The influence of different instability modes on the behaviour and design of thin-walled steel structuresDefinition of thin-walled members Types of instabilities Overall instability of a structure Global buckling of a member Local and distortional buckling of thin-walled members Post-buckling strength in designing steel structures Structural sensitivity to imperfections Advanced analysis of the behaviour of structures under loading General characteristics of steel structures revealing post-buckling reserve of strength References Design of thin-walled steel girders Behaviour of thin-walled steel girders in bending Finite element method for stability and strength analysis Introduction Examples of finite element analysis Designing transversally stiffened steel girders according to EN 1993-1-5 Basis of design Effective width method General reąuirements and resistance to direct stresses Effective cross section Web buckling and cross-section resistance regarding shear Interaction between shear force and bending moment in a web panel Resistance of steel girders in bending and compression Introduction Numerical models and their calibration Ultimate limit state calculations Assumptions applied in draft of Eurocode 3 (1992) Assumptions of Vlasov 's theory Influence of torsion on carrying capacity of girders Realization of torsion Results Girders in torsion. Conclusions Post-buckling behaviour of steel thin-walled columns Influence of imperfections Influence of stiffeners Web slenderness Interaction of local and global buckling Columns. Conclusions Behaviour of a steel thin-walled girder with a very slender web under cyclic load Numerical model Cyclic load Comment on the results for cyclic loading Plate girders with corrugated webs. Usage and design General characteristic of plate girders with corrugated webs Fabrication process of sin-girders Corrugated girders as basie building structural elements Carrying-capacity of plate girders with corrugated webs Analytical approach in codification General assumptions Moment a resistance about major axis Shear resistance in bending about major axis Resistance to concentrated loads transferred onto the web Interaction of bending and shear Effect of the corrugated web opening on the girder behaviour and resistance Analysis of the behaviour of sin-girders under patch loading Application of cold-formed products Types ofcold formed products. Conseąuences of manufacturing Typical products Residual stresses as effect of cold-forming Average yield strength Materials and fasteners for thin-walled assemblages Materials Non-conventional fasteners Fields of application of cold-formed steel members Piane load-bearing members Linear members New possibilities of hall design with primary bearing elements made of cold-formed members Characterisic behaviour of cold-formed members under loading Comparison with conventional steel members Numerical analysis of a zed purlin behaviour Simplified analytical models for the assessment of the carrying- -capacity of cold-formed members Interaction between cold-formed zed-purlins and steel roof sheeting under loading Introduction Experimental investigations Numerical models Analytical calculations Conclusion and finał remarks Application of cold-formed members in structures Advantages Good practice notes References Adhesive bonding in connecting and strengthening steel thin-walled Structures Introduction Basic dilemmas of application of adhesive bonding in structural connections Selection of an adhesive Assessment of mechanical properties of adhesives Technological and structural limitations General designing rules Influence of assembling technology Influence of enviromental conditions and types of loads Effects of temperaturę on mechanical properties of glues Example of the influence of elevated temperaturę on the behaviour of a lap adhesive joint Influence of long-term and cyclic or dynamie loading Design methods for adhesive connections Analytical solutions Numerical methods Handbook and standard approaches Examples of application of adhesive connections in thin-walled steel building structures Facades on steel frameworks Cold folded profiles and their strengthening Plate girders and their strengthening Celluar beam systems and steel-polymer-steel systems