[1]YU Jian,ZHAO Licai.Research on Damping Performance Design of BRB Frame-shear Structure by Near-fault Pulse-like Ground motions[J].Journal of Seismological Research,2023,46(04):575-585.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0051
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Research on Damping Performance Design of BRB Frame-shear Structure by Near-fault Pulse-like Ground motions
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
46
Number of periods:
2023 04
Page number:
575-585
Column:
Public date:
2023-07-15
- Title:
- Research on Damping Performance Design of BRB Frame-shear Structure by Near-fault Pulse-like Ground motions
- Keywords:
- pulse-like ground motion; frame-shear structure; buckling restrained braces; damping performance
- CLC:
- P315.925
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2023.0051
- Abstract:
- Pulse-like ground motions exert extremely strong destructive force on building structures.The elastic-plastic dynamic time-history analysis of the typical frame-shear structure and several buckling restrained braces(BRB)shock-absorbing design structures subjected to the pulse-like and non-pulse-like ground motions is carried out.Based on the story drift ratio,the structural damage degree,and the structural energy consumption index,the seismic performance of different BRB frame-shear structures is compared and analyzed.The analysis shows that,due to the improvement of lateral stiffness,the added BRB can help to effectively reduce the story drift ratio response of the frame-shear structure subjected to the pulse-like ground motions,and make the structure meet the limit requirement in the Code.Instead of being arranged on the periphery,the BRB arranged in the inner frame of the shock-absorbing structure can help to reduce more effectively the serious damage to the upper-floor beam members of the structure subjected to the pulse-like ground motions,and reduce the proportion of the serious damage to the beam members from 71% to less than 45% as a whole,and effectively reduce the moderate- and serious-damage to the vertical members.Pulse-like ground motions can weaken the plastic energy-dissipation capacity of BRB in shock-absorbing structures while the non-pulse-like ground motions cannot.In general,when the structure is arranged with BRB in the inner frame,and the structure's initial stiffness and yield strength are divided by more floor zones,the smaller post-yield stiffness ratio would show higher damping performance subjected to the pulse-like ground motions.
- References:
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Last Update:
2023-10-01