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All Journal Prokons: Jurnal Teknik Sipil
Sugiharti ,
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Materials Science & Nanotechnology

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KAJIAN PENGGUNAAN BETON PRACETAK PADA PROYEK PEMBANGUNAN RUSUNAWA (Studi Kasus Pembangunan Rusunawa POLDA JATIM-Surabaya) Sugiharti ,
Prokons: Jurnal Teknik Sipil Vol. 8 No. 1 February 2014
Publisher : Jurusan Teknik Sipil, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/prokons.v8i1.59

Abstract

The use of precast concrete is planned on work structure tie beam, columns, beams, and slab for precast systems have the advantage in terms time and cost efficiency compared to conventional systems (cast in place) to reach the targets that have been planned by the government.The purpose is to find out the cost efficiency and time usage precast. The cost analysis was obtained from the multiplication of bill of quantity and the work volume. To find a network using the Precedence Diagram Method (PDM) which was processed through Microsoft Project 2007 software then arranged in Bar Chart. The Bar Chart was arranged in the S-Curve with Microsoft Excel 2007 software. From the calculations, total project cost is IDR 13,300,074,303.07 with the cost efficiency IDR 604,137,428.00 or 4.34% less than the conventional method and the duration is 214 days with the time efficiensy 86 workdays or 28.67% quicker than the conventional method.Keywords: pre-cast concrete, cost, time, efficiency
Pengaruh Perawatan terhadap Kuat Tekan Pada Beton Mutu Tinggi Dengan Menggunakan Fly Ash Sugiharti ,
Prokons: Jurnal Teknik Sipil Vol. 6 No. 1 February 2012
Publisher : Jurusan Teknik Sipil, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/prokons.v6i1.14

Abstract

TINJAUAN LEBAR RETAK PADA PELAT BETON AKIBAT BEBAN STATIS Sugiharti ,
Prokons: Jurnal Teknik Sipil Vol. 7 No. 2 August 2013
Publisher : Jurusan Teknik Sipil, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/prokons.v7i2.44

Abstract

Inspection of crack width prediction procedures proposed by various investigators indicates that each formula contains a different set of variables. A literature review also suggests that there is no general agreement among various investigators on the relative significance of different variables affecting the crack width, despite the large number of experimental work carried out during the past few decades. An analytical method is developed to determine the concrete stress distribution near flexural cracks in reinforced concrete one-way slabs and used to investigate the effects of various variables on the spacing and width of cracks. The formula is developed using a large number of curvature values calculated from the concrete and steel strains at various sections between adjacent cracks for a number of composite precast deck slabs. The present method of incorporating the tension stiffening effect is verified by comparing calculated fracture mechanic and those measured by other investigators. The curvature values at sections between adjacent cracks are calculated using an empirical formula. Development of this formula is based on the curvature values calculated using the concrete and steel strains at various sections between successive cracks, for a number of slabs. Using the curvature values evaluated by the proposed formula, short-term deflections were determined for a large number of flexural members and the results were compared with those measured by other investigators. This comparison indicated that the present method of incorporating the tension stiffening effect in fracture mechanic calculations is acceptable. Keywords: crack width; formula; fracture mechanic; deflection.
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