Jostein Hellesland

Professor emeritus - Mekanikk
Bilde av Jostein Hellesland
English version of this page
Mobiltelefon 99630271 9963 0271
Rom 1217
Brukernavn
Besøksadresse Moltke Moes vei 35 Niels Henrik Abels hus 0851 OSLO
Andre tilknytninger Matematisk institutt

Faglige interesser

Mekanisk oppførsel og numerisk modellering av konstruksjoner og faste stoffer generelt; elastiske og ikkelineære analyser; stabilitetsproblemer;  utvikling av normrettede analyse- og dimensjoneringsmetoder for søyler, rammer og plater; virkning av langtidslast og deformasjonspåførte tvangskrefter (indirekte laster) på konstruksjoner med visko-elastiske materialegenskaper (som armert betong).

Universitetsutdanning

  • 1970,  PhD (Philosophiae Doctor), Dept. of Civil Engineering, Univ. of Waterloo,  Waterloo, Ontario, Canada.
  • 1966,  Sivilingeniør, NTH (nå NTNU (Norges teknisk naturvitenskapelige universitet)), Trondheim.

Ansettelser

Faste:

  • 2013.2 --               Professor emeritus.
  • 1988.1 -- 2013.2    Professor i fastoff-/konstruksjonsmekanikk, UiO.
  • 1984.8 -- 1987.12  Professor II i fastoff-/konstruksjonsmekanikk, UiO.
  • 1985.4 -- 1987.12  Senior Principal Engineer (sjefingeniør), Veritas Offshore Technology and Services A/S (som avd.leder for Concr. Structures and Foundations) og  forut for det i Industry and Offshore Division (Dept. for Structures), Det Norske Veritas (DNV), Høvik.
  • 1972.1--1985.4      Prosjektingeniør, Overingeniør, Sjefingeniør,  Dr.ing. A. Aas-Jakobsen A/S (AAJ), Oslo. 

Midlertidige forskeransettelser:                       

  • 1984.6-8            Research Engineer, Univ. of California, Berkeley.
  • 1981.2-9            Research Associate, Univ. of Alberta, Edmonton.
  • 1980.7--1981.2   Research Engineer, Univ. of California, Berkeley.
  • 1966.9-1971.12  Research Assistant og Post Doctoral Fellow, Univ. of Waterloo.

Langvarige gjesteprofessor-/forskeropphold:

  • University of Texas, Austin, USA, høst 1999 (aug.-jan.)
  • Universitat Politecnica de Catalunya (UPC)), Barcelona, Spania,  høst 2001. 

Utvalgte verv o.l.

  • Medlem, NTVA (Norges Tekniske Vitenskapsakademi).
  • 2012.11 --     Medlem, TG6 "Structural Analysis", av CEN-komité 250/SC 2/WG 1/
  • 2008.11 --     Editorial Board member, Journal of Constructional Steel Research.
  • 2004 --          Member,  Int. Struct. Steel Research Advisors (ISSRA),  AISC Journ. 
  • 1997 -- 2001  Editorial Board member, Journal of Computer Methods in Applied Mechanics and Engineering.
  • 1976 -- 1980  Norsk redaktør, Journal of the Nordic Concr. Federation.
  • 1976 -- 1998  Reporter, FIP Notes, Federation Internationale de la Precontrainte.                                                                                                                       

Undervisning

Emner for lavere og høyere grad innen faststoff- og konstruksjonsmekanikk.

Veiledning

-- 63 cand.scient./masterstudenter.

-- 10  doktor-stipendiater (siden 1992).

Rådgivningsaktiviteter

1988 -- 2006: Consulting and advisory services for DNV, Statoil (rehabilitation of Statpipe under-water bridge structures), the Bridge Department of the Directorate of Public Roads, Oslo (development of analysis and design specifications for bridges, and analysis and design aspects of a number of suspension bridges etc.) and Svenska vegverket (Høga Kusten bron).

1985 -- 1987: At DNV, consultancy services to a number of petroleum companies, incl. design review and verification of offshore  structures (Beryl A, Brent B, Maureen ALP, Gullfaks B, Troll GBS, Saga's deepwater tower Karin, etc.), development and updating of design spesifications, and various  R&D projects.

