Then the results of an investigation on the behavior of three persian gulf platforms due to wave loading using the nonlinear push over analysis method of usfos software are presented. Marintek usfos version 79, dnv sesam wadam, hydrod. Punniya nagappa lead and head of structural discipline sp. Nov 25, 2010 ultimate strength analysis of flare boom omoruyi thu, nov 25 2010 10. Design appraisal for offshore structures slideshare. Usfos is the leading software in ocean engineering for nonlinear analysis, with which highly nonlinear problems can be solved, and has been widely used. Used sacs software extensively for both linear and nonlinear finite element analyses of jacket and topsides of platform and fpso projects for inplace, dynamic, earthquake sle and dle and push over analysis, inplace and transport fatigue deterministic and spectral, accidental shipimpact and push over analysis, loadout, transportation. Structure integrity management for fixed structures. Push over analysis load step load factor base shear capacity kn without foundation 30 4 45669. Dec 24, 2017 to evaluate the integrity of existing offshore platforms due to changes triggered by weight, metocean, anomalies, standard and code, etc by performing ultimate strength analysis push over analysis method using usfos to define the ultimate behavior of the structure beyond its elastic zone. Cap capacity analysis program evaluates nonlinear static and dynamic analysis, wave, earthquake, and wind loadings, and pushoverfailure analysis. Sesam includes the program usfos that is recognized by offshore structural engineers as a leading nonlinear software tool, not only for pushover analysis, but also for ultimate strength under loads resulting from explosions, fire, ship collision, dropped objects and earthquakes. Senior engineer offshore structures jobs in sharjah, uae. Jun 04, 2016 performed push over analysis with usfos to calculate ultimate design load and reserve strength ratio rsr estimated fatigue damage over the service life by employing probabilistic fracture.
Fatigue analysis with manually specified oscillating loads. The sacs required three files, model input file, collapse input file, and pile soil interaction input file pile soil interaction input file is optional during the analyses. Effect of elevational and member damage on jacket strength. Sacs offshore structure design and analysis software duration.
To evaluate the integrity of existing offshore platforms due to changes triggered by weight, metocean, anomalies, standard and code, etc by performing ultimate strength analysis push over analysis method using usfos to define the ultimate behavior of the structure beyond its elastic zone. Handson experience in inplace strength, push over, fatigue, seismic, boat impactaccidental and installation related analyses using sacs software. Sacs structural analysis computer software was used to conduct 3dimensional finite element method analyses of the case study platforms. Progressive collapse analysis software pushover analysis software. I am an expert in using internationally accepted engineering software such as abaqus, sacs, usfos, moses, mstower, mathcad, autocad, microsoft office and other computerized programs. Sacs is a suite of modular software developed by engineering. Software options sacs, caesar ii, ansys, usfos, grlweap, hysis, etap, staad. Different types of static nonlinear analysis push over are carried out and results are compared. Structure integrity management for fixed structures 1. Pushover is a simple push notification service that integrates easily into web apps like ifttt, network monitoring systems, shell scripts, and. By browsing the site you agree to our use of cookies. The basic idea of the program is to use only one finite element per physical. Usfos identifies the wave phase giving the maximum base shear or over turning moment users.
Junior engineer offshore structures jobs in sharjah, uae. The inplace analysis of the platforms was carried out using sacs and the push over analysis was performed by using usfos. Nonlinear analysis of offshore platforms subjected to. This software was originally designed by dnv software. Usfos the ultimate software package for nonlinear static and dynamic analysis ubc loads wind load evaluation program for elements and components. Sintef, usfos a computer program for progressive collapse analysis of steel. I used sacs and sesam extensively for my works, also lots of experience on dnvs usfos software for substructure pushover analysis, boat impact analysis, dynamic blast analysis and grlweap for pile drivability analysis.
The pushover analyses also called collapse analysis were performed by using the program sacs. How do i do a pushover analysis of a jacket structure. Senior engineer offshore structures sharjah, uae job. Using static pushover analysis to determine the ulti,mate limit. In order to establish the onbottom stability of pipelines, free spans and crossings were evaluated at critical locations. Inelastic nonlinear pushover analysis of fixed jackettype. Global ultimate strength assessment gusa for lifetime extension of ageing offshore structures. Results show that the estimated rsr by nonlinear dynamic analysis was higher than estimated rsr by static push over analysis method and in both methods local failures occurred before total loss. Progressive collapse analysis software pushover analysis. The objective of the quantitative analysis is to estimate the capacity of the foundation system. In the beginning, shortly after the formation of the inter university research center for engineering sciences ppauir, the activity in the dynamics laboratory was geared to cover a wide area of disciplines ranging from analytical dynamics, structural dynamics, structural integrity, machinery and component dynamics, precision machinery, to. Hieu tran senior engineer taylor thomson whitting ttw.
