Abstract
To enhance the theoretical basis for the half-wavelength evaluation of high-order local buckling of section steel used as inner core of buckling-restrained brace, this paper conducts theoretical and numerical studies on the local buckling development of an H-section steel core of buckling restrained brace. Firstly, the elastic buckling development of the flange under monotonic compression is theoretically discussed based on the elastic buckling theory of plate and the principle of virtual displacement. The numerical model for the buckling restrained brace with H-section steel core is then established based on Abaqus, and the elastic buckling development of the flange is validated. Finally, further numerical studies are conducted to reveal the elasto-plastic buckling development of the flange and web under cyclic loading. It is found that the local buckling development of the flange and web of the H-section steel core are different from that of the flat plate core of buckling restrained brace. Under cyclic loading, the shortest buckling wave of the flange and web are induced by the buckling of plates on the two sides of the contact point near the ends. It is confirmed that there is no need to consider the lateral support from the restraining members to evaluate the minimum half-wavelength of high-order local buckling for section steel core of buckling-restrained brace.
Highlights
Buckling-restrained braces (BRBs) have been widely used to improve the seismic performance of engineering structures for their excellent energy dissipation capability [1,2,3].A well designed BRB can yield both in tension and compression and provides stable elasto-plastic hysteretic behaviors
In BRBs, the inner core is continuously restrained by the restraining members, and due to the lateral support provided by the restraining members, the buckling wave of the flat plate core might be twice as long as that calculated based on the classical
Large amounts of studies have been conducted on this aspect, the classical buckling theory of plate with no lateral supports considered can well predict most of them focused on the flat plate core, and the research on section steel the half-wavelength of higher-order local buckling of section steel core, it still seems to be cores were rather limited [28]
Summary
Buckling-restrained braces (BRBs) have been widely used to improve the seismic performance of engineering structures for their excellent energy dissipation capability [1,2,3]. Large amounts of studies have been conducted on this aspect, the classical buckling theory of plate with no lateral supports considered can well predict most of them focused on the flat plate core, and the research on section steel the half-wavelength of higher-order local buckling of section steel core, it still seems to be cores were rather limited [28]. Classical buckling theory of plate with no lateral supports considered can well predict the Against this background, this paper conducts theoretical and numerical investigahalf-wavelength of higher-order local buckling of section steel core, it still seems to be tions on the local buckling development of an H-section steel core of BRB, to enhance the doubtful and theoretically defective. The rationality existing half-wavelength evaluation method for higher-order local buckling of section steel cores of BRBs with no lateral supports considered is proved
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
