TY - JOUR
T1 - Eurocode-8-conforming seismic design and behaviour factor of high-post-yield stiffness concentrically-braced steel frames
AU - Hassan, Mahmoud
AU - Vasdravellis, George
AU - Vamvatsikos, Dimitrios
N1 - Funding Information:
The third author acknowledges the support provided by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “2nd Call for H.F.R.I. Research Projects to support Faculty Members & Researchers”, Project “TwinCity: Climate‐Aware Risk and Resilience Assessment of Urban Areas under Multiple Environmental Stressors via Multi‐Tiered Digital City Twinning” (Number: 2515).
Publisher Copyright:
© 2023 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.
PY - 2023/4/25
Y1 - 2023/4/25
N2 - A seismic-resistant steel frame with energy-dissipating, chevron-type braces is proposed. The braces are equipped with replaceable hourglass-shaped pins made of duplex stainless steel. Under design seismic loading, energy is dissipated through inelastic deformations confined in the replaceable pins while the other members remain essentially elastic. As a result, the frame exhibits high post-yield stiffness due to the inherent properties of the stainless-steel pins. A Eurocode-8-based design methodology is adopted for the frame and assessed following the Eurocode-8-compatible INNOSEIS approach. Specifically, the overstrength factor is evaluated through nonlinear pushover analysis while the behaviour factor is assessed through incremental dynamic analysis considering high and medium seismicity site-specific ground motion suites. The determined behaviour factor satisfies the global collapse prevention and life safety objectives while also keeping the maximum residual inter-storey drifts below 1/300 to permit an easy substitution of the damaged pins after the design level earthquake.
AB - A seismic-resistant steel frame with energy-dissipating, chevron-type braces is proposed. The braces are equipped with replaceable hourglass-shaped pins made of duplex stainless steel. Under design seismic loading, energy is dissipated through inelastic deformations confined in the replaceable pins while the other members remain essentially elastic. As a result, the frame exhibits high post-yield stiffness due to the inherent properties of the stainless-steel pins. A Eurocode-8-based design methodology is adopted for the frame and assessed following the Eurocode-8-compatible INNOSEIS approach. Specifically, the overstrength factor is evaluated through nonlinear pushover analysis while the behaviour factor is assessed through incremental dynamic analysis considering high and medium seismicity site-specific ground motion suites. The determined behaviour factor satisfies the global collapse prevention and life safety objectives while also keeping the maximum residual inter-storey drifts below 1/300 to permit an easy substitution of the damaged pins after the design level earthquake.
KW - behaviour factor determination
KW - energy-dissipative steel brace
KW - high-post-yield stiffness braced steel frame
KW - replaceable energy-dissipative pins
KW - residual drift reduction
KW - seismic-resistant braced steel frame
UR - http://www.scopus.com/inward/record.url?scp=85147022561&partnerID=8YFLogxK
U2 - 10.1002/eqe.3828
DO - 10.1002/eqe.3828
M3 - Article
AN - SCOPUS:85147022561
SN - 0098-8847
VL - 52
SP - 1536
EP - 1556
JO - Earthquake Engineering and Structural Dynamics
JF - Earthquake Engineering and Structural Dynamics
IS - 5
ER -