| 논문명 |
지반운동 지속시간이 철골 특수중심가새골조 건물의 구조적 붕괴위험성에 미치는 영향 / Effect of Earthquake Ground Motion Duration on the Structural Collapse Risk of Steel Special Concentrically Braced Frame Buildings |
| 저자명 |
황성훈(Hwang, Seong-Hoon) ; 임유진(Yim, Yu Jin) |
| 수록사항 |
한국지진공학회 논문집, Vol.29 No.2(통권 164호) (2025-03) |
| 주제어 |
; Ground motion duration; Collapse risk; Concentrically braced frame; Structural model; Nonlinear structural analysis |
| 요약2 |
While the subduction zone earthquakes have long ground motion durations, the effects are also not covered in seismic design provisions.
Additionally, the collapse risk of steel frame buildings subjected to long-duration ground motions from subduction earthquakes remains poorly understood. This paper presents the influence of ground motion duration on the collapse risk of steel frame buildings with special concentrically braced frames in chevron configurations. The steel buildings considered in this paper are designed at a site in Seattle, Washington, according to the requirements of modern seismic design provisions in the United States. For this purpose, the nonlinear dynamic analyses employ two sets of spectrally equivalent long and short-duration ground motions. Based on the use of high-fidelity structural models accounting for both geometric and material nonlinearities, the estimated collapse capacity for the modern code-compliant steel frame buildings is, on average, approximately 1.47 times the smaller value when considering long-duration ground motion record, compared to the short-duration counterpart. Due to the sensitivity to destabilizing P-Delta effects of gravity loads, the influence of ground motion duration on collapse risk is more profound for medium-to-high-rise steel frame buildings compared to the low-rise counterparts. |
