Based on the nonlinear static analysis and the approximate seismic evaluation method adopted in “Guidelines for seismic performance evaluation for existing buildings, two methods to calculate strength demand for retrofitting individual structural walls in unreinforced masonry buildings are proposed.” The displacement coefficient method to determine displacement demand from nonlinear static analysis results is used for the inverse calculation of overall strength demand required to reduce the displacement demand to a target value meeting the performance objective of the unreinforced masonry building to retrofit. A preliminary seismic evaluation method to screen out vulnerable buildings, of which detailed evaluation is necessary, is utilized to calculate overall strength demand without structural analysis based on the difference between the seismic demand and capacity. A system modification factor is introduced to the preliminary seismic evaluation method to reduce the strength demand considering inelastic deformation. The overall strength demand is distributed to the structural walls to retrofit based on the wall stiffness, including the remaining walls or otherwise. Four detached residential houses are modeled and analyzed using the nonlinear static and preliminary evaluation procedures to examine the proposed method.

A B S T R A C T
1. 서 론
2. 전체 보강량
    2.1 비선형정적절차 기반 설계
    2.2 예비평가 기반 설계
3. 보강량 분배
    3.1 손상 벽체에 분배
    3.2 전체 벽체 대상 분배
4. 설계 예제
    4.1 대상 건축물과 성능목표
    4.2 수치해석 모델
    4.3 비선형정적절차 기반 설계
    4.4 예비평가 기반 설계
5. 결 론
REFERENCES

• 설윤정((주)씨지스플랜) | Seol Yun Jeong (CGS Plan)
• 박지훈(인천대학교 도시건축학부) | Park Ji-Hun (Division of Architecture and Urban Design, Incheon National University) Corresponding author
• 곽병훈(인천대학교 일반대학원 건축학과) | Kwak Byeong Hun (Department of Architecture, Incheon National University)
• 김대호((주)한울구조안전기술사사무소) | Kim Dae Ho (Hanwool)