Intended contribution emphasizes the statics and kinematics of semi-rigid steel frames seismically acted upon. The dynamic model of analyzed structures consists of multi degree of freedom systems with lumped masses located at floor levels. The dynamic degrees of freedom are the lateral seismically induced floor displacements. A cyclic behavior of semi-rigid beam – column connections associated with the four parameters analytical bending moment M – relative rotation θr is considered. Time history seismic analyses are performed on multi-story steel planar frames equipped with several top and seat and web angle beam – column connections acted upon by recorded seismic actions. The computed numerical results refer to the contrary static and effects of semi-rigidity: the increase in lateral floor displacements accompanied by a decrease in the seismic base shear force. Relevant comments are drawn.
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European Commission-EUR 18366 Promotion of plastic design for steel and composite cross-sections: new required conditions in Eurocodes 3 şi 4 practical tools for designers. Technical steel research series Luxembourg 1998.
EN 1993-1-1 Design of steel structures-General rules and rules for buildings. CEN European Committee for Standardization 2004.
FEMA-350 Recommended seismic design criteria for new steel moment-frame buildings. Report No. FEMA-350 SAC Joint Venture Federal Emergency Management Agency Washington DC 2000.
Máthé Aliz Analiza elastică geometric neliniară a structurilor metalice cu conexiuni flexibile. (Nonlinear geometrical elastic analysis of semirigid connections). Phd. Thesis Technical University Cluj-Napoca 2009.
Cătărig A. Alexa P. Kopenetz L. Mathe Aliz Lădar Ioana Geomatrically Nonlinear Analysis of Semirigid Steel Struictures. International Seminar of IASS Polish Chapter XV Jubilee LSCE 2009 Warsaw 2009 pag.29-32.
Cătărig A. Mathe Aliz Chira N. Popa Anca Steel Structures with Semi-Rigid Connections. Analele Universităţii din Oradea Fascicula Construcţii şi Instalaţii hidroedilitare (University of Oradea Annals Journal of Civil engineering and installations Vol. XIII-2 2010 pag.21-32.
Máthé Aliz Cătărig Al. Răspunsul seismic al structurilor metalice multietajate semirigide. (Seismic response of multystorey steel structures with semirigid connections). A 14-a Conferinţă Naţională de Construcţii metalice (The 14-th National Conference on Steel Structures) Cluj-Napoca 2015.
Prodan O. Lădar Ioana Alexa P. Seismic Performances of Steel Structures with Supplementar Damping. Numerical Studies. 14th European Conference on Earthquake Engineering Ohrid Republic of Macedonia 2010 pp.476-482.
Mathe A. Blaga F. Semirigidity contribution to seismic behavior of steel structures. Lightweight structures in Civil Engineering XVI International Seminar of IASS-Polish Chapter Varsovia 2010 Vol. 16 pg. 63-69 Micro-Publisher-Consultant-Project.
Lădar Ioana Răspunsul seismic al structurilor metalica. O abordare energetică. (Seismic response on steel structures. An energetic approach). Phd. Thesis Technical University Cluj-Napoca 2013.
* * * P100 – 1/2013 Cod de proiectare seismică. Partea I – Prevederi de proiectare pentru clădiri.
Chopra A.K. Goel R.K. A Modal Pushover Analysis Procedure to Estimate Seismic Demands for Buildings: Theory and Preliminary evaluation. Report no. PEER 2001/3 Pacific Earthquake Engineering Research Centre University of California Berkeley C. A. 2001.
Richard R.M. Abbott B.J. Versatile elastic-plastic stress-strain formula. Journal of the Engineering Mechanics ASCE 101(4) 1975 pp.511-515.
Kishi N. Chen W.F. Moment-rotation relations of semi-rigid connections with angles. Journal of Structural Engineering ASCE 116(7) 1813-1834 1990.
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