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KUAT TEKAN BETON AWAL TINGGI DENGAN VARIASI PENAMBAHAN SUPERPLASTICIZER DAN SILICA FUME Prayuda, Hakas; Saleh, Fadillawaty
Media Teknik Sipil Vol 17, No 1 (2019): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Concrete is one of the construction materials of combination between cement, fine aggregate, coarse aggregate, and water mixed into one solid mass. The work of concrete making can be added a mineral additive as well as chemical additive (admixture) for the interest in construction work. In some cases construction work is desirable for concrete to produce optimum strength during the early age of the concrete so that the timing of concreting work can be shortened. The strength of concrete at the early age can be increased with added mineral (additive) and chemical (admixture) materials. This research made a mixture of concrete with 7 variations of mixture with total specimen 54 sample of cylindrical size with diameter 15 cm and height 30 cm. Tests conducted in the form of testing workability and compressive strength of concrete at the age of 3 days, 7 days and 28 days. Through this study obtained the right composition to make concrete with a high early age of compressive strength.

FRESH AND MECHANICAL CHARACTERISTICS OF SELF-COMPACTING POLYPROPYLENE FIBER CONCRETE INCORPORATED WITH KAOLIN Saleh, Fadillawaty; Cahyati, Martyana Dwi; Prayuda, Hakas; Zega, Berkat Cipta; Monika, Fanny
SINERGI Vol 24, No 3 (2020)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2020.3.007

Self Compacting Concrete (SCC) is concrete with high fluidity so that it can flow and fill the spaces in the mold without the compaction process. This study discusses the effect of the adding of kaolin and polypropylene fibers in order to increase the flowability, compressive strength, flexural strength, and tensile strength in self-compacting concrete. The additional material of kaolin was 5%, 10%, and 15% of the cement weight. The polypropylene fibers were 1%, 1.5%, and 2%. The flowability test, which was used, was Table flow, V-Funnel, and L-Box. Compressive strength testing was conducted when the concrete was 7, 14, and 28 days old. The flexural test was performed with a measurement of 150 x 150 x 600 mm as many as 18 specimens tested at the age of 28 days. The results showed that the addition of kaolin and polypropylene fibers met the flowability specifications of self-compacting concrete. The addition of polypropylene can increase the flexural strength and tensile strength of the concrete beam, but cannot increase the compressive strength of self-compacting concrete.

Studi Numerik Pengaruh Ukuran Penampang, Rasio Tulangan Lentur dan Jarak Tulangan Geser Terhadap Kekakuan Balok Beton Bertulang Menggunakan Program Respone 2000 Prayuda, Hakas; Saleh, Fadillawaty; Istiawan, Istiawan
Semesta Teknika Vol 21, No 1 (2018): MEI 2018
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.211207

One of the reinforced concrete beam behavior can be seen from the value of deflection, maximum load, and the relationship between moment with curvature and stiffness of the beam. Respone 2000 program is an approach program with numerical method that can be used to analyze the reinforced concrete beam. The results of this program include the value of deflection, maximum load, moment and curvature. This study aims to obtain numerical results in the form of stiffness of the beam, deflection value, maximum load, moment and curvature until the crack pattern occurs. This research was done by making 32 sample beam with variation of cross section of beam, flexural reinforcement ratio and shear reinforcement distance. The result of the analysis shows that the length of the span has a big effect on the deflection value, the maximum load and the stiffness but not the nominal moment. The results of the reinforcement ratio in this study greatly affect the deflection value, the masimum load, the nominal moment and the stiffness of the beam, while the shear reinforcement distance affects the beam behavior but only on some specimens.

Evaluasi Pengelolaan, Pengawasan dan Pengendalian Sistem Proteksi Kebakaran pada Gedung di Universitas Muhammadiyah Yogyakarta Saugani, Muh Sofyan; Saleh, Fadillawaty; Prayuda, Hakas; Tiyani, Lilis; Al Zakina, Bella Lutfiani
Semesta Teknika Vol 23, No 2 (2020): NOVEMBER 2020
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v23i2.11917