1972 -- 1985: At AAJ, design and consultancy services covering a great number and a wide range of structures, incl. industrial structures, various kinds of bridges and offshore structures, development of design recommendations for offshore structures (for the Norwegian Petroleum Directorate, Norsk Hydro), and a number of R&D oriented studies, etc..

 

Emneord: Mekanikk, Faststoffmekanikk

Publikasjoner

  • Sollund, Håvar Andreas; Vedeld, Knut; Fyrileiv, Olav & Hellesland, Jostein (2016). Improved assessments of wave-induced fatigue for free spanning pipelines. Applied Ocean Research.  ISSN 0141-1187.  61, s 130- 147 . doi: 10.1016/j.apor.2016.10.004 Vis sammendrag
  • Vedeld, Knut; Sollund, Håvar Andreas & Hellesland, Jostein (2015). Closed Analytical Expressions for Stress Distributions in Two-Layer Cylinders and Their Application to Offshore Lined and Clad Pipes. Journal of Offshore Mechanics and Arctic Engineering-Transactions of The Asme.  ISSN 0892-7219.  137(2), s 1- 9 . doi: 10.1115/1.4029357 Vis sammendrag
  • Brubak, Lars; Hareide, O. J. & Hellesland, Jostein (2014). Application of a Semi-Analytical Approach for Vibration Analysis of Irregularly Stiffened Plates. Trita-MEK.  ISSN 0348-467X.  (24), s 220- 229 Vis sammendrag
  • Sollund, Håvar Andreas; Vedeld, Knut & Hellesland, Jostein (2014). Efficient analytical solutions for heated and pressurized multi-layer cylinders. Ocean Engineering.  ISSN 0029-8018.  92, s 285- 295 . doi: 10.1016/j.oceaneng.2014.10.003 Vis sammendrag
  • Sollund, Håvar Andreas; Vedeld, Knut; Hellesland, Jostein & Fyrileiv, Olav (2014). Dynamic response of multi-span offshore pipelines. Marine Structures.  ISSN 0951-8339.  39, s 174- 197 . doi: 10.1016/j.marstruc.2014.07.006
  • Vedeld, Knut; Sollund, Håvar Andreas; Hellesland, Jostein & Fyrileiv, Olav (2014). Effective axial forces in offshore lined and clad pipes. Engineering structures.  ISSN 0141-0296.  66, s 66- 80 . doi: 10.1016/j.engstruct.2014.01.051 Vis sammendrag
  • Brubak, Lars; Andersen, Håkon S. & Hellesland, Jostein (2013). Ultimate strength prediction by semi-analytical analysis ofstiffened plates with various boundary conditions. Thin-walled structures.  ISSN 0263-8231.  62(January), s 28- 36 . doi: 10.1016/j.tws.2012.08.005 Vis sammendrag
  • Brubak, Lars; Hellesland, Jostein & Hareide, Ole J. (2013). Vibration analysis of plates with arbitrary stiffener arrangements using a semi-analytical approach, In  Computational Methods in Marine Engineering V.  International Center for Numerical Methods in Engineering (CIMNE).  ISBN 978-84-941407-4-7.  Vitenskapeli artikkel.  s 320 - 331
  • Challamel, Noël & Hellesland, Jostein (2013). Buckling of softening columns in a continuum damage mechanics perspective - Local versus non-local formulation. European journal of mechanics. A, Solids.  ISSN 0997-7538.  39(May-June), s 229- 242 . doi: 10.1016/j.euromechsol.2012.11.007 Vis sammendrag
  • Challamel, Noël; Kolvik, Gjermund & Hellesland, Jostein (2013). Plate buckling analysis using a general higher order shear deformation theory. International Journal of Structural Stability and Dynamics.  ISSN 0219-4554.  13(5) . doi: 10.1142/S0219455413500284 Vis sammendrag
  • Vedeld, Knut; Sollund, Håvar Andreas & Hellesland, Jostein (2013). Free vibrations of free spanning offshore pipelines. Engineering structures.  ISSN 0141-0296.  56, s 68- 82 . doi: 10.1016/j.engstruct.2013.04.013
  • Hellesland, Jostein (2012). Evaluation of effective length formulas and applications in system instability analysis. Engineering structures.  ISSN 0141-0296.  45(12 (Dec)), s 405- 420 . doi: 10.1016/j.engstruct.2012.06.028 Vis sammendrag
  • Brubak, Lars & Hellesland, Jostein (2011). Semi-analytical postbuckling analysis of stiffened imperfect plates with a free or stiffened edge. Computers & structures.  ISSN 0045-7949.  89(17-18), s 1574- 1585 . doi: 10.1016/j.compstruc.2011.05.007 Vis sammendrag
  • Challamel, Noël & Hellesland, Jostein (2011). Simplified buckling analysis of imperfection sensitive reinforced concrete structures, In Jouni Freund & Reijo Kouhia (ed.),  Proceedings of the 24th Nordic Seminar on Computational Mechanics.  Alto University publication series.  ISBN 978-952-60-4347-0.  Stability.  s 141 - 144 Vis sammendrag
  • Andersen, Håkon s.; Hellesland, Jostein & Brubak, Lars (2010). Strength criterion for stiffened plates with a free or stiffened edge. Trita-MEK.  ISSN 0348-467X. Vis sammendrag
