Article Per Year (5 Year)
p-Index From 2021 - 2026
2.844
P-Index
This Author published in this journals
All Journal Media Teknik Sipil MEDIA KOMUNIKASI TEKNIK SIPIL Sinergi Rekayasa Sipil Semesta Teknika Teknisia Jurnal Teknik Sipil Bangunan Jurnal Rekayasa Sipil Journal of the Civil Engineering Forum Dinamisia: Jurnal Pengabdian Kepada Masyarakat Jurnal Aplikasi Teknik Sipil Jurnal Riset Rekayasa Sipil Publikasi Riset Orientasi Teknik Sipil (Proteksi) Journal of Civil Engineering and Planning (JCEP) Bulletin of Civil Engineering Andalasian International Journal of Applied Science, Engineering, and Technology Universitas Muhammadiyah Yogyakarta Undergraduate Conference Proceeding Prosiding Seminar Nasional Program Pengabdian Masyarakat Journal of the Civil Engineering Forum Jurnal Penelitian Transportasi Darat
Hakas Prayuda
Universitas Muhammadiyah Yogyakarta
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Transportation Other

Published : 49 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 17 Documents
Search
Journal : Semesta Teknika

 1   2 
Strategi Penawaran dalam Industri Konstruksi (Studi Kasus di Layanan Pengadaan Secara Elektronik, Kota Bandung) Hakas Prayuda, Mandiyo Priyo ,
Jurnal Semesta Teknika Vol 16, No 1 (2013): MEI 2013
Publisher : Jurnal Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aims of this research are to calculate the value of mark-up using bidding strategy approach and to determine the best bidding strategy to win a tender with the optimum mark-up value and the optimum profit. The data being used in this research are auction data that have been completed in 2010-2012 at LPSE Bandung using statistical approach namely discrete multi distribution, normal multi distribution, and single normal distribution. Bidding strategy methods being used are Friedman Method, Gates Method, and Ackoff & Sasieni Method. The Friedman Method can generate an optimum mark-up of 10% with expected profit of -0.0014, an optimum mark-up of -9% with expected profit of -0.0003, and an optimum mark-up of -1%  with expected profit -0.0004 for discrete multi-distribution, multi-normal distribution, and  single normal distribution, respectively. The Gates Methods can produce an optimum mark up of 6% with expected profit of 1,5000, an optimum mark up of 5% with expected profit 0.0097, and an optimum mark up of 6% with expected profit 1.2888 for discrete multi distribution, multi-normal distribution, and single normal distribution, respectively. While the Ackoff & Sasieni Methods can generates an optimum mark-up of -2%  with expected profit -0.0003, an optimum mark-up of  1% with expected profit for 0,0013 for discrete multi distribution, and for both multi and single normal distributions, respectively.
Pengaruh Variasi Bahan Tambah Abu Sekam Padi dan Zat Adiktif Bestmittel 0,5% Terhadap Kuat Tekan Beton Mutu Tinggi Nugraha, Yoga; Prayuda, Hakas; Saleh, Fadillawaty
Semesta Teknika Vol 20, No 2 (2017): NOVEMBER 2017
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Concrete is the mixture of portland cement or hidrolyc cement, fine aggregate, coarse aggregate and water with or without additional mixture to form solid mass. The use of cement makes the concrete price more expensive, so an innovation is needed which to be use natural additive, such as rice husk ash. This research was carried by decreasing the use of cement that was replaced by rice husk ash with the variation 5%, 10%, and 15%, and 0.5% additive material (bestmittel) of the cement. Cylinder samples with the diameter of 15 cm and heigth of 30 cm were tested at the age of 28 days. The result of this research shows that the compresssive strength of the concrete was affected by the additional of rice husk ash (RHA) and additive material (bestmittel), which decrease the compressive strength every additional rice husk ash. The use of rice husk ash and bestmittel on the concrete for 3 variation which were 5 % ; 10% ; and 15% with the additive (bestmittel) 0.5%  obtained compressive strength were 32,23MPa; 31,84MPa and 27,71MPa.
Pengaruh Penambahan Pecahan Kaca Sebagai Bahan Pengganti Agregat Halus dan Penambahan Fiber Optik Terhadap Kuat Tekan Beton Serat Ikhsan, Muhammad Nur; Prayuda, Hakas; Saleh, Fadillawaty
Semesta Teknika Vol 19, No 2 (2016): NOVEMBER 2016
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fibre concrete is an innovation of normal concrete to special concrete to be stronger withstands the tensile force. Fibre concrete consists of cement, water, fine aggregate, coarse aggregate and additional fibre materials. The addition of fibre is expected to reduce the segragation and prevent cracks of the concrete. In this research used additional glass fracture with variation of 15%, 20%, 25% to the weight of the fine aggregate as well as additional of optic fibre of 0,15% of the concrete’s weight. Their compressive strength was examined at the age of 28 days. The result is gained by adding 15% of glass fracture 24,94 MPa with modulus of elasticity 23471,8 MPa, addition of 20% gained the result of compressive strength by 25,48 MPa with modulus of elasticity 23724,5 MPa, meanwhile by adding glass fracture 25% gained the result of compressive strength 25,77 MPa with modulus of elasticity 23859,2 Mpa.
