismic regions, respectively. This study evaluates the modification of an existing 13-story hotel building into an SCBF system in accordance with the latest Indonesian seismic design provisions. The research methodology includes a literature review on SCBF design principles and the most recent SNI standards, preliminary design, numerical modeling, and dynamic analysis using SAP2000. The structural behavior parameters evaluated in this study include mass participation, fundamental period (time period), and interstory drift. The results indicate that both the existing structure with a Dual System (SMRF and shear wall) and the SCBF-modified structure satisfy the minimum 90% mass participation requirement specified in SNI 1726:2019, with the SCBF system achieving this criterion using fewer vibration modes. However, the evaluation of the fundamental period shows that the existing structure remains within the allowable code limits, whereas the SCBF-modified structure exceeds the maximum permitted fundamental period, indicating increased structural flexibility and insufficient lateral stiffness. In terms of interstory drift performance, both structural systems comply with the drift limits specified in SNI 1726:2019; nevertheless, the Dual System demonstrates superior lateral deformation control compared to the SCBF system. Therefore, it can be concluded that the structural modification using the SCBF system in this study was not successful in replacing or outperforming the existing Dual System. Although the SCBF configuration meets certain code requirements, it does not provide adequate lateral stiffness nor improved seismic performance compared to the original structural system.
Co-Authors Ahmad Hernadi Anditya Hendra Pratama Aniendhita Rizki Amalia Apriyanto, Arie Fauzi Arintha Indah Dwi Syafiarti Budi Suswanto Data Iranata Dewi Kusumaningrum Dewi Pertiwi dewi pertiwi Dita Kamarul Fitriyah Eka Susanti Eka Susanti Eka susanti Felicia Tria Nuciferani Hendra Wijayana Heri Istiono Heri Istiono I Gusti Putu Raka Indra Komara Indra Komara Indra Komara, Indra Istiono, Heri Jaka Propika Jaka Propika Jaka Propika Jenny Caroline Kartiko, Andi Susilo Katon Putra Baskara Kurnia Hadi Putra Kurnia Hadi Putra, Kurnia Hadi Laras Laila Lestari Mila Kusuma Wardani Prasetyo, Agus Edy Putra Tri Yudhatama Risky Murinda Sekartadji, Ratih Siti Choiriyah Siti Choiriyah Tavio, Tavio Theresia Maria CA Umbu Miron Umbu Miron Wijayana, Hendra Yonatan Gidio Yudhatama, Putra Tri Yuyun Tajunnisa