  • Brubak, Lars & Hellesland, Jostein (2010). Response propagation analysis of imperfect stiffened plates with a free or flexible edge using a semi-analytical method. Trita-MEK.  ISSN 0348-467X. Vis sammendrag
  • Brubak, Lars; Hellesland, Jostein & Steen, Eivind (2009). Approximate postbuckling analysis of imperfect stiffened plates with a free edge, In T. Kvamsdal; B.R. Pettersen; P. Bergan; E. Onate & J. Garcia (ed.),  Computational methods in marine engineering III.  International Center for Numerical Methods in Engineering (CIMNE).  ISBN 9788496736665.  KAPITTEL.  s 336 - 338
  • Hellesland, Jostein (2009). Extended second order approximate analysis of frames with sway-braced column interaction. Journal of constructional steel research.  ISSN 0143-974X.  65(5), s 1075- 1086 . doi: 10.1016/j.jcsr.2008.08.008 Vis sammendrag
  • Hellesland, Jostein (2009). Second order approximate analysis of unbraced multistorey frames with single curvature regions. Engineering structures.  ISSN 0141-0296.  31(8), s 1734- 1744 . doi: 10.1016/j.engstruct.2009.02.015 Vis sammendrag
  • Brubak, Lars & Hellesland, Jostein (2008). Strength criteria in semi-analytical, large deflection analysis of stiffened plates in local and global bending. Thin-walled structures.  ISSN 0263-8231.  46(12), s 1382- 1390 . doi: 10.1016/j.tws.2008.03.013 Vis sammendrag
  • Hellesland, Jostein (2008). Mechanics and slenderness limits of sway-restricted reinforced concrete columns. Journal of Structural Engineering.  ISSN 0733-9445.  134(8), s 1300- 1309 . doi: 10.1061/(ASCE)0733-9445(2008)134:8(1300) Vis sammendrag
  • Steen, Eivind; Byklum, Eirik & Hellesland, Jostein (2008). Elastic postbuckling stiffness of biaxially compressed rectangular plates. Engineering structures.  ISSN 0141-0296.  30(10), s 2631- 2643 . doi: 10.1016/j.engstruct.2008.02.006 Vis sammendrag
  • Brubak, Lars & Hellesland, Jostein (2007). Approximate buckling strength analysis of arbitrarily stiffened, stepped plates. Engineering structures.  ISSN 0141-0296.  29(9), s 2321- 2333 . doi: 10.1016/j.engstruct.2006.12.002 Vis sammendrag
  • Brubak, Lars & Hellesland, Jostein (2007). Semi-analytical postbuckling and strength analysis of arbitrarily stiffened plates in local and global bending. Thin-walled structures.  ISSN 0263-8231.  45(6 (June)), s 620- 633 . doi: 10.1016/j.tws.2007.04.011 Vis sammendrag
  • Brubak, Lars; Hellesland, Jostein & Steen, Eivind (2007). Closure to discussion by O. Bedair of 'Semi-analytical buckling strength analysis of plates with arbitrary stiffener arrangements'. Journal of constructional steel research.  ISSN 0143-974X.  63(12), s 1618- 1620 . doi: 10.1016/j.jcsr.2007.05.012
  • Brubak, Lars; Hellesland, Jostein & Steen, Eivind (2007). Semi-analytical buckling strength analysis of plates with arbitrary stiffener arrangements. Journal of constructional steel research.  ISSN 0143-974X.  63(4), s 532- 543 . doi: 10.1016/j.jcsr.2006.06.002 Vis sammendrag
  • Hellesland, Jostein (2007). Mechanics and Effective Lengths of Columns with Positive and Negative End Restraints. Engineering structures.  ISSN 0141-0296.  29(12), s 3464- 3474 . doi: 10.1016/j.engstruct.2007.08.021 Vis sammendrag
  • Brubak, Lars & Hellesland, Jostein (2007). Strength criteria in stiffened plate analysis using semi-analytical, large deflection methods, In E. Onate; J. Garcia; P. Bergan & T. Kvamsdal (ed.),  Computational Methods in Marine Engineering II.  International Center for Numerical Methods in Engineering (CIMNE).  ISBN 978-84-96736-19-1.  Kapittel.  s 71 - 74
  • Hellesland, Jostein (2005). Nonslender Column Limits for Braced and Unbraced Reinforced Concrete Members. ACI Structural Journal.  ISSN 0889-3241.  102(1), s 12- 21
  • Mari, Antonio R. & Hellesland, Jostein (2005). Lower slenderness limits for rectangular reinforced concrete columns. Journal of Structural Engineering.  ISSN 0733-9445.  131(1)
  • Hellesland, Jostein (2000). An improved K-factor formula. Discussion,. Journal of Structural Engineering.  ISSN 0733-9445.  126(5)
  • Hellesland, Jostein (1998). Application of the method of means to the stability analysis of unbraced frames. Journal of constructional steel research.  ISSN 0143-974X.  46(1-3)
  • Hellesland, Jostein & Bjorhovde, Reidar (1998). Closure of "Restraint demand factors and effective lengths of braced columns". Journal of Structural Engineering.  ISSN 0733-9445.  124, s 474- 475

