Direct displacement‐based design of steel‐braced reinforced concrete frames

SUMMARY This study investigates a direct displacement-based design procedure for dual system structures composed of reinforced concrete frames and steel bracings. In this procedure, in order to establish the design displacement profile before any analysis, strength proportions between bracings and frames are assigned. By using the displacement profile and damping characteristics of the structural components, the structure can be represented as an equivalent single-degree-of-freedom system. The effective period and secant stiffness of the structure are then calculated, and finally, after the base shear was computed, the design process can be implemented. Structures with 4, 8 and 12 stories have been designed using this methodology, and in order to validate it, seven accelerograms have been used for nonlinear time-history analysis of the above structures. The results demonstrate the efficiency of this procedure. Copyright © 2012 John Wiley & Sons, Ltd.

[1]  James O Jirsa,et al.  Steel Bracing of RC Frames for Seismic Retrofitting , 1990 .

[2]  Gian Michele Calvi,et al.  Introduction to a Model Code for Displacement-Based Seismic Design , 2010 .

[3]  Mahmoud R. Maheri,et al.  Connection overstrength in steel-braced RC frames , 2008 .

[4]  Mahmoud R. Maheri,et al.  Mechanical compression release device in steel bracing system for retrofitting RC frames , 2006 .

[5]  Mervyn J. Kowalsky,et al.  Direct displacement-based seismic design of concrete buildings , 2000 .

[6]  Gian Michele Calvi,et al.  DIRECT DISPLACEMENT-BASED DESIGN OF FRAME-WALL STRUCTURES , 2006 .

[7]  Mahmoud R. Maheri,et al.  Use of steel bracing in reinforced concrete frames , 1997 .

[8]  Walter J Silva,et al.  State-of-the-Art for Assessing Earthquake Hazards in the United States. Report 24. WES RASCAL Code for Synthesizing Earthquake Ground Motions. , 1987 .

[9]  Anil K. Chopra,et al.  Direct Displacement-Based Design: Use of Inelastic vs. Elastic Design Spectra , 2001 .

[10]  Mervyn J. Kowalsky,et al.  Displacement-based design of RC bridge columns in seismic regions , 1995 .

[11]  Mjn Priestley,et al.  VISCOUS DAMPING IN SEISMIC DESIGN AND ANALYSIS , 2005 .

[12]  Gian Michele Calvi,et al.  Displacement-based seismic design of multi-degree-of-freedom bridge structures , 1995 .

[13]  Andrea Belleri,et al.  Displacement Based Design for Precast Concrete Structures , 2009 .

[14]  Gaetano Della Corte,et al.  Development of a Displacement-Based Design Method for Steel Frame-RC Wall Buildings , 2010 .

[15]  Mete A. Sozen,et al.  SUBSTITUTE-STRUCTURE METHOD FOR SEISMIC DESIGN IN R/C , 1976 .

[16]  J. P. Moehle,et al.  Displacement-Based Design of RC Structures Subjected to Earthquakes , 1992 .

[17]  Gian Michele Calvi,et al.  Displacement‐Based Design of Precast Walls with Additional Dampers , 2009 .

[18]  Andrea Belleri,et al.  Direct displacement based design and force based design of precast concrete structures , 2008 .

[19]  Mahmoud R. Maheri,et al.  Cyclic Tests on the Internally Braced RC Frames , 2006 .