Civil Engineering Departments Research and innovation

Research and innovation

Research

Current research works

Theory and methods of shakedown building structures optimization. Supervisor: J. Atkočiūnas. (2014-2018). Researchers: S. Kalanta, R. Karkauskas, L. Rimkus, E. Jarmolajeva, A. Grigusevičius, D. Merkevičiūtė, M. Popov, G. Blaževičius, T. Ulitinas,
2014. Optimization of shakedown bar structures: EC state of safety and workability.

Completed research works:

Optimal design of engineering structures: coupling of mathematical models and computer technologies.
Supervisor: J. Atkočiūnas. (2009-2013).
MATLAB implementation in optimal design of elastic-plastic steel structures. Supervisor: V. Jankovski. (2009-2013).
Discrete optimization of elastic plastic strengthening bar structures. Supervisor A. Grigusevičius. (2006-2010).
Development of inelastic structural optimization methods. Supervisor J. Atkočiūnas. (2004-2008).
Design methods and optimization of structures from plastical-strengthening materials. Supervisor J. Atkočiūnas.(1999-2003).
Theory and methods of structural design and optimization. Supervisor A. Krutinis. (1995-1998).

Research fields

Structural optimization theory and numerical methods of mechanics
Optimal shakedown design of inelastic structures
Application of mathematical programming in engineering plasticity

Achievements

Achievements of Structural mechanics department:

A. Čyras. B. Galiorkin award. 1968.
A. Čyras. Lithuanian state science award. 1976.
A. Čyras, J. Atkočiūnas, S. Kalanta, R. Karkauskas, A. Krutinis, J. Nagevičius. Lithuanian state science award. 1993.
A. Čyras. 3-degree order and medal of Great Lithuanian Duke Gediminas. 1996.
D. Merkevičiūtė. Citation of Lithuanian Academy of Science competition for high school students scientific works. 2002.
J. Atkočiūnas, J. Nagevičius. 1-st Prize of VGTU textbook competition for textbook "J.Atkočiūnas, J.Nagevičius. Fundamentals of elasticity theory. Vilnius : Technika, 2004. 528p.“ (in Lithuanian).
S. Kalanta. 3-rd Prize of VGTU textbook competition for textbook "Fundamentals of applied optimization. Formulation and solution methods of linear problems" . (In Lithuanian).
J. Atkočiūnas. VGTU textbook publishing competition. 2012. 1-st Prize for textbook:„Atkočiūnas, Juozas; Čižas, Algirdas Eduardas. Mechanics of inelastic structures: textbook / Juozas Atkočiūnas, Algirdas Eduardas Čižas ; Vilniaus Gedimino technikos universitetas. Vilnius: Technika, 2009. 268 p. ISBN 978-9955-28-492-5. (In Lithuanian).

Projects

EC programme FRAMEWORK

EC programme FRAMEWORK-5. Project “Performance Based Building”.
Supervisor: E. K. Zavadskas.
Project duration: 2001-2005.
EC programme FRAMEWORK-6. Project “Bringing Retrofit Innovation to Application in Public Buildings, BRITA in PuBs”. Supervisor: A. Kaklauskas.
Project duration: 2004-2005
EC programme FRAMEWORK-6. Project: EPRI start – Simulate the participation of SMEs from NMS in IST activities. Supervisor A. Kaklauskas. Members: R. Karkauskas, L. Rimkus. Project duration: 2005-2006
Intelligent energy – Europe (IEE) programme "Promotion of the very low-energy house concept to the North Europe building market" (NorthPass). 2009-2012. Head of the project: A. Kaklauskas (Dept of Construction economics and property management). Member R. Karkauskas (Dept of Structural mechanics).

