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Title |
Effect of Finishing Mortar on Seismic Performance of Unreinforced Masonry Walls
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Authors |
백지성(Ji-Sung Baik) ; 양근혁(Keun-Hyeok Yang) ; 황용하(Seung-Hyeon Hwang) ; 김상희(Sanghee Kim) ; 김윤용(Yun-Yong Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2022.34.2.121 |
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Keywords |
조적벽; 조적 프리즘; 마감 모르타르; 고인성 섬유보강 시멘트 복합체; 강체회전 내력 masonry walls; masonry prism; finishing mortars; engineered cementitious composites; rocking strength |
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Abstract |
The present study examined the effect of finishing mortars on the mechanical properties of masonry prisms and the in-plane seismic performance of unreinforced masonry (URM) walls. Specimens were classified into three cases as follows: non- finishing mortars; conventional cement mortars; and engineered cementitious composites (ECC) for finishing the surface of masonry. Test results showed that masonry prisms finished using cement mortars and ECC exhibited 1.3 and 1.8 times higher values of compressive strength and diagonal tensile strength, respectively than those measured for unfinished prisms. The rocking strength of URM walls finished using cement mortars and ECC was 1.5 times and 2.3 times, respectively, higher than that of the unfinished URM wall. Meanwhile, the effect of finishing mortars on the energy dissipation capacity of URM walls was marginal until rocking displacement occurred. The proposed model based on the concrete elasticity theorem for the rocking strength of URM walls is in relatively better agreement with test results than is the FEMA 306 equation.
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