Title Seismic Performance Evaluation of Perforated Masonry Wall Strengthened with Spring-Damped Steel-Bar Truss System
Authors 권희용(Kwon, Hee-Yong) ; 황승현(Hwang, Seung-Hyun) ; 양근혁(Yang, Keun-Hyeok) ; 김상희(Kim, Sanghee) ; 문형주(Moon Hyung-Joo)
DOI https://doi.org/10.5659/JAIK.2023.39.6.193
Page pp.193-201
ISSN 2733-6247
Keywords Unreinforced masonry wall; Door opening; Steel bar truss system; Spring damper
Abstract This experimental study evaluated the seismic performance of a perforated masonry wall strengthened with a spring-damped steel-bar truss system. In the spring-damped steel-bar truss system, the spring dampers as variables were made with two types of steel: SS275 and SAE9254. An unreinforced masonry wall with a door-sized opening was strengthened with the un-bonded damping steel-bar truss system, and its performance was compared with unreinforced masonry walls and strengthened masonry walls by steel-bar truss system without a spring damper. Compared with the seismic performance of the unreinforced masonry wall, the energy dissipation, equivalent damping ratio, and m-factor of masonry walls reinforced with a spring-damped steel-bar truss system are approximately 2.18 times, 1.38 times, and 1.17 times, respectively, for the SS275 spring damper and approximately 2.35 times, 1.27 times, and 1.20 times, respectively, for the SAE 9254 spring damper. It is considered that the spring-damped steel-bar truss system significantly improved the seismic performance of the masonry wall. However, there is little difference in the reinforcement effect based on the steel type.