Akhmad rafiudin structural engineer zee engineering group. The paper has used this software to produce pod data for acfm and mpi. Pdf reliabilitybased design and assessment for lifetime. 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. Sintef, usfos a computer program for progressive collapse analysis of steel. Progressive collapse and accident analysis usfos dnv gl. Progressive collapse analysis software pushover analysis software. 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. Usfos is a very capable advanced stateoftheart analysis program designed to perform collapse analysis of steel offshore structures. Capability of using fem software such as ansys, comsol multiphysics software. Over the years, i have develop the capability to identify issues with analytical model and quickly resolve problems irrespective of the software program. Khai hoang senior offshore structural engineer ramboll.
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. This download was checked by our builtin antivirus and was rated as virus free. Software options sacs, caesar ii, ansys, usfos, grlweap, hysis, etap, staad. How do i do a pushover analysis of a jacket structure. Sacs is a suite of modular software developed by engineering.
A loaddeformation formulation for chs x and kjoints in. Rsr using usfos software, so we can compare the result. Progressive collapse analysis software pushover analysis. Its solution procedure accounts for both geometric and material nonlinearities. Inplace analysis fatigue analysis earthquake analysis. Hieu tran senior engineer taylor thomson whitting ttw. Sacs offshore structure design and analysis software duration. Abraham omoike senior project engineer marine platforms.
In order to establish the onbottom stability of pipelines, free spans and crossings were evaluated at critical locations. Sesams usfos from dnv gl is a nonlinear fea software solution for accident and pushover. Sesams usfos from dnv gl is a nonlinear fea software solution for accident and pushover analysis, including ship impact analysis. Perform boat impact and nonlinear push over analysis using ufsos program.
Mar 09, 2010 static pushover analysis cougar offshore. A loaddeformation formulation for chs x and kjoints in push over analyses. 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. 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. The usfos software that has been widely adopted for pushover analysis. I have completed my master of science in structural engineering with offshore platform thesis title. Miscellaneous calculation padeye, welding check, finite element analysis, etc 4. Expedite the workflow to conduct full plastic collapse analysis of a structure using the standard sacs analysis input data. Marintek usfos version 79, dnv sesam wadam, hydrod. Are you looking for progressive collapse 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. Arifian agusta phd researcher dtu technical university. Alex elpianto kajuputra senior principal structural. Junior engineer offshore structures jobs in sharjah, uae. Pdf global ultimate strength assessment gusa for lifetime. The basic idea of the program is to use only one finite element per physical. 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. Seismic time history analysis of fixed platform based on. The pushover analyses also called collapse analysis were performed by using the program sacs. The outcome from the pushover run using usfos software, table 3 below shows the result. Use of this software was made possible to the senior author. Offshore structure collapse analysis software sacs collapse.
Design appraisal for offshore structures slideshare. Usfos the ultimate software package for nonlinear static and dynamic analysis ubc loads wind load evaluation program for elements and components. Structure integrity management for fixed structures 1. 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. Ultimate strength analysis of jacket type offshore platforms. Cv offshore structural engineer, api, iso, dnv, norsok, cap. 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. Senior engineer offshore structures jobs in sharjah, uae. A numerical capability to predict the nonlinear response of jacket structures has been developed over the last decade in parallel with experimental investigations. Marintek usfos version 79, dnv sesam wadam, hydrod, genie. 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. Capacity analysis program for offshore structures capfos. Usfos covers static collapse analysis, nonlinear time series dynamic analysis as well as eigenvalue analysis of typically jackets, jackups, topsides and floaters.
The static pushover analyses were performed using sintefs usfos program sintef, 1991, 1993, 1994. 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. Inelastic nonlinear pushover analysis of fixed jackettype. Fatigue analysis with manually specified oscillating loads. Lift analysis transportation analysis floatation analysis on bottom stability analysis 2. Boat impact analysis blast analysis push over analysis. By browsing the site you agree to our use of cookies. 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.
Usfos is a leading computer program for nonlinear static and dynamic analysis of space frame structures. Static pushover analysis using wave load generation. Push over analysis load step load factor base shear capacity kn without foundation 30 4 45669. Sacs structural analysis computer system staad pro structural analysis software usfos for nonlinear analysis. Handson experience in inplace strength, push over, fatigue, seismic, boat impactaccidental and installation related analyses using sacs software. By utilising the inherent redundancy found in most. Topside weight control analysis, and modifications. Usfos identifies the wave phase giving the maximum base shear or over turning moment users. 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. Using usfos the engineer can document the reserve strength of a structure, both before and after damage. Using static pushover analysis to determine the ulti,mate limit. Usfos is a useful tool for carrying out progressive collapse analysis pca, and push over analysis poa, and space frame structures. 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. 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.
Collapse analysis an overview sciencedirect topics. This example involves using sesam manager, genie, sestra and framework. Push over analysis of braced frame using seismostruct duration. 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. The inplace analysis of the platforms was carried out using sacs and the push over analysis was performed by using usfos. Kheiri and bahaari 2006 with using abaqus software performed push over and nonlinear dynamic analysis for two platforms. Sacs structural analysis computer software was used to conduct 3dimensional finite element method analyses of the case study platforms. Push over analysis of braced frame using seismostruct. The effect of wave indeck in conventional pushover analysis. Riser inplace analysis was performed for several risers on highly utilised platforms using rosa. This software was originally designed by dnv software. Structure integrity management for fixed structures. Create a new job in sesam manager and import the zip file to run the example. Sesams program usfos, a nonlinear software tool, not only for pushover analysis, but also for ultimate strength under loads resulting from explosions, fire, ship.
Nov 25, 2010 ultimate strength analysis of flare boom omoruyi thu, nov 25 2010 10. Sacs is a suite of modular software developed by engineering general civil engineering applications 1921. 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. Pro, tekla for further information or to discuss your project needs across the asean region and the world, call us on. 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. Feasibility study for artificial islands in zakum oil field. The most popular version of the dnv software usfos 8. Progressive collapse analysis software for pushover and accidental analysis sesams usfos from dnv gl. Different types of static nonlinear analysis push over are carried out and results are compared. Inplace analysis seismic analysis fatigue analysis 3. Senior engineer offshore structures sharjah, uae job. Global ultimate strength assessment gusa for lifetime extension of ageing offshore structures. This data is now available in the icon user group software. Another pushover analysis was performed by usfos software and in this study the natural period was 2.
Punniya nagappa lead and head of structural discipline sp. November 1114, 2012 adipec lloyds register services to the energy industry. The example demonstrates how to run a socalled direct deterministic fatigue analysis of a structure. The program is particularly efficient in its ability to model non. The objective of the quantitative analysis is to estimate the capacity of the foundation system. Pushover is a simple push notification service that integrates easily into web apps like ifttt, network monitoring systems, shell scripts, and. Effect of elevational and member damage on jacket strength. Usfos is the leading software in ocean engineering for nonlinear analysis, with which highly nonlinear problems can be solved, and has been widely used. Nonlinear analysis of offshore platforms subjected to.
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