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All Journal Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan KERN : Jurnal Ilmiah Teknik Sipil Journal of Civil Engineering and Vocational Education
Astawa, Made Dharma
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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ANALISIS KINERJA STRUKTUR RANGKA GEDUNG DENGAN PERKUATAN DIAFRAGMA PELAT LANTAI PADA RSUD SURABAYA TIMUR Larasati, Andra Putri; Astawa, Made Dharma; Kartini, Wahyu
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 12 No. 2 (2024): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v12i2.559

Abstract

Indonesia merupakan negara yang rawan mengalami gempa karena letak geografisnya yang terletak pada pertemuan 3 lempek tektonik, oleh karena itu, dalam perencanaan suatu bangunan harus didesain tahan terhadap gempa. Salah satu cara yang dilakukan adalah dengan merencanakan struktur dengan perkuatan diafragma pelat lantai. Diafragma pelat lantai didesain untuk menerima beban lateral dan mentransfer gaya lateral tersebut ke elemen penahan gaya lateral seperti dinding geser dan kolom. Diafragma pelat lantai diharapkan mampu memberikan tahanan lateral kepada struktur dengan membuat struktur tersebut berperilaku daktail. Struktur yang daktail merupakan struktur yang dapat berdeformasi inelastis tanpa mengalami keruntuhan total dan mampu mengembangkan sendi-sendi plastis yang dapat menyerap beban yang diterima oleh struktur. Perilaku inelastis bangunan ditunjukkan dalam kapasitas daktilitas dan beban. Kapasitas dan beban ditunjukkan dari kurva yang didapat dari analisis pushover. Analisis pushover digunakan untuk menetapkan parameter kapasitas inelastis. Dari hasil analisis struktur, simpangan yang terjadi tidak melebihi simpangan izin, tidak terdapat ketidakberaturan horizontal dan vertikal, efek P-Delta telah memenuhi kriteria, dan level kinerja struktur adalah Immediate Occupancy. Namun, daktilitas struktur masih terbilang rendah.
Pemanfaatan Limbah Plastik HDPE Sebagai Pengganti Agregat Kasar Tertentu Pada Campuran Beton Ringan Wardana, Afif Kusuma; Kartini, Wahyu; Astawa, Made Dharma
KERN : Jurnal Ilmiah Teknik Sipil Vol. 7 No. 2: Oktober 2021
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/kern.v7i2.45

Abstract

ABSTRAK Beton ringan merupakan pengembangan ilmu pengetahuan dari teknologi material, salah satu inovasi pengembangan beton ringan dengan memanfaatkan plastik HDPE ke dalam campuran beton. Plastik HDPE merupakan jenis polimer yang memiliki tingkat kerapatan tinggi yang bersifat fleksibel, tahan terhadap benturan, tahan terhadap temperatur rendah, dan berat jenis plastik HDPE tergolong ringan yaitu sebesar 941-965 kg/m3, Penelitian ini dilakukan dengan menggunakan metode trial and test dengan faktor air semen yang direncanakan 0,5 dan slump yang direncanakan 75-100 mm. Variasi subtitusi parsial agregat kasar plastik HDPE sebesar 75%, 80%, 85%, dan 90% dari volume agregat kasar. variasi HDPE 75% kuat tekan yang didapatkan sebesar 9.805 Mpa, didapatkan nilai porositas 10,90%, serta nilai modulus elastisitas 10824,4154 MPa. Pada variasi HDPE 80% yakni kuat tekan sebesar 9,710 MPa mengalami penurunan 0.969%, didapatkan nilai porositas 11,10% mengalami peningkatan 1,83%, serta nilai modulus elastisitas 9910,7767 MPa. Pada variasi HDPE 85% kuat tekan yang didapatkan sebesar 8,862 MPa mengalami penurunan 9.618%, didapatkan nilai porositas 11,62% mengalami peningkatan 6,61%, serta nilai modulus elastisitas 9275,862 MPa. Pada variasi HDPE 90% kuat tekan yang didapatkan sebesar 8,013 MPa mengalami penurunan 18,276%, didapatkan nilai porositas 11,91% mengalami peningkatan 9,27%, serta nilai modulus elastisitas 8749,4147 MPa. Secara umum dengan bertambahnya agregat ringan kualitas beton ringan mengalami penurunan baik kuat tekan, porositas maupun modulus elastisitas sehingga nilai optimum pada penelitian beton ringan dengan subtitusi agregat ringan plastik HDPE yakni pada variasi 75%.
The Effectiveness of Added Admixture Additon Superfluid L with the Reduction of Cement and Water Contents on Concrete Characteristics Huda, M. Miftachul; Kartini, Wahyu; Astawa, Made Dharma
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.8

