This paper provides a detailed case study evaluating the seismic capacity of two representative non-seismic low-rise lightweight steel structures in Korea, specifically located on site class S3. The first structural model was developed based on standard design documentation, while the second incorporated structural attributes identified via a comprehensive survey of actual building construction practices. The seismic performance of both models was assessed using linear analysis and nonlinear static analysis methodologies. For each analytical approach, the effective peak ground acceleration (EPGA) of the demand response spectrum was progressively increased until the analytical model reached the limit state as defined by the relevant procedure. The critical factor influencing seismic capacity in both cases was the welded beam-to-column connection at the column tops. Results demonstrated that the seismic capacities required to prevent collapse ranged from 1.3 to 1.4 g under linear analysis, but reduced significantly to between 0.55 and 0.94 g under nonlinear static analysis. This discrepancy is primarily attributable to uncertainties associated with the response modification coefficient in the linear analysis, as well as the explicit consideration of post-yield behavior and deformation capacities of welded connections in the nonlinear assessment.

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1. 서 론
2. 국내 경량철골조 건축물 현황 조사
    2.1 건축물대장 표제부 기반 통계
    2.2 시공사례 조사
    2.3 구조적 특성
3. 대상 건축물
4. 선형해석 모델링
    4.1 공통 모델링 조건
    4.2 표준설계모델
    4.3 표본건물모델
5. 비선형해석 모델링
6. 내진능력평가 방법
    6.1 선형해석평가
    6.2 비선형해석평가
7. 내진능력평가 결과
    7.1 표준설계모델 내진능력
    7.2 표본건물모델 내진능력
    7.3 평가결과 비교 및 분석
8. 결 론
/ 감사의 글 /
/ REFERENCES /

• 박지훈(인천대학교 도시건축학부 교수) | Park Ji-Hun (Professor, Division of Architecture and Urban Design, Incheon National University) Corresponding author
• 김태은(인천대학교 일반대학원 건축학과 석사과정) | Kim Tae Eun (Graduate Student, Department of Architectural Design and Engineering, Graduate School, Incheon National University)