耐震補強した鉄筋コンクリート造中高層集合住宅の耐震性能評価に関する検討

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In case of seismic retrofit R/C mid-to-high-rise apartment house, it is usually necessary to retrofit not only the ground floor but also the habitable floors. In this report, several seismic retrofit plans being able to execute under living are planned to an existing one and there retrofit effectiveness are discussed by the seismic diagnosis method, static elasto-plastic analysis and earthquake response analysis. As a result, the following items are made clear. That is, 1. The total length of retrofit frames necessary for the retrofit by typical steel braces or damping braces amount to 0.5〜1.0m per 100m^2 of the total sum of floor areas. 2. The almost similar result of evaluation to each other retrofit plans can be obtained by the seismic diagnosis, elasto-plastic analysis, and earthquake response analysis. 3. In case of the retrofit with objective structural seismic index Is(Seismic Index of Structure)=0.6, it is possible to restrain the maximum story drift angle of the building within 1/100rad. to the earthquake with velocity of 50kine. 4. Maximum response displacements of the retrofitted buildings by the ductile braces or damping braces are 90% or 50% of the response displacement of the original building, respectively. 5. The very high axial force acts on the surrounding columns at the bottom floor of multi-story retrofit frame. Therefore the structural performance of the retrofit joint becomes important.
一般社団法人日本建築学会の論文
2001-03-20

耐震補強した鉄筋コンクリート造中高層集合住宅の耐震性能評価に関する検討

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