Se alle arbeider i Cristin

  • Casandjian, Charles; Challamel, Noël; Lanos, Christophe & Hellesland, Jostein (2013). R. C. Beams, Columns and Frames - Mechanics and Design. John Wiley & Sons.  ISBN 9781848214828.  320 s.
  • Hellesland, Jostein; Challamel, Noël; Casandjian, Charles & Lanos, Christophe (2013). R. C. Beams, Columns and Frames - Section and Slender Member Analysis. John Wiley & Sons.  ISBN 9781848215696.  320 s.

Se alle arbeider i Cristin

  • Hellesland, Jostein (2017). 2. ordens beregninger av staver og rammer - Generelt og etter Eurokode 2 (NS-EN 1992).
  • Hellesland, Jostein (2016). Preliminary global stiffness proposal (for second order global system analysis) (Doc. TG6/N77)..
  • Hellesland, Jostein (2016). Second order analysis of members and systems -- Revised and updated proposal for EC2-5.8 (Doc.TG6/N82).
  • Hellesland, Jostein (2016). Second order structural analysis of members and systems -- Revised proposal for EC2-5.8 (CEN Document TG6/N107).
  • Hellesland, Jostein (2015). Comments on EI-values in the moment-magnifier procedure of EC2, and in Dutch rules (Doc.TG6/N48)..
  • Hellesland, Jostein (2015). Flexural stiffness for slender columns -- A collection of published research (Doc. TG6/N61)..
  • Brubak, Lars; Hareide, O. J. & Hellesland, Jostein (2014). On Application of a Semi-Analytical Approach for Vibration Analysis of Irregularly Stiffened Plates.
  • Hellesland, Jostein (2014). Discussion of proposal for Second order structural analysis of members and systems (doc. TG6/14).
  • Hellesland, Jostein (2014). Principles and basis for nominal stiffness and curvature (doc. TG6/N37).
  • Hellesland, Jostein (2014). Second order analysis of members and systems -- Proposal for EC2-5.8 (doc.CEN/TC250/SC2/WG1/TG6 N14).
  • Brubak, Lars; Hellesland, Jostein & Hareide, Ole J. (2013). Vibration analysis of plates with arbitrary stiffener arrangement using a semi-analytical approach.
  • Hellesland, Jostein (2013). Second order structural analysis of members and systems -- Preliminary comments towards revising EC2:2004-sect.5.8.
  • Challamel, Noël & Hellesland, Jostein (2012). Buckling of Imperfect CDM Structural Systems.
  • Challamel, Noël & Hellesland, Jostein (2012). Post-buckling and post-failure of CDM structural systems.
  • Hareide, Ole J.; Brubak, Lars; Steen, Eivind & Hellesland, Jostein (2012). Approximate buckling model for steel-elastomer sandwich plates. Vis sammendrag
  • Andersen, Håkon S.; Hellesland, Jostein & Brubak, Lars (2010). On strength criteria for stiffened plates with a free or stiffened edge.
  • Brubak, Lars & Hellesland, Jostein (2010). On response propagation analysis of imperfect stiffened plates with a free or flexible edge using a semi-analytical method.
  • Brubak, Lars & Hellesland, Jostein (2010). Semi-analytical large displacement analysis of stiffened imperfect plates with a free or stiffened edge. Preprint series (Universitetet i Oslo. Matematisk institutt), Mechanic. 2. Fulltekst i vitenarkiv.
  • Brubak, Lars; Hellesland, Jostein & Steen, Eivind (2009). Approximate postbuckling analysis of imperfect stiffened plates with a free edge.
