Proposal of modifications to the design provisions of Eurocode 8 for buildings with split K eccentric braces

This paper evaluates the effectiveness of the procedure suggested in Eurocode 8 for the design of eccentrically braced structures and compares the seismic response of buildings designed according to this procedure to the response of buildings designed according to the modifications proposed by the Authors. The proposed procedure modifies that of Eurocode 8 in order to fill gaps and make the new procedure consistent with the intent of the code. The seismic response of the buildings is obtained by incremental dynamic analysis. To ensure the general validity of the results, the buildings are considered to be founded on hard or soft soil and are characterised by different values of the link length and number of storeys.

[1]  Ian G. Buckle,et al.  Cyclic Behavior of Shear Links of Various Grades of Plate Steel , 2010 .

[2]  Michael D. Engelhardt,et al.  Cyclic loading behavior of EBF links constructed of ASTM A992 steel , 2007 .

[3]  Michael D. Engelhardt,et al.  Experimental investigation of link-to-column connections in eccentrically braced frames , 2009 .

[4]  Pier Paolo Rossi,et al.  A design procedure for tied braced frames , 2007 .

[5]  Pier Paolo Rossi,et al.  A design procedure for dual eccentrically braced systems: Numerical investigation , 2013 .

[6]  Egor P. Popov,et al.  Characteristics of eccentrically braced frames , 1984 .

[7]  Frieder Seible,et al.  CYCLIC TESTING OF BUILT-UP STEEL SHEAR LINKS FOR THE NEW BAY BRIDGE , 2003 .

[8]  Egor P. Popov,et al.  On Design of Eccentrically Braced Frames , 1989 .

[9]  Amr S. Elnashai,et al.  Seismic response of composite frames—II. Calculation of behaviour factors , 1996 .

[10]  G. Della Corte,et al.  Analytical and numerical study of plastic overstrength of shear links , 2013 .

[11]  Ahmad M. Itani,et al.  Analytical evaluation of built-up shear links under large deformations , 2003 .

[12]  Carlo Poggi,et al.  Indagine Statistica sulle proprietà meccaniche degli acciai da costruzione , 1993 .

[13]  Melina Bosco,et al.  Design method and behavior factor for steel frames with buckling restrained braces , 2013 .

[14]  Edoardo M. Marino.  A unified approach for the design of high ductility steel frames with concentric braces in the framework of Eurocode 8 , 2014 .

[15]  Pier Paolo Rossi,et al.  Influence of the link overstrength factor on the seismic behaviour of eccentrically braced frames , 2007 .

[16]  Edoardo M. Marino,et al.  Seismic performance and new design procedure for chevron-braced frames , 2006 .

[17]  Ulf Wickström,et al.  Comments on calculation of temperature in fire-exposed bare steel structures in prEN 1993-1-2: Eurocode 3—design of steel structures—Part 1–2: general rules—structural fire design , 2005 .

[18]  Ahmed Y. Elghazouli.  Assessment of European seismic design procedures for steel framed structures , 2009 .

[19]  Pier Paolo Rossi,et al.  A design procedure for dual eccentrically braced systems: Analytical formulation , 2013 .

[20]  Sherif El-Tawil,et al.  Ductile Web Fracture Initiation in Steel Shear Links , 2006 .

[21]  Masanobu ShinozukaPrincipal Investigator.  Earthquake Engineering Research Center , 2014 .

[22]  R Tremblay,et al.  Achieving a Stable Inelastic Seismic Response for Multi-Story Concentrically Braced Steel Frames , 2003 .

[23]  James M. Ricles,et al.  Composite Action in Eccentrically Braced Frames , 1989 .

[24]  Pier Paolo Rossi,et al.  Seismic behaviour of eccentrically braced frames , 2009 .

[25]  Pier Paolo Rossi,et al.  An accurate strength amplification factor for the design of SDOF systems with P–Δ effects , 2014 .

[26]  Federico M. Mazzolani,et al.  Behaviour of Steel Structures in Seismic Areas , 2014 .

[27]  Federico M. Mazzolani,et al.  Experimental analysis of steel dissipative bracing systems for seismic upgrading , 2009 .

[28]  Egor P. Popov,et al.  Cyclic Web Buckling Control for Shear Link Beams , 1986 .

[29]  Egor P. Popov,et al.  General Behavior of WF Steel Shear Link Beams , 1986 .

[30]  Egor P. Popov,et al.  Design considerations for shear links in eccentrically braced frames , 1983 .

[31]  Federico M. Mazzolani,et al.  EUROCODE 8 PROVISIONS FOR STEEL AND STEEL-CONCRETE COMPOSITE STRUCTURES: COMMENTS, CRITIQUES, IMPROVEMENT PROPOSALS AND RESEARCH NEEDS , 2009 .

[32]  Michael D. Engelhardt,et al.  Experimental Study of Local Buckling, Overstrength, and Fracture of Links in Eccentrically Braced Frames , 2005 .

[33]  Monica Bosco,et al.  Seismic response of dual eccentrically braced systems designed by Eurocode 8 , 2012 .

[34]  Egor P. Popov,et al.  Shear Links in Eccentrically Braced Frames , 1984 .

[35]  Keiichiro Suita,et al.  Experimental Performance of Link-to-Column Connections in Eccentrically Braced Frames , 2006 .

[36]  Chia-Ming Uang,et al.  Effect of Flange Width-Thickness Ratio on Eccentrically Braced Frames Link Cyclic Rotation Capacity , 2005 .