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