EVALUATION OF DIRECT-DISPLACEMENT BASED SEISMIC DESIGN METHOD FOR EBFs

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EVALUATION OF DIRECT-DISPLACEMENT BASED SEISMIC DESIGN METHOD FOR EBFs

Amin MOHEBKHAH Assistant Professor of Structural Eng., Dept. of Civil Eng., Malayer University, Malayer, Iran amoheb@malayeru.ac.ir Sina FARAHANI M.Sc. Student of Structural Engineering, Dept. of Civil Eng., Malayer University, Malayer, Iran sina_farahani459@yahoo.com, sina.farahani@stu.malayeru.ac.ir Keywords: Direct displacement-based design, Steel eccentrically braced frame, Seismic behavior, Nonlinear dynamic analysis, Performance level

 

Recent research in the field of earthquake engineering has seen the development of number of different displacementbased seismic design (DBD) methods. Such methods aim to overcome limitations with the force-based design methods incorporated in current codes. The most developed DBD method currently available is the Direct DBD approach, described and investigated in a text by Priestley et al. (2007). While the guidelines in the DDBD code have been relatively well tasted for RC structures, further verification and development is required for steel frame systems. There is just one comprehensive study can be found on DDBD of eccentrically braced frames (EBFs) which has been published recently by Sullivan (2013). The study presented by Sullivan (2013), has been focused of DDBD of EBFs with short (shear) link beams. Therefore, the aim of present study is to evaluate the ability of DDBD method for designing EBFs with intermediate and long link beams. To this end, three five-storey EBFs with short, intermediate and long link beams designed using the DDBD method proposed by Sullivan (2013). Figure 1 shows the case study EBF structures selected for examination in this paper.

 

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