Conferences

Participation in scientific conferences

R. Karkauskas. Stress Strain State Analysis of Geometricall Nonlinear Structures // Republican scientific seminar “Mechanics of building structures”. Vilnius. 17 10 1997 (in Lithuanian).
A. Krutinis. Research of System “Structure – Basement” Rigidity Influence for Distribution of Stresses and Sediments // Republican scientific seminar “Mechanics of building structures”. Vilnius. 17 10 1997 (in Lithuanian).
J. Atkočiūnas. Mathematical Models of Optimization Problems at Shakedown // 16th Int. Conf. “Math. Modelling in Mechanics of Solids & Structures Boundary & FEM”. St. Petersburg, Russia, June (in Russian).
J. Atkočiūnas, A. Krutinis. Development of Structural Mechanics in Vilnius // Scientific historical conference “Development of technical sciences in Lithuania”. Vilnius. 07 05 1998 (in Lithuanian).
A. Krutinis. Stress Strain Analysis of a Plate Wall on Deformable Basement // Republican scientific seminar “Mechanics of building structures”. Vilnius, 10 17 1997 (in Lithuanian).
L. Rimkus. Funds of Science Support // Scientific Conference “Lithuania without science – Lithuania without future”. Vilnius, 30 09 – 01 10 1998 (in Lithuanian).
J. Atkočiūnas. On Optimal Shakedown Design of Plastic Structures // 6th International Conference “Modern Building Materials, Structures and Techniques.” Vilnius. 19-22 May,1999 (in Lithuanian).
S. Kalanta. Optimization of Bar Systems under limited Displacements and Bar Energy Dissipation // International Conference “Mechanics-99”. Kaunas. 8-9 04 1999 (in Lithuanian).
S. Kalanta. An Improved Bar Finite Element // The 6th International Conference “Modern building materials and techniques”. Vilnius. 1999 05 19-22 (in Lithuanian).
R. Karkauskas. The Algorithm for the Optimization of Geometrically Nonlinear Elastic-Plastic Structures under Displacement Constraints // 2nd International Conference, “Strength, Durability and Stability of Materials and Structures SDSMS’99”. Panevėžys. Sept 16-18,1999.
A. Krutinis, V. Skaržauskas. Variational Formulations of Problems of the Systems on Deformable Ground // The 6th International Conference “Modern building materials and techniques”. Vilnius. 19-22 05 1999 (in Lithuanian).
J. Nagevičius, L. Rimkus, E. Chraptovič. Energy Interpretation of Complementarity Conditions at Shakedown // The 6th International Conference “Modern building materials and techniques”. Vilnius. 19-22 05 1999 (in Lithuanian).
L. Rimkus. Participation of VGTU Scientists in International Programs // Lithuanian scientific congress “Lithuanian science at the turn of the century”. Vilnius. 09 10 1999 (in Lithuanian).
V. Skaržauskas, J. Atkočiūnas. Frame Loading Optimization at Shakedown // 2nd International Conference, “Strength, Durability and Stability of Materials and Structures SDSMS’99”. Panevėžys. Sept 16-18, 1999.
R. Karkauskas. Optimization of Geometrically Nonlinear Structures under strength and rigidity limits // XVII International Conference “Finite and limit element methods in deformable body and structural mechanics”. Saint Petersburg. Russia. 22-25 June, 1999 (in Russian).
J. Atkočiūnas, A. Krutinis. Kazimieras Vasiliauskas as a Pioneer of Structural Mechanics Manuals in Lithuanian // Scientific Historical Conference. Vilnius. 22 09 1999
A. Krutinis, A. Grigusevičius. Systems With one sided Relations Mathematical Models and Calculation Algorithms // Conference “Science and Technologies in Western Lithuania”. Klaipėda. 21-22 10 1999.
R. Karkauskas. Warsaw. International symposium "Semi-rigid joints in metal and composite structures", 2000.
R. Karkauskas. Warsaw. 8th Ukrainian-Polish seminar "Theoretical foundations in civil engineering", 2000.
E. Chraptovič. Vilnius. The third conference of young Lithuanian scientists "Lithuania without science - Lithuania without future". 2000.
L. Rimkus, E. Chraptovič. Weimar. “Internationales Kolloquium ueber die Anwendungen der Informatik und der Mathematik in Architektur und Bauwesen”. 2000.
