IMPACT OF USING KNEE ELEMENTS TO IMPROVE CYCLIC PERFORMANCE OF CHEVRON & DIAGONAL BRACED STEEL FRAMES

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ZAHRAI SEYED MEHDI; MASJEDBARI SAEED BAHRAM

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Journal: AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR) Year:2011 | Volume:43 | Issue:1 Page(s): 51-59

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Title

IMPACT OF USING KNEE ELEMENTS TO IMPROVE CYCLIC PERFORMANCE OF CHEVRON & DIAGONAL BRACED STEEL FRAMES

Author(s)

ZAHRAI SEYED MEHDI | MASJEDBARI SAEED BAHRAM | Issue Writer Certificate

Keywords

DIAGONAL BRACINGQ2

CHEVRON BRACINGQ2

KNEE ELEMENTQ2

HYSTERETIC CURVEQ3

STRESS CONTOURQ2

DUCTILITYQ2

Abstract

Braced frames have been known as frequently used earthquake resistant systems. If a limited length of a member in such a bracing system can undergo ductile behavior, the structure would sustain in a reliable performance, dissipating a large amount of seismic energy during earthquake. Knee Braced Frames, KBFs, are among the ductile systems having such mechanisms. In this paper, single-story single-bay steel Diagonal and Chevron Knee Braced Frames (DKBF & CKBF) with different configurations have been modeled using ANSYS software and their lateral behavior have been studied and compared. Comparing the HYSTERETIC CURVEs and DUCTILITY factors, better performance of CKBF compared with DKBF has been found due to its more KNEE ELEMENTs and thus having higher damping. In two similar frame configurations, CKBF1 reaches to 25 mm displacement while DKBF2 displacement limits to 15 mm, such that following the same loading protocol, DUCTILITY factor of CKBF1 is 60% more than that of DKBF2.Comparing VonMises and shear STRESS CONTOURs for KNEE ELEMENTs, shows the fact that the more symmetric the KBF, the more efficient the KNEE ELEMENT in dissipating energy leading to using the whole section capacity.

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APA: Copy

ZAHRAI, SEYED MEHDI, & MASJEDBARI, SAEED BAHRAM. (2011). IMPACT OF USING KNEE ELEMENTS TO IMPROVE CYCLIC PERFORMANCE OF CHEVRON & DIAGONAL BRACED STEEL FRAMES. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), 43(1), 51-59. SID. https://sid.ir/paper/165838/en

Vancouver: Copy

ZAHRAI SEYED MEHDI, MASJEDBARI SAEED BAHRAM. IMPACT OF USING KNEE ELEMENTS TO IMPROVE CYCLIC PERFORMANCE OF CHEVRON & DIAGONAL BRACED STEEL FRAMES. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR)[Internet]. 2011;43(1):51-59. Available from: https://sid.ir/paper/165838/en

IEEE: Copy

SEYED MEHDI ZAHRAI, and SAEED BAHRAM MASJEDBARI, “IMPACT OF USING KNEE ELEMENTS TO IMPROVE CYCLIC PERFORMANCE OF CHEVRON & DIAGONAL BRACED STEEL FRAMES,” AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), vol. 43, no. 1, pp. 51–59, 2011, [Online]. Available: https://sid.ir/paper/165838/en

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