Sistem proteksi kebakaran pada bangunan gedung haruslah dikelola, supervisi dan control dengan baik untuk menghindari bencana yang membahayakan. Pemenuhan dan penyesuaian sistem proteksi kebakaran terhadap syarat dan ketentuan yang berlaku diperlukan untuk mengelola, memantau, dan mengendalikan sistem dengan baik. Gedung kampus Universitas Muhammadiyah Yogyakarta (UMY) berpotensi mengalami kebakaran, karena terdapat material yang mudah terbakar dan komponen penyebab kebakaran, sehingga perlu dilakukan pengkajian terhadap sistem proteksi kebakaran yaitu pada pengelolaan, pengawasan, dan pengendalian sistem proteksi kebakaran di gedung. Penelitian ini dilakukan untuk menindaklanjuti hal tersebut. Jenis penelitian yang digunakan adalah jenis penelitian pendekatan kuantitatif data penelitian diperoleh dari hasil penilaian gedung dan wawancara pemilik/pengelola gedung. Hasil yang diperoleh dari penelitian ini adalah tingkat keandalan pengelolaan, pengawasan, dan pengendalian sistem proteksi pada Gedung E6, E7, Pascasarjana dan F3 di UMY. Analisis yang dilakukan memberikan persentase masing-masing 59,52%, (E6 dan E7), 58,03% (Pascasarjana), dan 56,80% (F3) dalam hal pengelolaan dan tingkat keandalannya kurang, sedangkan dari segi pengawasan dan identifikasi masing-masing gedung mendapat persentase yang sama sebesar 69,07% dan tingkat reliabilitas cukup. Hasil ini dapat disimpulkan bahwa tingkat keandalan sistem proteksi kebakaran masih banyak yang berada dibawah 60% sehingga dikategorikan kurang baik.Fire protection systems in buildings must be managed, supervised, and controlled properly to avoid the risk of disaster. Fulfillment and adjustment to the fire protection system against applicable terms and conditions is required to manage, monitor, and control the system properly. The campus building of Universitas Muhammadiyah Yogyakarta (UMY) has the potential to experience fire, because it there are combustible materials and fire-causing components, so it is necessary to do an assessment on fire protection system that is on the management, supervision, and control of fire protection system in the building. This research is done to follow up the matter. Research type used in this research is with quantitative approach, research data obtained from result of building assessment and interview owner/manager of building. The results obtained from this research are the level of reliability of management, supervision, and control of protection system in Building E6, E7, Postgraduates and F3 at UMY. The analysis performed gives the percentage respectively 59.52% (E6 and E7), 58.03% (Postgraduates), and 56.80% (F3) in terms of management and the reliability level is deficient, while in terms of supervision and identification of each building gets the same percentage of 69.07% and the reliability level is sufficient. Based on the results, it can be concluded that the level of reliability on fire protection management still below 60% or in poor condition. Â

Studi Numerik Pengaruh Ukuran Penampang, Rasio Tulangan Lentur dan Jarak Tulangan Geser Terhadap Kekakuan Balok Beton Bertulang Menggunakan Program Respone 2000 Prayuda, Hakas; Saleh, Fadillawaty; Istiawan, Istiawan
Semesta Teknika Vol 21, No 1 (2018): MEI 2018
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.211207

One of the reinforced concrete beam behavior can be seen from the value of deflection, maximum load, and the relationship between moment with curvature and stiffness of the beam. Respone 2000 program is an approach program with numerical method that can be used to analyze the reinforced concrete beam. The results of this program include the value of deflection, maximum load, moment and curvature. This study aims to obtain numerical results in the form of stiffness of the beam, deflection value, maximum load, moment and curvature until the crack pattern occurs. This research was done by making 32 sample beam with variation of cross section of beam, flexural reinforcement ratio and shear reinforcement distance. The result of the analysis shows that the length of the span has a big effect on the deflection value, the maximum load and the stiffness but not the nominal moment. The results of the reinforcement ratio in this study greatly affect the deflection value, the masimum load, the nominal moment and the stiffness of the beam, while the shear reinforcement distance affects the beam behavior but only on some specimens.