E. Chraptovič, J. Atkočiūnas. Shakedown of Structures: Mechanical Interpretation of Rosen Optimality Criteria. 7th International Conference “Modern Building Materials, Structures and Techniques", Vilnius, 16-18 05 2001.
E. Jarmolajeva, J. Atkočiūnas. Non-linear problems and their solution of shakedown plate load optimization. 9th conference of Lithuanian computational mechanics association, Vilnius, 18 10 2001 (in Lithuanian).
D. Merkevičiūtė, J. Atkočiūnas, V. Skaržauskas. Application of mathematical programming in frame shakedown problems. 9th conference of Lithuanian computational mechanics association, Vilnius,18 10 2001 (in Lithuanian).
E. Chraptovič. Vilnius. 4th conference of young Lithuanian scientists "Lithuania without science - Lithuania without future". 2001.
E. Chraptovič. Kaunas. Intern conference „Mechanics" 2001”. 2001.
S. Kalanta, A. Grigusevičius, A. Krutinis. Contact Problems' Formulae of Deformable Foundation. 7th Intern conference “Modern Building Materials, Structures and Techniques”, Vilnius, 16-18 05 2001.
E. Jarmolajeva, D. Merkevičiūtė. Kuhn and Tucker conditions in structural mechanics, elasticity and plasticity theory problems. 10th seminar of Lithuanian computational mechanics association, Vilnius, 15 03 2002 (in Lithuanian).
J. Atkočiūnas, A. Krutinis. First articles of Aleksandras Čyras about duality in structural mechanics. Development of science and technology in Lithuania: Vilnius: 26 11 2002 (in Lithuanian).
A. Krutinis, A. Smilgevičius. Former student of RPI K. Vasiliauskas - founder of structural mechanics in Lithuania. Riga technical university - the first higher technical school in Baltic region. Riga: 11-12 10 2002 (in Russian).
J. Atkočiūnas, A. Čižas. Aleksandras Čyras and his school. Modern problems of structural mechanics. Conference devoted to the 75th anniversary of Academician Aleksandras Čyras. Vilnius, 15 03 2002 (in Lithuanian).
A. Norkus. Optimierung von elastischen plastischen Strukturen. Seminar in Structural Mechanics Institute of Weimar higher school of Civil Engineering and Architecture. 07 05 2002 (in German).
J. Mačiulytė. Stress strain field analysis of reconstructing embankment. 5th conference of young Lithuanian scientists "Lithuania without science - Lithuania without future". Vilnius: 28 03 2002 .
A. Venskus. Stresses of bendable plate shakedown state. 5th conference of young Lithuanian scientists "Lithuania without science - Lithuania without future". Vilnius, 28 03 2002
D. Merkevičiūtė. Optimization of shakedown elastic-plastic frame load. 5th conference of young Lithuanian scientists "Lithuania without science - Lithuania without future", Vilnius, 28 03 2002 (in Lithuanian).
D. Merkevičiūtė. Vilnius. 4th conference of young Lithuanian scientists "Lithuania without science - Lithuania without future", 2001 (in Lithuanian).
A. Grigusevičius. Optimization of elastic-plastic bar structures, taking into account strengthening of material and limits of displacements. 5th conference of young Lithuanian scientists "Lithuania without science - Lithuania without future", Vilnius, 28 03 2002 (in Lithuanian).
D. Merkevičiūtė, J. Atkočiūnas. Method for unloading phenomenon fixation at shakedown. Strength, Durability and Stability of Materials and Structures: abstracts of the 3rd International Conference SDSMS'03. Klaipėda: 2003 09 17-19.
J. Atkočiūnas, D. Merkevičiūtė. Kuhn-Tucker conditions and load optimization problem at shakedown.15th International Conference on Computer Methods in Mechanics CMM-2003. 1st Conference on Computational Mechanics. Gliwice (Lenkija): 2003 06 03-06. J. Atkočiūnas, D. Merkevičiūtė. Optimal shakedown design for bar systems: strength, stifness and stability constraints. Seventh International Conference on Computational Structures Technology. Lisbon, Portugal 7-9 September 2004.
