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Ricky L. Tawekal
Program Studi Teknik Kelautan Fakultas Teknik Sipil dan Lingkungan Institut Teknologi Bandung
Civil Engineering, Building, Construction & Architecture

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Perhitungan SCF Untuk Analisa Fatigue pada Sambungan Struktur Anjungan Lepas Pantai Tawekal, Ricky L.
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 13, Nomor 2, Edisi XXXII, JUNI 2005
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.418 KB) | DOI: 10.14710/mkts.v13i2.3910

Abstract

Fatigue is one of the failure modes on offshore structures that need to be monitored carefully. Fatigue analysis is usually carried out to predict the service life of structure due to fatigue on its joints. Fatigue damage is also depent on Stress Concentration Factor (SCF). SCF is the ratio of hotspot stress at joint to nominal stress on member. Hotspot stress is extreme stress occur at intersection of the joint. In this paper, the calculation of SCF at joint T is carried out by using Finite Element Method that available in ProEngineer Software.  The resulted SCF based on Finite Element Method will be compared to calculated SCF based on empirical formula. In addition, SCF on joint T will also be compared to SCF on joint with tubular stiffener.Keywords: fatigue, failure mode, offshore structures, stress concentration factorPermalink: http://ejournal.undip.ac.id/index.php/mkts/article/view/3910[How to cite: Tawekal, R.L., 2005, Perhitungan SCF Untuk Analisa Fatigue pada Sambungan Struktur Anjungan Lepas Pantai, Jurnal Media Komunikasi Teknik Sipil, Volume 13, Nomor 2, pp. 63-74]
Studi Perbandingan Metoda WSD dan LRFD dalam Analisa Struktur Anjungan Lepas Pantai Tawekal, Ricky L.
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 12, Nomor 2, Edisi XXIX, JULI 2004
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.747 KB) | DOI: 10.14710/mkts.v12i2.2679

Abstract

Up to this moment, most of structural design of offshore platforms are carried out by using traditional Allowable Stress Design (or Working Stress Design) specification adopted in American Petroleum Institute (API RP2A – WSD) Codes. In this method, loads and stresses are calculated  based on linier elastic material and then compare them to the allowable loads and stresses. Recently, Load and Resistance Factor Design specification adopted in API RP2A – LRFD have been developed from the API RP2A – WSD using reliability based calibration. General industry practices recognise that older, existing offshore structures may not meet current design standards. However, many of these platforms that are in acceptable condition can be shown to be structutrally adequate using a risk based assesment criteria that considers platform use, location, and the consequences of failure. In this paper, a comparison study on WSD and LRFD methods in structural analysis of offshore platform is carried out by using a monopod offshore platform model. Structural analysis and unity check are performed by using SACS version 5.1 software. Keywords: working stress design, load and resistance factor design,  offshore structures
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