Current research of Division of Metal Structures at Poznan University of Technology

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1 Current research of Division of Metal Structures at Poznan University of Technology Ph. D., Dr. Sc. Katarzyna RZESZUT Institute of Structural Engineering METNET KEMI

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3 Institute of Structural Engineering Division of Metal Structures Research Team Ph. D., Dr. Sc. Maciej SZUMIGAŁA - Professor Ph. D., Dr. Sc. Katarzyna RZESZUT - Assistant Professor Ph. D. Marcin CHYBIŃSKI - Assistant Professor Ph. D. Robert STUDZIŃSKI - Assistant Professor M. Sc. Katarzyna CIESIELCZYK - Assistant M. Sc. Łukasz POLUS - Assistant 3

4 AIM Understanding and describing the phenomenon of mechanical, kinematical and stability response of steel structural elements REASERCH Experimental tests: material tests full scale Numerical simulations Abaqus/CEA veryfication and validation convergance analysis of the FE models

5 FEM model Buckling mode Real structure with clearances Z-purlins: Trapezoidal sheet Double sigma Nonlinear FEM analysis l/l cr 1 0,9 0,8 0,7 0,6 0,5 0,4 0,3 1l 1g 2l 2g 3l 3g 0,2 0, ,5 7,5 12,5 17,5 22,5 Displacement parameter 5

6 Model structure Elastic support with clearances R u k u for u n n n 0 n 0 R u 0 for u n 0 n 0 R u k u for u n n n 0 n 0 Virtual deformations, variation of a) u 1, b) of u 2 Numerical example Virtual work equations M M P u R u x y M M M P u R u x y M M P u R u x y

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8 Failure maps shear Pareto optimization of: - support model - geometric and material parameters wrinkling FEA and laboratory tests 8 8

9 AIM Understanding and describing the phenomenon of global and local loss of stability of thin-walled beams interacting with sandwich panels Experimental tests: material tests full scale (Fig. 1) double lap shear test Numerical simulations (Fig. 2) Abaqus/CEA veryfication and validation convergance analysis of the FE models 9

10 AIM Understanding and describing the mechanical and kinematical response of the sandwich panels with hybrid cores Experimental tests: material tests four point bending test (Fig. 1) Numerical simulations (Fig. 2) Abaqus/CEA veryfication and validation convergance analysis of the FE 10 models

11 s y 43A t 44B t 43B s y s x 44B 43A sx 44B t 43A t 44A s x 43B s y 43B s y 44A s x 44A s x 44A s y 44A t 44A s x 44B s y 44B t 44B s x 43A s y 43A t 43A FEA and laboratory full scale tests Side A s x 43B s y 43B t 43B Side B stiffe ning ribs Stress in web 11

12 AIM An analysis of load bearing capacity and stiffness { Test of the shear connectors FEA and laboratory full scale tests Test of the composite beams A prototype of the connector 12

13 Fire Dynamics Symulator Fire in the shopping arcade FEM and EC Analysis Bus fire Yeld stresses Critical temperature: 450 C 13

14 AIM Formulation of interdisciplinary problem regarding analysis of state and response of structures in fire Modelling and numerical analysis of fire course with respect to dynamics of fire actions and mechanical response of structure locally affected by high temperature Mechanical analyses of the real buildings subjected to localized fire Thermal exposure of elements in the vicinity of fire can be significant Other parts of structure can be barely affected by temperature Research objectives Fire modelling Structural analysis CFD Thermal boundary conditions FEM 14

15 Experimental programe 15 15

16 Validation of Heat Transfer Model 16

17 Thank you for your attention Ph. D., Dr. Sc. Katarzyna RZESZUT Institute of Structural Engineering METNET KEMI

18 REFERENCES 1. Rzeszut K., A.Garstecki, Thin-walled structures with slotted connections in stability problems,. Thin- Walled Structures 49 (2011) TWS Rzeszut K., Garstecki A., Stability of steel structures with clearances and imperfections. Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering Held in Crete, Greece 5-10 June 2016, ISBN: s Garstecki A., Rzeszut K., Polus Ł., Klój M., Terech M., The impact of fire situation on the static and stability response of the bearing steel structure, In: Kleiber M., Burczyński T., Wilde K., Górski J., Advances in Mechanics: Theoretical, Computational and Interdisciplinary Issues, Advances in Mechanics: Theoretical, Computational and Interdisciplinary, s , Ciesielczyk K., Rzeszut K., Local and distortional buckling of axially loaded cold rolled sigma profiles, Acta Mechanica et Automatica, volume 10, Issue 3, p DOI: /ama Studziński R., Pozorski Z., Experimental and numerical analysis of sandwich panels with hybrid core, Journal of Sandwich Structures and Materials, Studziński R., Experimental analysis of sandwich panels with hybrid core made of aerogel and polyurethane foam, Modern Building Materials, Structures and Techniques, MBMST Ciesielczyk K., Studziński R., Experimental and numerical investigation of stabilization of thinwalled Z-beams by sandwich panels, Journal of Constructional Steel Research, 133, pp , Studziński R., Ciesielczyk K., Experimental investigation of the stabilization of the C-section purlins by sandwich panels, Recent Progress in Steel and Composite Structures: Proceedings of the XIII International Conference on Metal Structures, pp , CRC Press,