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Johan Lautan Wijaya Nusantara
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Self Compacting Concrete dengan Serat Limbah Scrap Baja dan Abu Sekam Padi Amalia; Lilis Tiyani; Yanuar Setiawan; Johan Lautan Wijaya Nusantara
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1295

Abstract

Abstrak   Beton merupakan material getas yang mempunyai kuat tekan tinggi, namun memiliki kuat tarik rendah.  Kelemahan ini dapat diantisipasi dengan penggunaan serat sebagai micro reinforcement pada beton. Penelitian ini menguji karakteristik beton Self Compacting Concrtete (SCC) dengan campuran 5% Abu Sekam Padi (ASP) yang diberikan tambahan berbagai dosis serat limbah Scrap Baja, yaitu 0%, 0,25 %, 0,50 %, 0,75% , dan 1% dari berat beton. Pengujian Kuat Tekan, Kuat Tarik Belah, Tegangan-Regangan, dan Modulus Elastisitas dilakukan dengan menggunakan benda uji silinder beton diameter 15 cm, tinggi 30 cm. Sedangkan, Kuat Lentur beton diuji dengan benda uji balok berukuran 10 cm x 10 cm x 100 cm. Hasil penelitian menunjukkan bahwa penggunaan ASP sebesar 5% dan limbah serat baja sampai dengan 0,75% dapat meningkatkan Kuat Tekan, Kuat Lentur, Kuat Tarik, Modulus Elastisitas, dan Regangan maksimum pada beton.   Kata kunci: Serat Limbah Scrap Baja, Abu Sekam Padi, Kuat Tekan, Kuat Lentur, Modulus Elastisitas   Abstract   Concrete is a brittle material with high compressive strength but low tensile strength. This weakness can be addressed by adding fibers as micro-reinforcement within the concrete mixing. This research investigates the characteristics of Self-Compacting Concrete (SCC) with a 5% Rice Husk Ash (RHA) mixture, supplemented by varying dosages of waste steel scrap fibers: 0%, 0.25%, 0.50%, 0.75%, and 1% of the concrete weight. Compressive Strength, Split Tensile Strength, Stress-strain behavior, and Modulus of Elasticity were tested using cylindrical concrete specimens with a diameter of 15 cm and a height of 30 cm. Additionally, the Flexural Strength of the concrete was evaluated using beam specimens 10 cm x 10 cm x 100 cm. The results indicate that the addition of 5% RHA and steel fiber waste up to 0.75% can significantly enhance the compressive strength, flexural strength, tensile strength, modulus of elasticity, and maximum strain of the concrete.   Keywords: Fiber of streel scrap waste, Rice Husk Ash, Compressive Strength, Flexural Strength, Modulus of Elasticity
Self Compacting Concrete dengan Serat Limbah Scrap Baja dan Abu Sekam Padi Amalia; Lilis Tiyani; Yanuar Setiawan; Johan Lautan Wijaya Nusantara
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1295

Abstract

Abstrak   Beton merupakan material getas yang mempunyai kuat tekan tinggi, namun memiliki kuat tarik rendah.  Kelemahan ini dapat diantisipasi dengan penggunaan serat sebagai micro reinforcement pada beton. Penelitian ini menguji karakteristik beton Self Compacting Concrtete (SCC) dengan campuran 5% Abu Sekam Padi (ASP) yang diberikan tambahan berbagai dosis serat limbah Scrap Baja, yaitu 0%, 0,25 %, 0,50 %, 0,75% , dan 1% dari berat beton. Pengujian Kuat Tekan, Kuat Tarik Belah, Tegangan-Regangan, dan Modulus Elastisitas dilakukan dengan menggunakan benda uji silinder beton diameter 15 cm, tinggi 30 cm. Sedangkan, Kuat Lentur beton diuji dengan benda uji balok berukuran 10 cm x 10 cm x 100 cm. Hasil penelitian menunjukkan bahwa penggunaan ASP sebesar 5% dan limbah serat baja sampai dengan 0,75% dapat meningkatkan Kuat Tekan, Kuat Lentur, Kuat Tarik, Modulus Elastisitas, dan Regangan maksimum pada beton.   Kata kunci: Serat Limbah Scrap Baja, Abu Sekam Padi, Kuat Tekan, Kuat Lentur, Modulus Elastisitas   Abstract   Concrete is a brittle material with high compressive strength but low tensile strength. This weakness can be addressed by adding fibers as micro-reinforcement within the concrete mixing. This research investigates the characteristics of Self-Compacting Concrete (SCC) with a 5% Rice Husk Ash (RHA) mixture, supplemented by varying dosages of waste steel scrap fibers: 0%, 0.25%, 0.50%, 0.75%, and 1% of the concrete weight. Compressive Strength, Split Tensile Strength, Stress-strain behavior, and Modulus of Elasticity were tested using cylindrical concrete specimens with a diameter of 15 cm and a height of 30 cm. Additionally, the Flexural Strength of the concrete was evaluated using beam specimens 10 cm x 10 cm x 100 cm. The results indicate that the addition of 5% RHA and steel fiber waste up to 0.75% can significantly enhance the compressive strength, flexural strength, tensile strength, modulus of elasticity, and maximum strain of the concrete.   Keywords: Fiber of streel scrap waste, Rice Husk Ash, Compressive Strength, Flexural Strength, Modulus of Elasticity
Kinerja Seismik dan Distribusi Sendi Plastis Pada Bangunan 20 Lantai dengan Dinding Geser Terputus Menggunakan Analisis Riwayat Waktu Nonlinear Kholis Hapsari Pratiwi; Faisal Harun Purnomo; Johan Lautan Wijaya Nusantara; Aziz Abdul Majid; Jafar Aji Pramono
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1438