Kuat Tekan Beton Serat Menggunakan Variasi Fibre Optic dan Pecahan Kaca Pratiwi, Sustika; Prayuda, Hakas; Prayuda, Fadillawaty
Semesta Teknika Vol 19, No 1 (2016): MEI 2016
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fibre concrete is one of special concretes which developed from normal concrete by adding fibre into concrete mortar. It aims at preventing crack of loading, heat hydrating as well as depreciation and to increase the stress force, bent force, and tensile force. In this research used the fibre optic which is a synthetic fibre obtained from the inside of optic cable. Glass is a material which is easy to find and has an economic value, beside that glass also has excellent resistance of abrasion, weather or chemical attack. This research uses three variations of fibre grade that are 0,1%; 0,15%; 0,2% with the length 10 cm obtained from concrete weight, while glass fracture that used is 20% of sand weight. Average Compressive strength   of fibre addition consecutively 22,43 MPa; 24,31 MPa and 29,63 MPa. Compressive strength increased with the increasing number of fibre.
Gaya Lateral In-Plane Struktur Portal Dinding Pasangan Bata ½ Batu Melalui Analisis Numerik Prayuda, Hakas
Semesta Teknika Vol 18, No 2 (2015): NOVEMBER 2015
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Building construction in Indonesia is categorized as two big classes; there are engineered building and non-engineered building. Non-engineered building is very susceptible to the lateral load such as an earthquake, either medium earthquake or massive earthquake that causing sudden collapse so that the research of mitigation building strength needs to be done which is rely on the strength of brick masonry (non-engineered building) that can be predicted through measuring micro vibration at the bottom and the top of the brick masonry wall surface. The aims of this research is to find out the effect of ½ stone brick masonry in its contribution to the rigidity of simple portal structure by using loading in-plane lateral system. Loading analysis result at the plastic limit is 95, 524 kN or only 86,89% of the maximum load, meanwhile lateral deviation at the plastic limit is 7,506 cm or 27,51% of maximum lateral deviation. Besides, The rigidity of ½ stone brick masonry wall is 12,72 kN/cm.
KUAT TEKAN BETON DAN NILAI PENYERAPAN DENGAN VARIASI PERAWATAN PERENDAMAN AIR LAUT DAN AIR SUNGAI Pujianto, As'at; Prayuda, Hakas; Zega, Berkat Cipta; Afriandini, Besty
Semesta Teknika Vol 22, No 2 (2019): NOVEMBER 2019
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini membahas pengaruh dari perawatan beton menggunakan air laut dan air sungai terhadap karakteristik beton. Tujuan dari penelitian ini untuk menjelaskan pengaruh dari jenis air pada perawatan beton, khususnya pada beton yang digunakan yang berhubungan langsung dengan air. Pada penelitian ini menggunakan tiga jenis produk semen yaitu Holcim, Tiga Roda dan Gresik dengan total 12 variasi dan 108 benda uji berbentuk silinder berdiameter 15 cm dan tinggi 30 cm. Seluruh variasi menggunakan standar mix design yang sama dengan 6 variasi menggunakan perbedaan jumlah superplasticizer dan 6 variasi menggunakan bahan tambah fly ash. Pengujian yang dilakukan berupa pemeriksaan workabilitas, kuat tekan dan nilai penyerapan. Hasil pada pengujian ini menunjukkan bahwa nilai workabilitas pada beton menggunakan superplasticizer lebih baik dibandingkan beton menggunakan bahan tambah fly ash. Hasil kuat tekan menunjukkan bahwa seluruh benda uji dengan perawatan air laut lebih tinggi dibandingkan dengan beton menggunakan perawatan air sungai. Sedangkan nilai penyerapan menunjukkan bahwa pada umur 28 hari dengan menggunakan air laut menghasilkan nilai yang lebih tinggi dibandingkan perawatan menggunakan air sungai. This study will discuss the effect of concrete treatment using sea water and river water on the characteristics of concrete. The purpose of this study was to determine the effect of water types in concrete treatment, especially for concrete used directly in contact with water. In this study three types of cement brands, Holcim, Tiga Roda and Gresik were used with a total variation of this study as many as 12 with the number of test specimens of 108 cylindrical concrete measuring 15cm in diameter and 30 cm in height. All variations use the same mix design and then modified with 6 variations using super-plasticizer added material while the remaining 6 variations use material added admixture in the form of fly ash which then carried out workability testing, compressive strength and percentage of absorption. The results of this study indicate that the level of concrete workability using superplasticizer added material is much better than using materials added by fly ash. The results of the compressive strength obtained showed that almost all specimens with soaking seawater had a higher compressive strength than concrete with treatment with river water. Absorption results show that at 28 days the seawater absorption rate is greater than river water.  
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

