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Husainy, Zainuddin
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering

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TINJAUAN ULANG PERHITUNGAN PENULANGAN STRUKTUR BETON BERTULANG PADA GEDUNG BANK NTB SYARIAH MENGGUNAKAN METODE SNI 2847:2019 Husainy, Zainuddin; Nafi, Aunun
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4018

Abstract

Ruang Publik Kreatif (RPK) is an open area located at the Sumbawa University of Technology (UTS) which is used for many outdoor activities. The RPK Hall was built with steel portal construction so it was deemed necessary to check the strength of the structure to ensure that it had a safe truss structure. Calculations for the truss structure will use the Frame3DD application which is much lighter than other structural calculation applications. This research resulted in a recommendation to replace CNP 100 profile curtains with CNP 150 profile curtains because the installed profile did not comply with the deflection limit and allowable moment limit. 2. Installed truss profile changed from WF250x125x6x9 to WF298x149x5.5x8 on elements 1 and 8, WF200x100x5.5x8 to WF298x149x5.5x8 on elements 2 and 7, WF100x50x5x7 to WF150x75x5x7 on elements 3 and 6, WF10 0x50x5x7 becomes WF125x60x6x8 on elements 4 and 5, and WF250x125x6x9 became WF200x100x5.5x8, and all of them resulted in at least a 29% increase in raw material costs from the initial RPK construction budget.
ANALISIS BIAYA DAN WAKTU PADA PROYEK PENINGKATAN JALAN DENGAN METODE EARNED VALUE Fardila, Dinda; R Kamagi, Siti Nurholisa; Ali Topan, Paris; Husainy, Zainuddin
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4044

Abstract

Cost and time are important variables in a construction project. Significant cost and time deviations can indicate poor project management, so there is a need for evaluation and control regarding this matter. In this research, researchers evaluated costs and time using the Earned Value Concept method. Performance evaluation of time and cost was carried out using Microsoft Project. Cost performance using the Earned Value Method means that there is a cost overrun of IDR 1,206,432.85 from the total construction budget plan (overbudget). This is shown by the EAC (Estimate to Complete) value of IDR 11,536,477,946.05 which is greater than the BAC (Budgeted All Construction) value of IDR 11,535,271,513. Performance when using the Earned Value Method has SV values ??in the July-October period showing positive values, namely IDR 175,140,527.07, IDR 175,138,345.20, IDR 175,140,527.07, IDR 32,838,848.83, this value shows that the project was realized faster than planned. Performance based on the schedule productivity index (SPI) in the July period has a value of 1.037894631, August has a value of 1.02648206, September has a value of 1.019104588, and October has a value of 1.002926831. This SPI value shows >1, meaning that the realized work productivity is carried out faster than the planned schedule.
PENGGUNAAN ABU SEKAM PADI SEBAGAI MATERIAL PENGGANTI PASIR PADA PENGUJIAN KUAT TEKAN BETON Husainy, Zainuddin; Suryaningsih, Oktavia
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5437

Abstract

The use of rice husk ash as a substitute material for sand with a percentage of rice husk ash addition of 5%, 7.5% and 10% with the aim of determining the optimal percentage of the use of rice husk ash from the volume of sand with concrete without using additional rice husk ash or normal concrete and the age of the planned concrete to be tested for compressive strength is 7 days, 14 days and 21 days. The results obtained from this test showed that the compressive strength value of normal concrete at the age of 7 days had reached the targeted average compressive strength as well as the ages of 14 and 21 days had achieved the desired results. While concrete with a mixture of rice husk ash at the age of 7 days at each percentage did not reach the targeted average value, the highest value obtained was 16.59 with a mixture of rice husk ash as much as 7.5% of the weight of the sand as well as at the age of concrete with a mixture of rice husk ash with a concrete age of 14 days has not reached the desired value with the highest value of 19.70 from 7.5% of the mixture of rice husk ash from the weight value of sand. While concrete with a mixture of rice husk ash at the age of 21 days only one percentage of the mixture of rice husk ash can reach the desired average value of 21.12 from 7.5% of the mixture of rice husk ash from the total weight of sand.
TINJAUAN ULANG PERHITUNGAN PENULANGAN STRUKTUR BETON BERTULANG PADA GEDUNG BANK NTB SYARIAH MENGGUNAKAN METODE SNI 2847:2019 Husainy, Zainuddin
Hexagon Vol 4 No 2 (2023): HEXAGON - Edisi 8
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v4i2.3078

