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All Journal Journal of Civil Engineering Jurnal Aplikasi Teknik Sipil
Mudji Irmawan
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Civil Engineering, Building, Construction & Architecture

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Strength Reduction Factor of Square Reinforced Concrete Column Using Monte Carlo Simulation Wahyuniarsih Sutrisno; Bambang Piscesa; Mudji Irmawan
Journal of Civil Engineering Vol 35, No 2 (2020)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i2.8657

Abstract

This paper investigates the strength reduction factor (f) of reinforced concrete (RC) columns using Monte-Carlo simulation (MCS). The main objective of this paper is to evaluate the strength reduction factor of the RC using the authors' developed code. This code is important for further research to check other important effects when high-strength materials are used. The investigated RC column concrete compressive strengths (fc) are 40 and 60 MPa while the rebar strengths (fy) are set to 320, 400, and 500 MPa. Fiber-based cross-sectional analysis is used to compute the axial-moment interaction capacity of the RC column. The concrete compressive block is used to model the concrete contribution and the bilinear stress-strain model is adopted for the rebar. These simplifications can reduce the difficulties when solving the equilibrium of the forces in the sectional analysis. The parameters used in the sensitivity analysis of the strength reduction factor (f) are the concrete compressive strength (fc), the rebar yield strength (fy), the longitudinal rebar ratio (r), and the column size (b,h). The effect of the coefficient of variations for each material on the resistance variation coefficient of the RC is also investigated. From the analysis, it can be concluded that when the RC column falls in the tension-controlled region, the obtained strength reduction factor is 0.93 which is slightly higher than the value of f in ACI 318-19. On the other hand, when the RC column falls in the compression-controlled region, the obtained strength reduction factor is 0.6 which is lower than the value of f in ACI 318-19 which is 0.65.
Evaluasi Struktur Bangunan Gedung Beton Bertulang Berusia 50 Tahun Bedasarkan SNI 1726 2012 dan SNI 2847 2013 Afif Navir Refani; Harun Alrasyid; Mudji Irmawan
Jurnal Aplikasi Teknik Sipil Vol 13, No 2 (2015)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2112.259 KB) | DOI: 10.12962/j12345678.v13i2.1586

Abstract

Penelitian ini membahas penilaian bangunan beton bertulang yang berusia 50 tahun berdasarkan standar perencanaan bangunan terbaru. Studi kasus yang dipakai adalah gedung Cipta yang terletak di Merdeka Barat, Jakarta. Survei lapangan dan uji laboratorium dilakukan untuk mengamati kondisi terkini dari struktur bangunan. Satu tes destruktif dan tiga tes non-destruktif dilakukan untuk mendapatkan kekuatan tekan beton aktual dan jumlah tulangan yang terpasang dalam elemen struktur. Berdasarkan kekuatan material eksisting, analisis struktur 3 dimensi yang diterapkan untuk mengevaluasi kekuatan nominal elemen beton bertulang. Dalam penilaian ini, gedung Cipta dievaluasi berdasarkan persyaratan struktur rangka pemikul momen khusus. Hasil pengamatan menunjukkan bahwa bangunan Cipta masih aman untuk menahan beban gravitasi. Disisi lain, struktur bangunan ini tidak memenuhi persyaratan untuk struktur rangka pemikul momen khusus. Penelitian ini menunjukkan bahwa bangunan beton yang berusia 50 tahun diperkuat hanya didesain untuk beban gravitasi.
Co-Authors Afif Navir Refani Bambang Piscesa Harun Alrasyid Wahyuniarsih Sutrisno