D. Merkevičiūtė, J. Atkočiūnas. Optimal shakedown design of trusses: strenght, stiffness and stability constraints Modern building materials, structures and techniques. 8th international conference, held on May 19-22, 2004 Vilnius, Lithuania.
D. Merkevičiūtė, J. Atkočiūnas. Minimum volume of trusses under shakedown loading. Theoretical Foundations of Civil Engineering: Polish - Ukrainian Transactions / Warsaw University of Technology Faculty of Civil Engineering, Pridneprovsk State Academy of Civil Engineering and Architecture. 2004.
S. Kalanta, A. Grigusevičius. Modeling of elastic-plastic beam structures optimization problems by finite element method. Modern building materials, structures and techniques: 8th international conference, held on May 19-22, 2004 Vilnius.
A. Krutinis, A. Grigusevičius. New formulae of circular plates on deformable foundation contact problem. Modern building materials, structures and techniques. 8th international conference, held on May 19-22, 2004 Vilnius, Lithuania / Vilnius Gediminas Technical University. Faculty of Civil Engineering.
A. Norkus, R. Karkauskas Elastic-plastic randomly loaded truss optimization under stiffness and stability constraints. Modern building materials, structures and techniques. 8th international conference, held on May 19-22, 2004 Vilnius, Lithuania / Vilnius Gediminas Technical University. Faculty of Civil Engineering.
A. Juozapaitis, A. Norkus. Analysis of cable kinematical displacements. Modern building materials, structures and techniques. 8th international conference, held on May 19-22, 2004 Vilnius, Lithuania / Vilnius Gediminas Technical University. Faculty of Civil Engineering.
E. K. Zavadskas, A. Kaklauskas, P. Vainiūnas, R. Dubakienė, A. Gulbinas, M. Krutinis, P. Čyras, L. Rimkus. A building's refurbishment knowledge and device based decision support system. Cooperative design, visualization, and engineering: third international conference, Cdve 2006, Mallorca, Spain, September 17-20, 2006.
A. Norkus; R. Karkauskas; J. Atkočiūnas. Towards implementing of codified design requirements into optimization of inelastic bar structures // Modern building materials, structures and techniques: proceedings of the 9th international conference, held on May 16-18, 2007 Vilnius , Lithuania / IABSE Lithuanian Group, Lithuanian Academy of Sciences, VGTU Civil Engineering Faculty.
J. Atkočiūnas; L. Rimkus; V. Skaržauskas; E. Jarmolajeva. Iterative algorithm for optimal shakedown design of plates // Modern building materials, structures and techniques: proceedings of the 9th international conference, held on May 16-18, 2007 Vilnius , Lithuania / IABSE Lithuanian Group, Lithuanian Academy of Sciences, VGTU Civil Engineering Faculty.
S. Kalanta; J. Atkočiūnas; A. Venskus. Discrete optimization problems of the steel bar structures // Modern building materials, structures and techniques: proceedings of the 9th international conference, held on May 16-18, 2007 Vilnius , Lithuania / IABSE Lithuanian Group, Lithuanian Academy of Sciences, VGTU Civil Engineering Faculty.
J. Atkočiūnas; D. Merkevičiūtė; A. Venskus; L. Rimkus. Optimal shakedown design of steel structures // Anwendung der Optimierung in der nichtlinearen Tragwerksanalyse / Schriftenreihe des Institutes fuer Konstruktiven Ingenieurbau Bauhaus-Universität Weimar. Weimar: Bauhaus-Universität Weimar, Fakultät Bauingenieurwesen, 2007.
J. Atkočiūnas; A. Venskus. Shakedown theory: a generalized approach to the optimization of elastic-plastic structures // Strength, durability and stability of materials and structures. SDSMS'04: 4rd International conference, held on 17-19 September 11-13, 2007 Palanga , Lithuania / International Federation for the Theory of Machines and Mechanisms, Kaunas University of Technology, Vilnius Gediminas Technical University, Klaipeda University. Kaunas.2007
R. Karkauskas; M. Popov. Algorithm of optimizationof inelastic hinge-bar structures and its integration with modern computer technologies of structural analysis // Problems of modern concrete and reinforced concrete: [International symposium, 16-19 October, 2007, Minsk ] / Ministry of architecture and civil engineering of Belarus, National academy of sciences of Belarus, Minsk, 2007. (in Russian).