Evaluasi Pengelolaan, Pengawasan dan Pengendalian Sistem Proteksi Kebakaran pada Gedung di Universitas Muhammadiyah Yogyakarta Saugani, Muh Sofyan; Saleh, Fadillawaty; Prayuda, Hakas; Tiyani, Lilis; Al Zakina, Bella Lutfiani
Semesta Teknika Vol 23, No 2 (2020): NOVEMBER 2020
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v23i2.11917

Sistem proteksi kebakaran pada bangunan gedung haruslah dikelola, supervisi dan control dengan baik untuk menghindari bencana yang membahayakan. Pemenuhan dan penyesuaian sistem proteksi kebakaran terhadap syarat dan ketentuan yang berlaku diperlukan untuk mengelola, memantau, dan mengendalikan sistem dengan baik. Gedung kampus Universitas Muhammadiyah Yogyakarta (UMY) berpotensi mengalami kebakaran, karena terdapat material yang mudah terbakar dan komponen penyebab kebakaran, sehingga perlu dilakukan pengkajian terhadap sistem proteksi kebakaran yaitu pada pengelolaan, pengawasan, dan pengendalian sistem proteksi kebakaran di gedung. Penelitian ini dilakukan untuk menindaklanjuti hal tersebut. Jenis penelitian yang digunakan adalah jenis penelitian pendekatan kuantitatif data penelitian diperoleh dari hasil penilaian gedung dan wawancara pemilik/pengelola gedung. Hasil yang diperoleh dari penelitian ini adalah tingkat keandalan pengelolaan, pengawasan, dan pengendalian sistem proteksi pada Gedung E6, E7, Pascasarjana dan F3 di UMY. Analisis yang dilakukan memberikan persentase masing-masing 59,52%, (E6 dan E7), 58,03% (Pascasarjana), dan 56,80% (F3) dalam hal pengelolaan dan tingkat keandalannya kurang, sedangkan dari segi pengawasan dan identifikasi masing-masing gedung mendapat persentase yang sama sebesar 69,07% dan tingkat reliabilitas cukup. Hasil ini dapat disimpulkan bahwa tingkat keandalan sistem proteksi kebakaran masih banyak yang berada dibawah 60% sehingga dikategorikan kurang baik.Fire protection systems in buildings must be managed, supervised, and controlled properly to avoid the risk of disaster. Fulfillment and adjustment to the fire protection system against applicable terms and conditions is required to manage, monitor, and control the system properly. The campus building of Universitas Muhammadiyah Yogyakarta (UMY) has the potential to experience fire, because it there are combustible materials and fire-causing components, so it is necessary to do an assessment on fire protection system that is on the management, supervision, and control of fire protection system in the building. This research is done to follow up the matter. Research type used in this research is with quantitative approach, research data obtained from result of building assessment and interview owner/manager of building. The results obtained from this research are the level of reliability of management, supervision, and control of protection system in Building E6, E7, Postgraduates and F3 at UMY. The analysis performed gives the percentage respectively 59.52% (E6 and E7), 58.03% (Postgraduates), and 56.80% (F3) in terms of management and the reliability level is deficient, while in terms of supervision and identification of each building gets the same percentage of 69.07% and the reliability level is sufficient. Based on the results, it can be concluded that the level of reliability on fire protection management still below 60% or in poor condition. Â

Kuat Tarik Belah Self-Compacting Concrete Dengan Bahan Tambah Abu Sekam Padi Sebagai Pengganti Agregat Halus Prayuda, Hakas; Monika, Fanny; Saleh, Fadillawaty; Ramadhan, Ramadhan; Cahyati, Martyana Dwi; Aji, Kartika Restu
Proceeding Universitas Muhammadiyah Yogyakarta Graduate Conference Vol. 1 No. 1 (2020): Armoring the Youth to Contribute to the SDGs
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (210.462 KB)

