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Damage-Free Seismic-Resistant Self-Centering Friction-Damped Braced Frames with Buckling-Restrained Columns

Blebo, Felix C
http://rave.ohiolink.edu/etdc/view?acc_num=akron1429538820

Abstract Details

2015, Doctor of Philosophy, University of Akron, Civil Engineering.
Conventional concentrically braced frame (CBF) systems have limited drift capacity prior to brace buckling, and related damage leads to deterioration in strength and stiffness. CBFs are also susceptible to weak story failure. A pin- supported self-centering friction-damped braced frame system with buckling-restrained columns (FDBF-BRC) is being developed to provide significant drift capacity while limiting damage due to residual drift and soft-story mechanisms. The FDBF-BRC system consists of beams, columns, and braces branching off a central column, with buckling restrained columns (BRCs) incorporated into the system at the first story external column positions. The BRCs and friction generated at lateral-load bearings at each floor level are used to dissipate energy to minimize the overall seismic response of the FDBF-BRC system. Vertically aligned post-tensioning bars provide additional overturning moment resistance and aid in self-centering the system to eliminate residual drift. The pin support condition and the lateral stiffness of the system enable it to exhibit a nearly uniform inter-story drift distribution. In this study, a suite of 44 DBE-level ground motions used in FEMA P695 is numerically applied to several FDBF- BRCs to demonstrate the seismic performance of the system. The results show that the FDBF-BRC system has a nearly uniform inter-story drift response, high ductility, and a high energy dissipation capacity, and is an effective seismic-resistant system.
David Roke, Dr. (Advisor)
Craig Menzemer, Dr. (Committee Member)
Qindan Huang, Dr. (Committee Member)
Xiaosheng Gao, Dr. (Committee Member)
Desale Habtzghi, Dr. (Committee Member)
172 p.
Civil Engineering; Engineering
Post-tensioned steel braced frame, self-centering; friction damping; seismic-resistant; buckling-restrained column; buckling-restrained braces; soft story failure; residual drift; damage free seismic reistant systems

Recommended Citations

Citations

  • Blebo, F. C. (2015). Damage-Free Seismic-Resistant Self-Centering Friction-Damped Braced Frames with Buckling-Restrained Columns [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1429538820

    APA Style (7th edition)

  • Blebo, Felix. Damage-Free Seismic-Resistant Self-Centering Friction-Damped Braced Frames with Buckling-Restrained Columns . 2015. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1429538820.

    MLA Style (8th edition)

  • Blebo, Felix. "Damage-Free Seismic-Resistant Self-Centering Friction-Damped Braced Frames with Buckling-Restrained Columns ." Doctoral dissertation, University of Akron, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1429538820

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Akron and OhioLINK.