  • Hellesland, Jostein (2009). Closure to "Mechanics and Slenderness Limits of Sway-Restricted Reinforced Concrete Columns" by Jostein Hellesland. Journal of Structural Engineering.  ISSN 0733-9445.  135(11), s 1431- 1433
  • Hellesland, Jostein (2009). Konstruksjonsmekanikk MEK3500/4500--Ekasamensoppgaver med løsningsforslag.
  • Hellesland, Jostein (2009). Lineære og ikke-lineære beregningsmetoder -- 2. ordens virkninger.
  • Hellesland, Jostein (2009). Lineære og ikke-lineære beregningsmetoder -- 2. ordens virkninger.
  • Hellesland, Jostein (2009). Lineære og ikke-lineære beregningsmetoder -- 2. ordens virkninger.
  • Hellesland, Jostein (2009). Lineære og ikke-linære beregningsmetoder-- 2. ordens lastvirkninger.
  • Hellesland, Jostein (2009). Todimensjonal elastisitetsteori for tynne plater--Introduksjon.
  • Hellesland, Jostein (2008). Approximate second order analysis of unbraced frames reflecting inter-storey interaction in single curvature regions. Research report in mechanics. 08-2.
  • Hellesland, Jostein (2008). Extended second order approximate sway and critical load analysis of frames with sway-braced column interaction. Research report in mechanics. 08-1.
  • Hellesland, Jostein (2008). NS-EN 1992 Lineære og ikke-lineære beregningsmetoder - 2. ordens lastvirkninger.
  • Hellesland, Jostein (2008). NS-EN 1992, Eurokode-2 -- Lineære og ikke-lineære beregningsmetoder; 2. ordens lastvirkninger.
  • Brubak, Lars & Hellesland, Jostein (2007). Strength criteria in local and global semi-analytical, large deflection analysis of arbitrarily stiffened plates. Preprint series. Mechanics and Applied Mathematics. 07-2.
  • Brubak, Lars & Hellesland, Jostein (2007). Strength criteria in stiffened plate analysis using semi-analytical, large deflection methods.
  • Brubak, Lars & Hellesland, Jostein (2006). Computational postbuckling and strength analysis of arbitrarily stiffened plates in local and global bending. Preprint series. Mechanics and Applied Mathematics. 06-3.
  • Brubak, Lars & Hellesland, Jostein (2006). Semi-analytical buckling strength analysis of arbitrarily stiffened plates with varying thickness. Preprint series. Mechanics and Applied Mathematics. 06-2.
  • Brubak, Lars & Hellesland, Jostein (2005). Computational buckling strength analysis of stiffened plates with varying thickness.
  • Brubak, Lars & Hellesland, Jostein (2005). Computational buckling strength analysis of stiffened plates with varying thickness, In P. Bergan; J. Garcia; E. Onate & T. Kvamsdal (ed.),  Computational Methods in Marine Engineering.  International Center for Numerical Methods in Engineering (CIMNE).  ISBN 84-95999-63-3.  Ultimate Strength .....  s 355 - 364
  • Brubak, Lars; Hellesland, Jostein & Steen, Eivind (2005). Semi-analytical buckling strength analysis of plates with arbitrary stiffener orientations. Preprint series. Mechanics and Applied Mathematics. Nr. 05 - 3. Vis sammendrag
  • Hellesland, Jostein (2005). Analysis of second order effects with axial loads, EN 1992-1-1-2004 (E), 5.8 -- Nasjonalt tillegg (NA).
