Seismic retrofit II / Seismic diagnosis / Earthquake damage

[2172] RAPID SEISMIC EVALUATION METHOD OF EXISTING RC BUILDINGS WITH MASONRY INFILL BASED ON EARTHQAUKE DAMAGE

Md Shafiul ISLAM¹, Hamood ALWASHALI¹, Yuta TORIHATA², Masaki MAEDA² (1.Tohoku University 2.東北大学)

Keywords:Existing RC building, Masonry infill, Modified Shiga Map, Seismic Capacity Index

In developing countries, there are enormous stocks of vulnerable masonry infilled RC buildings, which are required to be identified for retrofitting and/or strengthening. This study presents a simple screening procedure, based on the concept of Shiga Map, which considers the cross-sectional areas of RC columns and masonry infills, and their shear strengths as well as corresponding seismic demand. This procedure is further improved by incorporating the effects of secondary factors such as plan irregularities and presence of soft story, which have influences on the seismic behavior.