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Faimun Faimun
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Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Analisa Perbandingan Metode Bottom-Up Dan Metode Top-Down Pekerjaan Basement Pada Gedung Parkir Apartemen Skyland City Education Park Bandung Dari Segi Biaya Dan Waktu Faimun Faimun; Cahyono Bintang Nurcahyo
Jurnal Teknik ITS Vol 4, No 1 (2015)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (680.459 KB) | DOI: 10.12962/j23373539.v4i1.8750

Abstract

Pembangunan basement yang dilakukan secara berurutan dari bawah ke atas yang dikenal dengan metode bottom-up sudah banyak diterapkan dalam pelaksanaan konstruksi basement. Pada metode ini pekerjaan dimulai dari pekerjaan pondasi, pekerjaan galian kemudian diteruskan dengan pembuatan kolom, balok, dan pelat yang menerus sampai ke atap. Seiring berkembangnya teknologi dan inovasi dibidang konstruksi terdapat alternatif metode konstruksi lain yang dapat digunakan untuk meningkatkan kualitas dan kuantitas kerja. Metode yang dapat diterapkan yaitu metode top-down. Pada metode ini pekerjaan basement dimulai dari basement yang teratas dan dilanjutkan lapis demi lapis sampai kedalaman basement yang diinginkan yang bersamaan dengan pekerjaan galian basement. Pekerjaan basement dapat simultan dengan pekerjaan struktur atas, sehingga waktu pelaksanaan dapat lebih singkat. Kedua metode konstruksi tersebut mempunyai perbedaan pada saat pengerjaan dan selama proses konstruksi yang berpengaruh terhadap biaya dan waktu. Tugas akhir ini adalah membandingkan metode konstruksi bottom-up dan top-down dari segi biaya dan waktu. Proyek yang djadikan objek penelitian adalah Pembangunan Gedung Parkir Apartemen Skyland City Education Park Bandung. Untuk kedua metode tersebut dilakukan studi pustaka dan pengumpulan data, analisa metode pelaksanaan, perhitungan kebutuhan material dan alat, analisa produktivitas dan durasi pekerjaan serta analisa perhitungan biaya. Dengan analisa perbandingan metode bottom-up dan top-down didapatkan hasil, metode bottom-up membutuhkan waktu pelaksanaan selama 313 hari dengan biaya sebesar Rp 20.146.074.654,00 dan metode top-down membutuhkan waktu pelaksanaan selama hari 260 dengan biaya sebesar Rp. 21.342.390.563,00
A Study on the Effects of Implementing Base Isolation System for Existing RC Buildings on Soft Soil Muhammad F. Firmansyah; Ahmad B. Habieba; Faimun Faimun
Journal of Civil Engineering Vol. 40 No. 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v40i1.7268

Abstract

The occurrence of earthquakes is frequent in Indonesia due to its position in a highly active tectonic zone. One approach to improve the seismic performance of existing buildings is through the use of base isolation. The concept of using base isolation systems aims to increase the natural period of structures and provide additional damping to reduce seismic forces on the structures. A comparative study was performed between a fixed base system and base isolated system in a 13-story reinforced concrete building located in Surabaya on soft soil. Subsequently, these models were evaluated for their structural response using the nonlinear time history analysis. The results demonstrate that the use of base isolation systems can significantly elongate the building’s natural period, resulting in a significant decrease in the base shear, acceleration response, drift, and the plastic hinge formed. This study proves that this technology is suitable to be applied to existing buildings with satisfactory results.
Non-linear finite element analysis of reinforced concrete deep beam with web opening Ferry Alius; Bambang Piscesa; Faimun Faimun; Harun Alrasyid; Data Iranata
Journal of Civil Engineering Vol. 35 No. 1 (2020)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i1.7419

Abstract

The use of Reinforced Concrete (RC) deep beams in the building may require web openings or holes for electricaland mechanical utility passage. This web opening will change the behavior of the RC deep beam and may result in early crackseven at service load. Hence, it is important to use a suitable tool to predict the full response of the RC deep beam with theopening. For that purpose, a nonlinear finite element method using 3D-NLFEA software package which utilizes a plasticityfracture model is used to predict the behavior of RC deep beam. One deep beam specimen available in the literature isinvestigated. To study the effect of using structured and unstructured mesh, as well as different element types on the loaddeflection curve, the hexahedral and tetrahedral solid element was used. From the comparisons, it was observed that the crackpattern between two different meshes was not similar. Structured mesh often has straighter crack propagation compared to theunstructured mesh. The load-deflection curve for both models is similar and both models were performed satisfactorily inpredicting the peak load of the deep beam.
FINITE ELEMENT MODELING OF CIRCULAR REINFORCED CONCRETE COLUMN CONFINED WITH CFRP UNDER ECCENTRIC LOADING Angga Bayu Christianto; Bambang Piscesa; Faimun Faimun; Pujo Aji
Journal of Civil Engineering Vol. 34 No. 2 (2019)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v34i2.7435

Abstract

This paper presents nonlinear finite element analysis of eccentrically loaded circular Reinforced Concrete (RC)column confined with Carbon Fiber Reinforced Polymer (CFRP) wraps. The concrete constitutive model uses a plasticityfracture model which is restraint sensitive, utilize a non-constant plastic dilation rate, and is able to simulate the plasticvolumetric compaction of concrete core under high confining pressure. For validation of the models, two available specimensfrom the literature are used in the validations. Excellent agreement between the numerical models and the available test resultsare obtained in this study. A detailed investigation on the confinement effectiveness of both external and internal confiningdevices are presented and discussed. This discussion of the confinement effectiveness is important to be included in the designformula.
SHEAR BUCKLING ANALYSIS OF CORRUGATED WEB I-GIRDER WITH 3D NONLINEAR FINITE ELEMENT METHOD Ni Putu Ary Yuliadewi; Heppy Kristijanto; Bambang Piscesa; Priyo Suprobo; Faimun Faimun
Journal of Civil Engineering Vol. 36 No. 2 (2021)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v36i2.7635

Abstract

This paper presents a shear buckling analysis of corrugated web I-girder beam using nonlinear finite element analysis. An in-house finite element package called 3D-NLFEA is used in the simulation. The steel material is modelled as solid elements with one-eight aspect ratio between the element size and its thickness. The double sine waves equation is used to generate the initial imperfection in the corrugated web. The nonlinear geometry deformation, which is essential in capturing the buckling behavior, is considered using the 2nd order analysis in 3D-NLFEA. A comparison with the carried out experimental test in the laboratory showed that the peak prediction from the analytical model was in good agreement. Furthermore, using the double sine waves equation as the initial imperfection can closely predict the buckling mode and shapes of the corrugated web I-girder as obtained from the experimental test.
Co-Authors Ahmad B. Habieba Angga Bayu Christianto Bambang Piscesa Data Iranata Ferry Alius Harun Alrasyid Heppy Kristijanto Muhammad F. Firmansyah Ni Putu Ary Yuliadewi Nurcahyo, Cahyono Bintang Priyo Suprobo Pujo Aji