| 논문명 |
지반의 동적특성에 따른 다양한 형식의 철골구조물의 지진하중 평가 및 설계응답스펙트럼 개선안 / Seismic Load Evaluation and Design Spectrum Enhancement for Steel Structures Considering Soil Dynamics |
| 저자명 |
김동관(Kim, Dong-Kwan) ; 김동욱(Kim, Dong-Wook) |
| 수록사항 |
대한건축학회논문집, Vol.40 No.9 (2024-09) |
| 주제어 |
지진하중;설계응답스펙트럼;지반증폭계수;내진설계기준;지반응답해석;철골구조물 ; Seismic Load;Design Response Spectrum;Site Amplification Factors;Seismic Design Codes;Site Response Analysis;Steel Structures |
| 요약1 |
본 연구는 증폭된 지반 운동을 고려하여 철골 구조물의 지진 하중을 평가한다. 현재 국내 내진설계기준(KDS 17 10 00, 2024)은 지반의 동적 특성을 반영하고 있지 않기 때문에, 실제 처리된 스펙트럼과 지반에 의한 지진동의 증폭 경향에는 다소 차이가 있다. 본 연구는 세 가지 지반 조건에서의 지표 지반 운동을 도출하고, 다양한 철골 구조물에서의 지진 하중을 비교 분석한다. 제안된 스펙트럼은 현재의 스펙트럼보다 지진에 의한 응답을 더 정확하게 예측하며, 단주기 및 중간 주기 지반에 위치한 구조물의 설계 효율성을 향상시킨다. |
| 요약2 |
This study evaluates seismic loads on various steel structures, taking into account amplified ground motions due to different soil conditions.
Seismic design codes define ground motions that induce inertial forces during earthquakes through the design response acceleration spectrum.
The 1985 Mexico earthquake highlighted the significant impact of soft soil amplification on seismic loads, leading to severe damage in midand
high-rise buildings and prompting the introduction of site amplification factors. However, the current Korean seismic design code (KDS
17 10 00: 2024) classifies ground without considering dynamic characteristics, resulting in discrepancies between actual and design response
spectra. This research analyzes three soil conditions with different dynamic properties, conducting site response analyses to derive surface
ground motions. Twelve steel structures of varying shapes (R-shaped, L-shaped, T-shaped) and heights (4, 8, 12, 16 stories) were examined.
By comparing seismic loads from amplified ground motions with those from the design spectrum, the study suggests improvements to the
seismic design spectrum. The findings indicated that the proposed spectra (PS-1, PS-2, PS-3), which account for dynamic site characteristics,
more accurately predict structural responses than the current KDS-S4 spectrum. Seismic base shear varied by up to 55% depending on site
conditions. The proposed spectra enhance design efficiency for structures on short-period (Site-1) and intermediate-period (Site-2) sites. For
long-period sites (Site-3), the amplification between modes was less pronounced, underscoring the need for comprehensive ground response
analyses to ensure safe designs. The study highlights the importance of revising the design response spectrum to reflect diverse ground
conditions, improving structural safety and performance predictions. |
