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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains JPPUMA: Jurnal Ilmu Pemerintahan dan Sosial Politik Universitas Medan Area
Wahyu Rahmadhan, Wahyu
Program Studi Ilmu Kepemerintahan, Fakultas Ilmu Sosial dan Ilmu Politik Universitas Medan Area
Civil Engineering, Building, Construction & Architecture Engineering Social Sciences

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Prosedur Penerbitan Surat Izin Belajar Pegawai Negeri Sipil di Lingkungan Pemerintahan Deli Serdang Rahmadhan, Wahyu; Aswin Hasibuan, Muhaamad; Wal Hidayat, Taufik
JPPUMA: Jurnal Ilmu Pemerintahan dan Sosial Politik Universitas Medan Area Vol 1, No 2 (2013): JPPUMA DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.065 KB)

Abstract

Penelitian ini bertujuan untuk mengetahui tentang prosedur penerbitan surat izin belajar pegawai negeri sipil di lingkungan pemerintahan Deli Serdang. Izin belajar ini berfungsi untuk meningkatkan kualitas sumber daya aparatur untuk terwujudnya peningkatan keahlian dan profesionalitas PNS dalam bidang ilmu/keahlian tertentu serta memberikan pedoman dan kepastian hukum terhadap pelaksanaan peningkatan jenjang pendidikan bagi PNS agar mampu memberikan pelayanan yang lebih baik kepada masyarakat yang dibutuhkan bagi perkembangan dan kemajuan negara khususnya Pemerintah Kabupaten Deli Serdang. Hasil penelitian, didapat bahwa proses implementasi kebijakan pemberian Izin Belajar dan Tugas Belajar, bagi PNS di lingkungan Pemerintah Kabupaten Deli Serdang tidak berjalan sesuai ketentuan yang berlaku, dikarenakan di lapangan masih ada penyimpangan oleh PNS yang melanjutkan pendidikan selanjutnya serta belum memenuhi persyaratan dan prosedur yang telah ditetapkan dalam kebijakan tersebut sebelum yang bersangkutan melaksanakan/ melanjutkan pendidikan
Pemodelan Perilaku Tegangan Dan Regangan Beton Saat Terbakar Rahmadhan, Wahyu; Kamaldi, Alfian; Suryanita, Reni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Concrete exposed to high temperatures decrease its strength. Droped down in concrete strength under strength requirement will make the concrete fail to be functioned. The strength of the concrete can be determined from laboratory test, or mathematic model based on the results from experimental test. This study aims to identify the behavior of the stress and strain of the concrete exposed to high temperatures. The model was carried at using Finite Element Software LUSAS and the results compared to mathematic model proposed by Li and Purkiss (2005) and Chang (2006). The speciment used in this study was cylindrical with diameter of 150 mm and height of 300 mm with a 25 MPa of the concrete strength. The model was simulated burning with a constant temperature that varied from 100°C to 800°C. The result showed that strain stress curve shown from the empirical formula has an elastic phase of 0.6f'c, while modeling based LUSAS has an elasticity phase of 0.45 f'c. The difference between the elastic and plastic phases in the LUSAS model was clearly visible according to the temperature of the concrete, while the models using the empirical formula were not affected by temperature. It can concluded that empirical formula model and LUSAS can be used as a reference for the behavior of concrete when exposed to high temperatures.Keywords : modeling, high temperature, stress, strain, LUSAS
Pemodelan Perilaku Tegangan dan Regangan Beton pada Suhu Tinggi dengan Software LUSAS Suryanita, Reni; Rahmadhan, Wahyu; Kamaldi, Alfian
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 25, Nomor 1, JULI 2019
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (767.458 KB) | DOI: 10.14710/mkts.v25i1.20575

Abstract

The concrete structure exposed to high temperatures can affect the strength of the structure. Limitations in the experimental method can be solved by mathematical modeling. This study aims to identify the stress and strain behavior that occurs at high-temperatures. The model is a cylindrical concrete with a diameter of 150 mm and a height of 300 mm. The concrete strength design is 25 MPa. The temperatures of the model are 100 °C, 200 °C, 300 °C, 400 °C, 500 °C, 600 °C, and 700 °C. The model analysis using LUSAS v. 16 Software to observe the properties of the concrete material due to exposure to high temperatures. The results of the study get the higher the temperature received by concrete, the strength of the concrete decreases. Concrete that burned to a temperature of 300 °C still had 82% available power, and at a temperature of 700 °C, the remaining concrete strength was 30%. The strain increases to 423% from normal conditions at a temperature of 700 ° C. Therefore, the results of the study can be used as a reference for structural engineers to know the behavior of the concrete that exposure to high temperatures.
Co-Authors Kamaldi, Alfian Muhaamad Aswin Hasibuan, Muhaamad Reni Suryanita Taufik Wal Hidayat, Taufik