Development of reinforced method of historic masonry buildings by steel in consideration for design and workability

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I carry out vibration survey and analysis of historic masonry buildings forward construction of reinforced methods in consideration for design and workability. Microtremor measurements conducted for masonry buildings before and after reinforcement used by steel frame and/or RC shear walls. So we understand the change of out-of-plane natural frequencies, vibration mode and damping factor. Under unreinforced walls, I conduct mode analysis and proposal of estimation formula of 1^<st> natural frequency based on thick plate theory.