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سازه های مهندسی
جزئیات رویداد
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همایش ، رویداد ، ژورنال
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  • evaluation of buckling-restrained braced frame seismic performance considering reserve strength

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 907
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     buckling-restrained braced frame (brbf) systems are used extensively for resisting lateral forces in high seismic regions of the united states. numerical and large-scale experimental studies of brbfs have shown predictable seismic performance with robust ductility and energy dissipation capacity. however, the low post-yield stiffness of buckling-restrained braces (brbs) may cause brbfs to exhibit large maximum and residual drifts and allow the formation of soft stories. thus, reserve strength provided by other elements in the lateral-force-resisting system is critical to improving seismic performance of brbfs. this reserve strength can be provided in two primary ways: (1) moment-resisting connections within the brbf and (2) a steel special moment-resisting frame (smrf) in parallel with the brbf to create a dual system configuration. these two approaches to providing reserve strength can be used together or separately, leading to a variety of potential system configurations. in addition, special attention must be given to the connections within the brbf since moment-resisting connections have been observed experimentally to limit drift capacity due to undesirable connection-related failure modes. this paper presents nonlinear dynamic analysis results and evaluates performance of brbf and brbf–smrf systems using moment-resisting and non-moment-resisting beam–column connections within the brbf. reserve strength is shown to play a critical role in seismic behavior and performance of brbfs.

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