M. Popov; R. Karkauskas. About integration of elastic-plastic plates optimization problems with computer structural analysis systems // Civil engineering: 10-th conference of young scientists "Science - future of Lithuania", held in Vilnius March 29-30, 2007. (in Lithuanian).
R. Karkauskas, A. Norkus. Towards bridge optimization: evaluation of optimal parameters at critical response states // The 7th International conference "Environmental engineering", May 22-23, 2008 Vilnius, Lithuania.
J. Atkočiūnas, A. Venskus. Optimal shakedown design of frames under stability conditions // Ninth International Conference on Computational Structures Technology. Athens, Greece 2-5 September 2008.
E. Maksimovič, J. Atkočiūnas. Mathematical model of analysis problem for circular plates in case of Tresca plasticity criterion // 11th conference of Lithuanian young scientists "Science – future of Lithuania“ April 2–4, 2008. (in Lithuanian).
R. Karkauskas, M. Popov. Composition feature of the element tangent stiffness matrix of geometrically nonlinear 2D frame structures / R. Karkauskas, M. Popov // Mokslas- Lietuvos ateitis (Science – future of Lithuania): Statyba. Vilnius: Technika. ISSN 2029-2341. T. 1, nr. 5 (2009), p. 45-49. (in Lithuanian).
V. Jankovski, J. Atkočiūnas. Design of elastic-plastic steel frames in environment of MATLAB / Valentinas Jankovski, Juozas Atkočiūnas // Engineering structures: conference, held in Vilnius, at February 6, 2009 material / Vilnius : Technika, 2009. ISBN 9789955283966. p. 143-151. (in Lithuanian).
M. Popov, R. Karkauskas, J. Nagevičius. Optimization of 3D steel frames prior to plastic collapse Michail Popov, Romanas Karkauskas, Juozas Nagevičius // 10th International Conference Modern Building Materials, Structures and Techniques: May 19-21, 2010. Vilnius.
A. Grigusevičius, S. Kalanta. Optimization-based elastic-plastic analysis of steel frames by volumetric plasticity concept Andrius Grigusevičius, Stanislovas Kalanta // 10th International Conference Modern Building Materials, Structures and Techniques: May 19-21, 2010. Vilnius.
V. Popov, E. Jarmolajeva,A. Jarmolajev. Numerical analysis of steel frame behaviour subjected to fire temperature using general method approach Vladimir Popov, Ela Jarmolajeva, Andrej Jarmolajev // 10th International Conference Modern Building Materials, Structures and Techniques, May 19-21, 2010. Vilnius.
V. Jankovski, J. Atkočiūnas. Optimal shakedown design of steel frame structures by SAOSYS toolbox software / Valentinas Jankovski, Juozas Atkočiūnas // 10th International Conference Modern Building Materials, Structures and Techniques: selected papers, May 19-21, 2010. Vilnius.
V. Jankovski, V. Skaržauskas. The physically nonlinear contact analysis of circular plate on deformable foundation by ANSYS software Valentinas Jankovski, Valentinas Skaržauskas // 10th International Conference Modern Building Materials, Structures and Techniques. May 19-21, 2010. Vilnius.
R. Karkauskas, M. Popov. The optimization algorithm of the inelastic geometrically nonlinear frame structure considering maintenance requirements // OAS 2011 : International Conference on Optimization and Analysis of Structures. August 25-27, 2011 Tartu, Estonia Tartu : University of Tartu, 2011
G. Blaževičius; J. Atkočiūnas. Volume minimization of shakedown trusses by incremental method metodu // 14th conference of Lithuanian young scientists "Science - future of Lithuania" March 23-25, 2011, Vilnius.
J. Atkočiūnas; G. Blaževičius. Eurocode stability requirements in optimal shakedown truss design // The Eleventh International Conference on Computational Structures Technology, Dubrovnik, Croatia, 4-7 September 2012.
