Performance-based design approach for ductile knee-braced moment frames
Conference proceedings article
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Publication Details
Author list: Leelataviwat S., Srichai J., Suksen B., Warnitchai P.
Publisher: Hindawi
Publication year: 2010
Volume number: 7
Start page: 5654
End page: 5663
Number of pages: 10
ISBN: 9781617388446
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
This paper discusses a design approach for a structural system called knee-braced moment frame (KBMF). In the first part of the paper, the concept of KBMF is first introduced. KBMF rely on moment resisting frames together with stocky knee braces as means to resist seismic forces. For KBMF, the frames are designed with a selected yield mechanism in which the knee braces yield and buckle along with plastic hinging of beams at the ends of the beam segments outside the knee portions. The second part of the paper focuses on the design of KBMF based on an innovative design methodology called Performance-Based Plastic Design (PBPD). The design forces are derived based on the selected yield mechanism and target displacement limit using the energy balance concept. An example of KBMF frame designed by the PBPD method is then presented. The results from the dynamic analysis of the KBMF indicate that the proposed framing system designed by PBPD approach behaves in a predictable manner with a stable hysteretic characteristic. The proposed system represents a viable alternative to existing structural systems.
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