Abstract

Abstrak   Studi ini menganalisis dampak reduksi tinggi shear wall vertikal dengan model 100%, 80%, dan 70% pada gedung 20 lantai di wilayah Ring of Fire Indonesia. Menggunakan Static Pushover dan NLTHA (El Centro 1940 & Kobe 1995), penelitian ini mengevaluasi parameter seismik (R, Ω, Cd) serta melacak tingkat kerusakan plastic hinge (>E) akibat efek mode tinggi. Hasil menunjukkan bahwa pemotongan shear wall memperpanjang periode fundamental gedung. Fleksibilitas global yang meningkat ini berhasil mereduksi reaksi dasar maksimum (base shear) yang ditransfer ke fondasi. Dari aspek daktilitas, penurunan interaksi aksial-momen di dasar model diskontinu meminimalkan pembentukan plastic hinge tingkat runtuh (>E) pada elemen pembatas dibandingkan konfigurasi penuh. Kesimpulannya, konfigurasi shear wall diskontinu memberikan kinerja seismik yang optimal dan sangat ekonomis. Namun, lantai terminasi wajib direkayasa dengan detail tulangan kaku guna mencegah risiko mekanisme soft-story.   Kata kunci: Dinding geser diskontinu, Analisis pushover statik, Nonlinear Time History Analysis (NLTHA), Sendi plastis     Abstract   This study analyzes the impact of reducing the height of vertical shear walls by 100%, 80%, and 70% on a 20-story building in Indonesia’s Ring of Fire region. Using Static Pushover and NLTHA (El Centro 1940 & Kobe 1995), this research evaluates seismic parameters (R, Ω, Cd) and tracks the plastic hinge damage level (>E) resulting from high-mode effects. The results show that shear wall reduction extends the building’s fundamental period. This increased global flexibility successfully reduces the maximum base reaction (base shear) transferred to the foundation. From a ductility perspective, the reduced axial-moment interaction at the base of the discontinuous model minimizes the formation of collapse-level plastic hinges (>E) in the boundary elements compared to the full configuration. In conclusion, the discontinuous shear wall configuration provides optimal seismic performance and is highly economical. However, the termination floor must be engineered with rigid reinforcement details to prevent the risk of a soft-story mechanism.   Keywords: Discontinuous shear walls, Static pushover analysis, Nonlinear Time History Analysis (NLTHA), Plastic hinges
Kinerja Seismik dan Distribusi Sendi Plastis Pada Bangunan 20 Lantai dengan Dinding Geser Terputus Menggunakan Analisis Riwayat Waktu Nonlinear Kholis Hapsari Pratiwi; Faisal Harun Purnomo; Johan Lautan Wijaya Nusantara; Aziz Abdul Majid; Jafar Aji Pramono
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1438

Abstract

Abstrak   Studi ini menganalisis dampak reduksi tinggi shear wall vertikal dengan model 100%, 80%, dan 70% pada gedung 20 lantai di wilayah Ring of Fire Indonesia. Menggunakan Static Pushover dan NLTHA (El Centro 1940 & Kobe 1995), penelitian ini mengevaluasi parameter seismik (R, Ω, Cd) serta melacak tingkat kerusakan plastic hinge (>E) akibat efek mode tinggi. Hasil menunjukkan bahwa pemotongan shear wall memperpanjang periode fundamental gedung. Fleksibilitas global yang meningkat ini berhasil mereduksi reaksi dasar maksimum (base shear) yang ditransfer ke fondasi. Dari aspek daktilitas, penurunan interaksi aksial-momen di dasar model diskontinu meminimalkan pembentukan plastic hinge tingkat runtuh (>E) pada elemen pembatas dibandingkan konfigurasi penuh. Kesimpulannya, konfigurasi shear wall diskontinu memberikan kinerja seismik yang optimal dan sangat ekonomis. Namun, lantai terminasi wajib direkayasa dengan detail tulangan kaku guna mencegah risiko mekanisme soft-story.   Kata kunci: Dinding geser diskontinu, Analisis pushover statik, Nonlinear Time History Analysis (NLTHA), Sendi plastis     Abstract   This study analyzes the impact of reducing the height of vertical shear walls by 100%, 80%, and 70% on a 20-story building in Indonesia’s Ring of Fire region. Using Static Pushover and NLTHA (El Centro 1940 & Kobe 1995), this research evaluates seismic parameters (R, Ω, Cd) and tracks the plastic hinge damage level (>E) resulting from high-mode effects. The results show that shear wall reduction extends the building’s fundamental period. This increased global flexibility successfully reduces the maximum base reaction (base shear) transferred to the foundation. From a ductility perspective, the reduced axial-moment interaction at the base of the discontinuous model minimizes the formation of collapse-level plastic hinges (>E) in the boundary elements compared to the full configuration. In conclusion, the discontinuous shear wall configuration provides optimal seismic performance and is highly economical. However, the termination floor must be engineered with rigid reinforcement details to prevent the risk of a soft-story mechanism.   Keywords: Discontinuous shear walls, Static pushover analysis, Nonlinear Time History Analysis (NLTHA), Plastic hinges
Co-Authors Amalia Aziz Abdul Majid Faisal Harun Purnomo Jafar Aji Pramono Kholis Hapsari Pratiwi Lilis Tiyani Yanuar Setiawan