Abstract

Bangunan Bank NTB Syariah KCP Alas - Sumbawa merupakan bangunan gedung yang terletak di Kecamatan Alas, Kabupaten Sumbawa. Sumbawa termasuk dalam zona gempa sedang, untuk itu dilakukan perhitungan ulang struktur gedung 2 lantai Bank NTB Syariah KCP Alas - Sumbawa dengan memperhitungkan parameter gaya gempa. Perhitungan Struktur Gedung 2 Lantai Bank NTB Syariah KCP Alas - Sumbawa ini bertujuan untuk menganalisa gaya geser dasar, output gaya dalam, dan penulangan struktur bangunan gedung. Pemodelan struktur menggunakan bantuan program analisa struktur SAP2000. Dimensi struktur utama yang digunakan adalah dimensi eksisting bangunan yaitu plat dengan tebal 12 cm dan 10 cm, balok induk 25×40 cm, balok anak 20×30 cm, kolom K1 40×40 cm, K2 25×25 cm. Dari analisa stuktur lokasi gedung termasuk dalam KDS C sehingga gedung direncanakan dengan Sistem Rangka Pemikul Momen Khusus (SRPMK). Setelah dilakukan desain penulangan secara manual didapat dimensi tulangan struktur utama gedung yaitu beberapa macam tipe balok dan sloof dengan mutu beton fc’ = 25 MPa atau setara dengan K-300, di antaranya adalah balok B1-400.600, B2-250.500, B3-250.400, B4-200.300, B5-130.200, B6-200.400, B7150.200, S1-250.500, S2-200.300, S3-200.400 & S4-150.300. Plat terdapat beberapa tipe, yaitu tipe S1 t=120 mm (tulangan 2 lapis), plat type S2 t=120 mm (tulangan 1 lapis), plat type S3 t=100 mm (tulangan 2 lapis).
PERBANDINGAN PERHITUNGAN PERPINDAHAN PANAS PADA PERISAI DENGAN MENGGUNAKAN METODE ELEMEN HINGGA DAN METODE SELISIH HINGGA Husainy, Zainuddin; Fardilla, Dinda
Hexagon Vol 6 No 1 (2025): HEXAGON - Edisi 11
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i1.5747

Abstract

The presented journal concerns calculations of heat transfer in a shield with use of two methods: finite element method and finite difference method. The comparison of heat transfer calculation of the selected problem is performed for a rectangular isotropic shield with the dimensions of 6 m x 4 m, with a rectangular hole with the dimensions of 2 m x 1 m. The shield was divided into 0.25 m x 0.25 m rectangular elements and 0.25 m x 0.25 m triangular elements for calculations in the finite element method and 0.25 m x 0.25 m rectangular elements for calculation in the finite difference method. The rectangular finite element model has 404 nodes, 352 elements, while the triangular finite element model has 404 nodes, 704 elements; the finite difference model has 445 nodes. Heat conductivity coefficients for the shield are 1.2 W·m–1·K–1 in both x and y directions. Prescribed boundary conditions are: top edge temperature 43 °C, bottom edge temperature 3 °C, left edge convection heat transfer coefficient a = 2.3 W·m–2 and ambient temperature Ta = 47 °C, right edge radiation heat flux density q = 3.8 W·m–2, 4 insulated hole edges. The shield has 2 point heat discharges: 5 W located in the point with coordinates (0.5 m, 0.5 m) and 11 W located in the point with coordinates (5.0 m, 1.0 m). The shield thickness is 1 m. The results of calculations are presented in 3 graphs in the form of contour maps. The comparison shows that the results given by the finite element method with use of the rectangular finite elements and triangular finite elements as well as by the finite difference method are similar which allows to conclude that the calculation results are trustworthy and have been done correctly. It is also confirmed by the energetic balance performed for the finite element method.
Co-Authors Ali Topan, Paris Fardila, Dinda Fardilla, Dinda Nafi, Aunun R Kamagi, Siti Nurholisa Suryaningsih, Oktavia