Developing a Lateral Load Pattern for Pushover Analysis of EBF System

Finding an appropriate system to absorb the intended energy of the earthquake is of great importance in seismic region. The eccentric bracing frame (EBF) is one of the structural systems that reveal proper behavior during earthquakes phenomenon. In doing so, design codes attempt to optimize EBF seismic behave to avoid failure of the earthquake regarding a set of the criteria. Indeed, the dynamic nonlinear approaches are the most powerful methods which solve the motion equations based on the time history of the ground motion. However, the dynamic nonlinear methods require a rigorous effort to nail the structural responses. Therefore, there is a need to develop a simplified approach such a pushover method which is based on the non-linear static analysis. The main attempt of this research is to present a simplified push overload pattern for EBF system to sufficiently divulge the structural performance subjected to the seismic loadings. In this investigation, three models of the middle rise and tall rise, 10, 20, 30 stories of buildings are considered, which are designed according to the available codes. Accordingly, several different load patterns are developed. The idea behind of each proposed load patterns inspired by the deflection of a rod subjected to the flame. Herein, the meaning of the flame refers to the region of the structures which is subjected to the plastic hinges.

[1]  Shen Li,et al.  Performance-based seismic design of eccentrically braced steel frames using target drift and failure mode , 2017 .

[2]  Andrzej S. Nowak,et al.  Mean maximum values of non-normal distributions for different time periods , 2016 .

[3]  Payam Ashtari,et al.  Combinatorial continuous non-stationary critical excitation in M.D.O.F structures using multi-peak envelope functions , 2014 .

[4]  Andrzej S. Nowak,et al.  Reliability index for non-normal distributions of limit state functions , 2017 .

[5]  Farzad Naeim,et al.  The Seismic Design Handbook , 1989 .

[6]  Vincenzo Piluso,et al.  Influence of the bracing scheme on seismic performances of MRF-EBF dual systems , 2017 .

[7]  C. Allin Cornell,et al.  SEISMIC PERFORMANCE EVALUATION FOR STEEL MOMENT FRAMES , 2002 .

[8]  Pier Paolo Rossi,et al.  Proposal of modifications to the design provisions of Eurocode 8 for buildings with split K eccentric braces , 2014 .

[9]  Helmut Krawinkler,et al.  PROS AND CONS OF A PUSHOVER ANALYSIS OF SEISMIC PERFORMANCE EVALUATION , 1998 .

[10]  Andrzej S. Nowak,et al.  Reliability Analysis for Serviceability Limit State of Bridges Concerning Deflection Criteria , 2016 .

[11]  Sashi K. Kunnath,et al.  Adaptive Spectra-Based Pushover Procedure for Seismic Evaluation of Structures , 2000 .

[12]  Seyed Hooman Ghasemi,et al.  Seismic design of structures using a modified non-stationary critical excitation , 2013 .

[13]  Egor P. Popov,et al.  Seismic eccentrically braced frames , 1988 .

[14]  Andrzej S. Nowak,et al.  Reliability analysis of circular tunnel with consideration of the strength limit state , 2018 .

[15]  Vincenzo Piluso,et al.  Validation of a Design Procedure for Failure Mode Control of EB-Frames: Push-Over and IDA Analyses , 2013 .

[16]  Pier Paolo Rossi,et al.  Influence of modelling of steel link beams on the seismic response of EBFs , 2016 .

[17]  Seyed Hooman Ghasemi.  Target Reliability Analysis for Structures , 2015 .