Abstract

ABSTRACT Concrete is a complex-composite material. Semen Portland or other hydraulic types of cements, fine aggregates, coarse aggregates, and water, with or without additional substance, are the major materials in making concretes. In this time, the concrete cost more expensive, despite of many infrastructure development that caused higher concretes demand, the increased of concretes cost also caused by the cements high-price as a result of higher PPN value 11% for cement production cost. Cement is highly affected the concrete cost, it is because cement is the major material in forming the concrete that is more expensive than other types of materials. Therefore, it is important to reduce the cement content to press the cost of concrete. This study done by utilizing the variation of added admixture additon superfluid L to reduce the use of cement and water contents by using trial and test method, and slump that was planned 10±2 cm. The reduction of cement for about 5% and 10% from the total weight of cement also there are 4 added variation of content of admixture additon superfluid L, they are 0.5%, 1.0%, 1.5%, dan 2.0% from the cement weight with FAS still about 0,5. According to the test of concrete characteristics such as compressive strength testing, porocity testing, and elastic modulus testing, generally by having more PSA and admixture additon superfluid L, the quality of concrete getting lower from the view of compressive strenght, porocity,or even elastic modulus. There was concrete mixture configuration while it was 28 days, the most effective variation of reduction cement and water content, also the added admixture additon superfluid L 0,5% that possess compressive strenght value around 26,328 MPa ; porocity value around 11,11% ; elastic modulus value about 21950,49 MPa and poisson rasio value around 0,21179. Key Words: water content; cement content; admixture; concrete characteristics.
Alternative Design of Menara 17 Structure in Surabaya with Castellated Steel Beam Febriawan, Mochamad Rizaldi; Astawa, Made Dharma; Sumaidi, Sumaidi
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.15

Abstract

Assigning structural material is one of critical step in designing, steel material often used because of it high ductility. Menara 17 is a 17 storey multipurpose building with reinforced concrete as an existing material structure. This research analyze Menara 17 alternative design with Special Moment Frame (SMF) steel structure to resist lateral load with high ductility and expected to withstand significant inelastic deformation. Castellated beam is used to increase it capacity to weight ratio and ease MEP installation through the opening. SNI and AISC is used for main design guide. From the analysis result, the alternative design has satisfy criteria of irregularity, P-delta effect, story drift, and Strong Column Weak Beam. Honeycomb castellated beam HCO 520.250.9.14 profile is used as main beam. King-cross column KC 800.400.16.30 profile is used as main column. Circular hollow section CHS 406,4.40 profile is used as diagonal bracing. Wide flange WF 200.200.8.12 profile is used as lateral bracing. Lateral bracing to beam is connected with shear connection. Beam to column is connected with endplate moment connection. Menara 17 design with steel structure is 59,17% less heavy than reinforced concrete structure.
Co-Authors Febriawan, Mochamad Rizaldi Huda, M. Miftachul Kartini, Wahyu Kartini Larasati, Andra Putri Sumaidi Sumaidi, Sumaidi Wahyu Kartini Wardana, Afif Kusuma