Abstract

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

Abstract

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.  
Kuat Tekan Beton dan Nilai Penyerapan dengan Variasi Perawatan Perendaman Air Laut dan Air Sungai Pujianto, As'at; Prayuda, Hakas; Zega, Berkat Cipta; Afriandini, Besty
Semesta Teknika Vol 22, No 2 (2019): NOVEMBER 2019
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.222243

Abstract

Penelitian ini membahas pengaruh dari perawatan beton menggunakan air laut dan air sungai terhadap karakteristik beton. Tujuan dari penelitian ini untuk menjelaskan pengaruh dari jenis air pada perawatan beton, khususnya pada beton yang digunakan yang berhubungan langsung dengan air. Pada penelitian ini menggunakan tiga jenis produk semen yaitu Holcim, Tiga Roda dan Gresik dengan total 12 variasi dan 108 benda uji berbentuk silinder berdiameter 15 cm dan tinggi 30 cm. Seluruh variasi menggunakan standar mix design yang sama dengan 6 variasi menggunakan perbedaan jumlah superplasticizer dan 6 variasi menggunakan bahan tambah fly ash. Pengujian yang dilakukan berupa pemeriksaan workabilitas, kuat tekan dan nilai penyerapan. Hasil pada pengujian ini menunjukkan bahwa nilai workabilitas pada beton menggunakan superplasticizer lebih baik dibandingkan beton menggunakan bahan tambah fly ash. Hasil kuat tekan menunjukkan bahwa seluruh benda uji dengan perawatan air laut lebih tinggi dibandingkan dengan beton menggunakan perawatan air sungai. Sedangkan nilai penyerapan menunjukkan bahwa pada umur 28 hari dengan menggunakan air laut menghasilkan nilai yang lebih tinggi dibandingkan perawatan menggunakan air sungai. This study will discuss the effect of concrete treatment using sea water and river water on the characteristics of concrete. The purpose of this study was to determine the effect of water types in concrete treatment, especially for concrete used directly in contact with water. In this study three types of cement brands, Holcim, Tiga Roda and Gresik were used with a total variation of this study as many as 12 with the number of test specimens of 108 cylindrical concrete measuring 15cm in diameter and 30 cm in height. All variations use the same mix design and then modified with 6 variations using super-plasticizer added material while the remaining 6 variations use material added admixture in the form of fly ash which then carried out workability testing, compressive strength and percentage of absorption. The results of this study indicate that the level of concrete workability using superplasticizer added material is much better than using materials added by fly ash. The results of the compressive strength obtained showed that almost all specimens with soaking seawater had a higher compressive strength than concrete with treatment with river water. Absorption results show that at 28 days the seawater absorption rate is greater than river water.  
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

Abstract

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.
Co-Authors Acep Widiyanto Afriandini, Besty Aji, Kartika Restu Al Fajir M Sarita Andi Herius Anita Rahmawati Aristyasari, Yunita Furi Arma Rizal Riyandar As'at Pujianto As’at Pujianto, As’at As’at Pujianto Bagus Soebandono Bella Lutfiani Al Zakina Berkat Cipta Zega Cahyati, Martyana Dwi Dodi Agusto Wijaya Eri Putra Siswantoro Erlinda, Risky Dwi Fadhila Firdausa Fadhila Firdausa Fadillawaty Prayuda Fadillawaty Saleh Fadillawaty Saleh Fadillawaty Saleh Fadillawaty Saleh Fadillawaty Saleh Fadillawaty Saleh, Fadillawaty Fattiha, Desti Lailatul Mufida Fauzan, Okta Marzantio Hanif Nursyahid Haq, Muhammad Mundzirul Hasibuan, Samsul A Rahman Sidik Hendy Wijaya Husna, Renita Ibrahim Ibrahim Ikhsan, Muhammad Nur Indra Bagus Kurniawan Istiawan, Istiawan Istiawan, Istiawan Junaidi Abdurazak Kholil Muqorrobin Lilis Tiyani M Fahrul Hidayat M. Yogi Riyantama Isjoni Martyana Dwi Cahyati Martyana Dwi Cahyati Moh. Ervianto Moh. Ervianto, Moh. Monika, Fanny Muhammad Imaduddin Muhammad Nur Ikhsan Nugraha, Yoga Ogata Wilasamba Paudel, Satish Pratiwi, Sustika Prayuda, Fadillawaty Pujianto, As'at Pujianto, As'at Purwanto Purwanto Putra, Firhan Mahreza Yunanto restu faizah Saleh, Fadillawaty Salsabila, Bella Saugani, Muh Sofyan Sinta Rizky Amalia Siti Solihah Soebandono, Bagus Sri Atmaja P. Rosyidi Sri Rezki Artini Sustika Pratiwi Talitha Zhafira Taufiq I. Maulana Taufiq Ilham Maulana Taufiq Ilham Maulana Taufiq Ilham Maulana Tiyani, Lilis Tri Ananda Putri Yanuar Ade Putra Yoga Nugraha