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All Journal Jurnal Ilmiah Kurva Teknik
I Wayan Giatmajaya
Program Studi Teknik Sipil Fakultas Teknik Universitas Mahasaraswati Denpasar
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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ANALISIS DAN PERENCANAAN STRUKTUR GEDUNG MENGGUNAKAN BALOK DAN PELAT BETON PRATEGANG I Gede Gegiranang Wiryadi; I Wayan Giatmajaya; I Putu Adi Sadu Gunawan
Jurnal Ilmiah Kurva Teknik Vol. 10 No. 1 (2021): Jurnal Ilmiah Kurva Teknik
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Mahasaraswati Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (532.682 KB) | DOI: 10.36733/jikt.v10i1.2140

Abstract

Beams and plates are the dominant structural elements that receive unidirectional loads, so it is possible to use a system of prestress compared to columns. In this study, the analysis and design of prestressed beams were carried out in a building that functions as a hospital and previously analyzed using ordinary reinforced concrete. Beams and plates use a composite system and a prestressive system. The beam and plate are analyzed in two stages, the production stage and the composite stage after being installed on site. At the production stage, the beam height is reduced by the plate thickness and the load is calculated only for the prestress force and the lifting process. While the composite stage or after being assembled into one with columns and plates, all forces are calculated based on all the working loads. The concrete compressive strength and the yield strength of reinforcement used are 35 MPa and 360 MPa, respectively, while the yield strength of prestressed cables is 1860 MPa. The total loss of pre-stress force is taken as 25% of the total pre-stress force. Three types of beams have a span of 8 m, namely 40 x 60 cm, 35 x 55 cm and 30 x 50 cm after the composite, while the plate thickness is 15 cm after the composite and 10 cm during production. The analysis results show that the stress that occurs in the concrete beam and slab during production and when the composite with a prestressed system does not exceed the allowable stress in accordance with regulatory provisions. So that the prestressed beams and plates with the prestressed system can be applied in a composite system to the building structure and do not exceed the allowable stress limit for receiving loads.
Analisis Riwayat Waktu Perilaku Struktur Gedung SMA Negeri 9 Denpasar I Gede Gegiranang Wiryadi; I Wayan Giatmajaya; I Putu Agus Putra Wirawan; Ni Made Trangipani
Jurnal Ilmiah Kurva Teknik Vol. 10 No. 2 (2021): Jurnal Ilmiah Kurva Teknik
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Mahasaraswati Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (606.174 KB) | DOI: 10.36733/jikt.v10i2.3000

Abstract

Indonesia memiliki ancaman gempa bumi yang cukup tinggi karena berada diatas tiga pertemuan lempeng tektonik yaitu lempeng Indo-Australia, Eurasia, dan Pasifik. Jika terjadi gempa bumi, dapat menimbulkan bahaya karena gempa tidak dapat diprediksi secara pasti. Oleh karena itu struktur bangunan harus direncanakan mampu memikul beban dan tahan gempa guna memperkecil risiko korban jiwa dan kerusakan. Struktur bangunan tahan gempa didasari oleh perencanaan yang baik dan sesuai dengan regulasi yang ada. Untuk mengetahui perilaku struktur terhadap gempa perlu dilakukan analisis. Pada penelitian ini dilakukan analisis dengan metode riwayat waktu pada Gedung Ruang Kelas SMAN 9 Denpasar. Analisis ini akan menggunakan tiga rekaman gempa yaitu gempa El-Centro, Kobe dan, Chichi. Dari hasil time history, simpangan antar tingkat arah x maupun y yang terjadi dari ketiga gempa tidak melebihi simpangan izin. Simpangan antar tingkat terbesar untuk gempa El Centro adalah 20,96 mm, untuk gempa Kobe yaitu 16,63 mm dan gempa Chichi sebesar 0,58 mm. Hasil gaya geser didapatkan diantaranya pada Gempa El Centro sebesar 567,739 kN, Kobe 695,680 kN, dan Chichi sebesar 24,320 kN di arah x dan pada arah y El Centro sebesar 556,531 kN, Kobe 716,402 kN, serta Chichi sebesar 22,100 kN.
Co-Authors I Gede Gegiranang Wiryadi I Putu Adi Sadu Gunawan I Putu Agus Putra Wirawan Ni Made Trangipani