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In this study, the seismic performance of a two-story unreinforced masonry (URM) building was assessed following the linear and nonlinear static procedures specified in the seismic evaluation guideline of existing buildings. First, the provisions to assess failure modes and shear strengths of URM walls and wall piers were reviewed. Then, a two-story URM building was assessed by the linear static procedure using m-factors. The results showed that the walls and wall piers with aspect ratios he /l (i.e., effective height-to-length ratio) > 1.5 were unsafe due to rocking or toe crushing, whereas the walls with he /l ≤1.5 and governed by bed-joint sliding mainly were safe. Axial stresses and shear forces acted upon individual masonry walls, and wall piers differed depending on whether the openings were modeled. The masonry building was reevaluated according to the nonlinear static procedure for a more refined assessment. Based on the linear and nonlinear assessment results, considerations of seismic evaluation for low-rise masonry buildings were given with a focus on the effects of openings.
1. 서 론
2. 조적벽체의 전단강도
2.1 파괴모드 및 전단강도
2.2 설계변수에 따른 전단강도
2.3 개구부의 영향
3. m계수를 이용한 선형평가
3.1 모델링 및 구조해석
3.2 선형평가 결과
3.3 선형평가에 대한 고려사항
4. 비선형정적평가
4.1 조적벽체의 비선형 모델링
4.2 푸시오버해석 및 성능판정
5. 결 론
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