  • Hellesland, Jostein (2005). Buckling of plates, slenderness limits of columns, etc. -- Research overview.
  • Hellesland, Jostein (2005). Comments to Proposed Changes to ACI 318-02 Slender Column Provisions. Research report in mechanics. No. 5.
  • Hellesland, Jostein & Brubak, Lars (2005). Stability of Stiffened Orthotropic Plates: Performance Based Design.
  • Brubak, Lars & Hellesland, Jostein (2004). Approximate buckling strength analysis of plates with arbitrarily oriented stiffeners.
  • Brubak, Lars & Hellesland, Jostein (2004). Knekningsanalyse av plater med vilkårlig orienterte stivere.
  • Osnes, Harald & Hellesland, Jostein (2004). Faststoff-/konstruksjonsmekanikk ved UiO.
  • Mari, Antonio & Hellesland, Jostein (2003). When can second order effects in columns be neglected?.
  • Hellesland, Jostein (2003). Non-slender Column Limits for Braced, End-loaded Members. Preprint series. Mechanics and Applied Mathematics. 2.
  • Hellesland, Jostein (2003). Non-slender RC Column Limits. Preprint series. Mechanics and Applied Mathematics. 1. Vis sammendrag
  • Hellesland, Jostein (2002). Lower slenderness limits for braced, end loaded r.c. compression members. Research report in mechanics. 2. Vis sammendrag
  • Hellesland, Jostein (2002). Lower slenderness limits for unbraced and transversely loaded braced r.c. compression members. Research report in mechanics. 1.
  • Andersen, Alfred; Osnes, Harald & Hellesland, Jostein (2000). Computational analysis of computational joints.
  • Hellesland, Jostein; Osnes, Harald & Skeie, Geir (2000). Proceedings of the 13th Nordic Seminar on Computational Mechanics. Vis sammendrag
  • Hellesland, Jostein (1999). Bridge design and construction in Norway.
  • Hellesland, Jostein (1999). On column slenderness limits. Fulltekst i vitenarkiv.
  • Hellesland, Jostein (1999). Slanke konstruksjonsdeler.
  • Hellesland, Jostein (1999). Slanke konstruksjonsdeler.
  • Hellesland, Jostein (1999). Structural engineering for the largest petroleum exploration structure in the North Sea,.
  • Hellesland, Jostein (1998). Andre ordens teori for armert betongstav--Prinsipper og forenklinger,.
  • Hellesland, Jostein (1998). Dimensjoneringsgrunnlag for vertikale avstivningssystemer,.
  • Hellesland, Jostein (1998). Dimensjoneringsgrunnlag for vertikale avstivningssystemer,.
  • Hellesland, Jostein (1998). Dimensjoneringshjelpemidler for slanke trykkstaver,.
  • Hellesland, Jostein (1998). Kommentarer og forslag til endringer i NS 3473, pkt.A.9.4.4 (4.utg.,1992) vedr. rotasjonsbehov og rotasjonskapasitetsberegninger,.
  • Hellesland, Jostein (1998). Slanke betongkonstruksjoner -- Oversikt over beregningsmetoder, bestemmelser i NS 3473, og aktuelle konstruksjonsdeler,.
  • Hellesland, Jostein (1998). Slanke trykkstaver etter NS 3473,.
  • Hellesland, Jostein (1998). Trykkstaver i rammesystem--Knekklengder,.
  • Hellesland, Jostein (1998). Trykkstaver i rammesystemer,.

Se alle arbeider i Cristin

Publisert 13. nov. 2010 14:22 - Sist endret 16. juli 2015 23:22