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Bulletin of Earthquake Engineering

, Volume 17, Issue 7, pp 3847–3871 | Cite as

Assessing and quantifying the earthquake response of reinforced concrete buckling-restrained brace frame structures

  • Jiulin BaiEmail author
  • Feng Cheng
  • Shuangshuang JinEmail author
  • Jinping Ou
Original Research
  • 151 Downloads

Abstract

Due to the stable hysteretic behavior, buckling-restrained braces (BRB) have been increasingly adopted in reinforced concrete (RC) frame structures to develop a dual structural system. This investigation aims to quantify the seismic behavior of newly-constructed reinforced concrete BRB frames (RC-BRBFs). The force–deformation characteristic of dual RC-BRBFs is firstly presented and the yield displacement is derived using the story shear ratio resisted by BRB system. The seismic design procedure of dual systems for different BRB configurations (including single diagonal, V-type and inverted V-type), is developed using the performance-based plastic design approach by considering BRB postyield behavior, design target drift and global yield mechanism. 126 RC-BRBF structures corresponding to different story numbers, BRB configurations and story shear ratios are designed. The influence of story shear ratios on the design results is analyzed. The seismic response of structures subjected to 22 ground motions is investigated and compared in terms of yield mode, maximum interstory drift ratio, BRB maximum ductility and cumulative ductility, and residual drift ratio. The relationship between actual and design normalized story shear of BRBs is demonstrated and a fitting equation is proposed to quantify the actual story shear ratios. The analytical results of the present study can provide quantified insights to the seismic design of RC-BRBF structures.

Keywords

REINFORCED CONCRETE FRAMES Buckling-restrained braces Seismic performance Story shear ratio Dual system Seismic design 

Notes

Acknowledgements

This work was supported by National Natural Science Foundation of China (No. 51608073, 51708073), 111 Project of China (Grant No. B18062) and Chongqing Research Program of Basic Research and Frontier Technology (No. cstc2017jcyjAX0147 and cstc2018jcyjAX0331).

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Key Laboratory of New Technology for Construction of Cities in Mountain AreaChongqing University, Ministry of EducationChongqingChina
  2. 2.School of Civil EngineeringChongqing UniversityChongqingChina
  3. 3.School of Civil EngineeringChongqing Jiaotong UniversityChongqingChina
  4. 4.School of Civil EngineeringHarbin Institute of TechnologyHarbinChina

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