L. Liepa; R. Karkauskas. Design of elastic-plastic geometrically nonlinear frames // Mokslas – Lietuvos ateitis = Science – future of Lithuania: Statyba, transportas, aviacinės technologijos = Civil and transport engineering, aviation technologies. Vilnius. 2012. (in Lithuanian).
S. Kalanta, J. Atkočiūnas, T. Ulitinas. Equilibrium finite elements of spherical shells in analysis problems / Stanislovas Kalanta, Juozas Atkočiūnas, Tomas Ulitinas // 11th international conference on modern building materials, structures and techniques (MBMST), 2013. Amsterdam
T. Ulitinas. Optimized design and sensitivity analysis of elastic steel plane frames // MENDEL 2013: 19th international conference of soft computing, Brno, Czech Republic, June 26-28, 2013. Brno : Brno University of Technology, 2013. ISSN 1803-3814. ISBN 9788021445406. p. 409-414. [M.kr.: 02T; 09T]; [Aut. ind.: 1,000].
A. K. Kvedaras; G. Šaučiuvėnas; E. Jarmolajeva. Behaviour of hollow and solid concrete-filled circular steel tubular simple beams // Design, fabrication and economy of metal structures: international conference. Miskolc, Hungary, April 24-26, 2013.
A. Gervytė; E. Jarmolajeva. Optimization of elastic plastic bar structure taking into account strength, stiffness and stability // 16th conference of Lithuanian young scientists, March 20-22, 2013. Vilnius. (in Lithuanian).
I. Rimkus; Š. Kisevičius; S. Kalanta. Optimization of elastic bridge trusses // Mokslas – Lietuvos ateitis = Science – future of Lithuania: Statyba, transportas, aviacinės technologijos = Civil and transport engineering, aviation technologies. Vilnius. (in Lithuanian).
L. Liepa; A. Gervytė; J. Atkočiūnas. Qualitative analysis of residual displacements variation under repeated variable structural load // 17th Lithuanian conference of young scientists "Science - future of Lithuania" . "Statyba = Civil engneering", March 19-28, 2014, Vilnius. (in Lithuanian).
A. K. Kvedaras; G. Šiaučiuvėnas; A. Komka; E. Jarmolajeva. Circular composite beams with different concrete core // EUROSTEEL 2014: 7th European conferece on steel and composite structures, September 10-12, 2014, Naples, Italy.
Kvedaras, Audronis Kazimieras [Kvedaras, A.K.]; Šaučiuvėnas, Gintas [Šaučiuvėnas, G.]; Jarmolajeva, Ela [Jarmolajeva, E.]; Lenkimas, Tomas [Lenkimas, T.]. Behaviour of tempered and laminated glass plates with stress concentrators under different loads // Mechanics of composite materials : eighteenth international conference : June 2-6, 2014, Riga, Latvia Institute of Polymer Mechanics University of Latvia. Riga, 2014.
L. Liepa; A. Gervytė. Residual displacement analysis of structures at shakedown // Fifteenth international conference on civil, structural and environmental engineering computing, held in Prague, Czech republic from 1-4 September 2015.
O. Chabarova; E. Jarmolajeva. Optimization of elastic-plastic beam under displacements constraints // 18-osios Lietuvos jaunųjų mokslininkų konferencijos „Mokslas – Lietuvos ateitis“ teminė konferencija. Statyba, 2015 m. kovo 19 d, Vilnius = Proceedings of the 18th conference for junior researchers „Science – Future of Lithuania“. Civil engineering, 19 March 2015, Vilnius, Lithuania (in Lithuanian).
G. Blaževičius; J. Atkočiūnas. Optimal shakedown design of circular plates using a yield criterion of the mean // Mechanika'2015 : the 20th international scientific conference, 23, 24 April, 2015, Kaunas University of Technology, Lithuania.
P. Alawdin, L. Liepa. Shakedown optimization of the Thin-Wall Metal structures under strength and stiffness constrains // Metal structures 2016: the XIII international conference on Metal Structures (ICMS 2016, Zielona Góra, Poland, 15-17 June 2016).
G. Blaževičius; J. Atkočiūnas; L. Liepa; L. Rimkus; D. Merkevičiūtė. Solution validation technique for optimal shakedown design problems // Mechanika'2016: the 21th international scientific conference, 12-13, May, 2016, Kaunas University of Technology, Lithuania. Kaunas: Kauno technologijos universitetas, 2016.

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