Self-compacting concrete (SCC) merupakan beton yang dapat mengalir dan memadat dengan berat sendirinya, sehingga dapat mempercepat dan mempermudah pengecoran dalam suatu pekerjaan proyek konstruksi. Tujuan penelitian ini adalah untuk mengetahui flowability dan kuat tarik self-compacting concrete dengan penambahan abu sekam padi sebagai pengganti sebagian agregat halus dan penambahan silica fume sebagai pengganti sebagaian semen. Abu sekam padi merupakan salah satu limbah hasil pertanian yang belum dimanfaatkan secara optimal, sehingga melalui penelitian ini diharapkan pemanfaatan abu sekam padi menjadi lebih efektif. Kadar silica fume yang digunakan sebesar 5% dari berat semen, sedangkan variasi abu sekam padi yang digunakan sebesar 20%, 40%, 60% dari berat agregat halus. Pengujian beton segar menggunakan metode slump flow, J-ring, L-box and V-funnel untuk mengukur kemampuan beton mengalir sendiri. Pengujian kuat tarik beton dilakukan pada umur 3 hari, 7 hari, 28 hari dengan benda uji berbentuk silinder ukuran 15 x 30 cm. Berdasarkan hasil penelitian didapat bahwa semakin tinggi kadar abu sekam padi yang digunakan maka kuat tarik mengalami penurunan. Kuat tarik optimal dimiliki oleh campuran abu sekam padi 20% dengan kuat tarik rata-rata sebesar 1,23 MPa pada umur 3 hari, 1,24 MPa pada umur 7 hari, 1,31 MPa pada umur 28 hari. Sedangkan melalui pengujian betonsegar menunjukkan bahwa abu sekam padi dapat digunakan sebagai bahan tampah untuk self-compacting concrete.

Pengaruh Ketidakberaturan Bentuk Bangunan Beton Bertulang Bertingkat Tinggi Terhadap Perilaku Seismik Prayuda, Hakas; Maulana, Taufiq Ilham; Putra, Firhan Mahreza Yunanto; Salsabila, Bella; Saleh, Fadillawaty
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.2023.30.2.17

Abstrak Penelitian ini bertujuan untuk menginvestigasi perilaku bangunan beton bertulang bertingkat tinggi yang memiliki ketidakberaturan bentuk arah vertikal dan horizontal terhadap beban seismik. Ketidakberaturan bentuk bangunan gedung bertingkat tinggi memiliki pengaruh dalam menahan beban gempa. Keterbatasan lahan serta pertimbangan efek eastetik menyebabkan seringkali bangunan bertingkat tinggi didesain tanpa mempertimbangkan ketidakberaturan bentuk. Penelitian ini menggunakan bangunan gedung 12 lantai yang didesain dengan dua tipe ketidakberaturan horizontal yaitu berbentuk T dan U. Masing-masing ketidakberaturan horizontal memiliki 5 variasi ketidakberaturan vertikal, sehingga total variasi pada penelitian ini terdiri dari 10 model. Struktur frame di analisis menggunakan software STERA 3D untuk analisis non-linier dinamik riwayat waktu. Tiga data gempa digunakan sebagai variasi beban seismik untuk masing-masing model yaitu data riwayat waktu gempa El-Centro, Kobe dan Parkfield. Perilaku seismik bangunan gedung yang diinvestigasi pada penelitian ini terdiri dari gaya geser, deformasi lateral, kekakuan bangunan, hubungan gaya geser dasar dengan deformasi, drift ratio dan percepatan maksimum. Hasil analisis numerik menunjukkan bahwa setiap model memiliki perilaku yang berbeda-beda ketika diberikan beban sesimik dan input kualitas material yang sama. Sehingga dapat disimpulkan bahwa ketidakberaturan bangunan arah horizontal dan vertikal sangat mempengaruhi perilaku sesimik bada bangunan gedung beton bertulang bertingkat tinggi Abstract The purpose of this study is to investigate the seismic behavior of high-rise reinforced concrete buildings with irregular shapes in the vertical and horizontal directions. The irregular shape of high-rise buildings has an effect on their ability to withstand earthquake loads. Due to limited area and aesthetic concerns, high-rise buildings are frequently designed without regard for irregular shapes. This study employs a 12-story structure with two different types of horizontal irregularities, namely T and U-shaped. Each horizontal irregularity has five vertical irregularity variations, for a total of ten models in this study. The frame structure was analyzed using the non-linear dynamics time history analysis software STERA 3D. Three earthquake data sets were used to generate seismic load variations for each model: the El-Centro, Kobe, and Parkfield earthquakes. The seismic behavior of the building investigated in this study included shear force, lateral deformation, stiffness of the structure, the relationship between base shear force and deformation, drift ratio, and maximum acceleration. The numerical analysis results indicate that each model behaves differently when subjected to the same seismic load and input material quality. Thus, the irregularity of the horizontal and vertical directions has a significant effect on the seismic behavior of high-rise reinforced concrete buildings.

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