Perform boat impact and nonlinear push over analysis using ufsos program. Usfos is a very capable advanced stateoftheart analysis program designed to perform collapse analysis of steel offshore structures. Riser inplace analysis was performed for several risers on highly utilised platforms using rosa. Usfos is used by leading oil companies and engineering consultants world wide, for integrity assessment, collapse analyses and accidental load analyses of offshore jacket structures, topsides, jackups and other frame structures, intact or damaged. Reduce risk of structural failure due to extreme loads from environmental conditions or accidental events with full plastic analysis for initial, recertification, and safety case design. Sesams usfos from dnv gl is a nonlinear fea software solution for accident and pushover analysis, including ship impact analysis. Inplace analysis seismic analysis fatigue analysis 3. Offshore structure collapse analysis software sacs collapse. Kheiri and bahaari 2006 with using abaqus software performed push over and nonlinear dynamic analysis for two platforms. Usfos is a useful tool for carrying out progressive collapse analysis pca, and push over analysis poa, and space frame structures. Miscellaneous calculation padeye, welding check, finite element analysis, etc 4.
Lift analysis transportation analysis floatation analysis on bottom stability analysis 2. The usfos software that has been widely adopted for pushover analysis. Using usfos the engineer can document the reserve strength of a structure, both before and after damage. The most popular version of the dnv software usfos 8. Sesams usfos from dnv gl is a nonlinear fea software solution for accident and pushover. The program is particularly efficient in its ability to model non. Collapse analysis an overview sciencedirect topics. A numerical capability to predict the nonlinear response of jacket structures has been developed over the last decade in parallel with experimental investigations. Cv offshore structural engineer, api, iso, dnv, norsok, cap.
Pushover analysisofa jacket structure sesam includes the program usfos that is recognized by offshore structural engineers as a leading nonlinear software tool, not only for pushover analysis, but also for ultimate strength under loads resulting from explosions, fire, ship collision, dropped objects and earthquakes. Marintek usfos version 79, dnv sesam wadam, hydrod, genie. November 1114, 2012 adipec lloyds register services to the energy industry. This example involves using sesam manager, genie, sestra and framework. Capability of using fem software such as ansys, comsol multiphysics software. Pdf reliabilitybased design and assessment for lifetime. Rsr using usfos software, so we can compare the result. Its solution procedure accounts for both geometric and material nonlinearities. I have completed my master of science in structural engineering with offshore platform thesis title. Sesams program usfos, a nonlinear software tool, not only for pushover analysis, but also for ultimate strength under loads resulting from explosions, fire, ship. Expedite the workflow to conduct full plastic collapse analysis of a structure using the standard sacs analysis input data. Over the years, i have develop the capability to identify issues with analytical model and quickly resolve problems irrespective of the software program.
Arifian agusta phd researcher dtu technical university. Topside weight control analysis, and modifications. Ultimate strength analysis of jacket type offshore platforms. Usfos is a leading computer program for nonlinear static and dynamic analysis of space frame structures. Are you looking for progressive collapse analysis software.
A loaddeformation formulation for chs x and kjoints in. Use of this software was made possible to the senior author. The example demonstrates how to run a socalled direct deterministic fatigue analysis of a structure. This data is now available in the icon user group software. The outcome from the pushover run using usfos software, table 3 below shows the result. Boat impact analysis blast analysis push over analysis. A loaddeformation formulation for chs x and kjoints in push over analyses. Pdf global ultimate strength assessment gusa for lifetime. Progressive collapse and accident analysis usfos dnv gl. Capacity analysis program for offshore structures capfos.
The paper has used this software to produce pod data for acfm and mpi. The effect of wave indeck in conventional pushover analysis. Inplace analysis fatigue analysis earthquake analysis. Mar 09, 2010 static pushover analysis cougar offshore. Jul 27, 2009 in this paper initially the factors affecting a platform nonlinear analysis and methods for considering nonlinear characteristics of structures will be discussed.
Create a new job in sesam manager and import the zip file to run the example. Another pushover analysis was performed by usfos software and in this study the natural period was 2. Alex elpianto kajuputra senior principal structural. Akhmad rafiudin structural engineer zee engineering group. Sacs structural analysis computer system staad pro structural analysis software usfos for nonlinear analysis. The static pushover analyses were performed using sintefs usfos program sintef, 1991, 1993, 1994. In order to evaluate the results and compare this type of modeling with simplified methods included in professional software for the analysis of offshore structures, aforementioned platforms are also analyzed using the fessler and msl models to. Sacs is a suite of modular software developed by engineering general civil engineering applications 1921.
Usfos covers static collapse analysis, nonlinear time series dynamic analysis as well as eigenvalue analysis of typically jackets, jackups, topsides and floaters. Khai hoang senior offshore structural engineer ramboll. By utilising the inherent redundancy found in most. Application for offshore structural engineer dear sirmadam via online research in your company vacancies list, i guess that currently advertised structural engineer job opening may be matching with my expertise, i. Analysis of an intact offshore jacket was performed to calculate the ultimate base shear as an indicator of the jackets ultimate strength to compare with the damaged jackets base shear, this proportion represented as reserve strength ratio and damaged strength ratio, indicated the sensitivity of the platform. This download was checked by our builtin antivirus and was rated as virus free. Seismic time history analysis of fixed platform based on. Feasibility study for artificial islands in zakum oil field. Abraham omoike senior project engineer marine platforms. Push over analysis of braced frame using seismostruct duration.
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