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Evaluation of seismic residual capacity ratio for reinforced concrete structures

Resilient Cities and Structures 2023年第1期2卷 28-45页

作者： Alex V.Shegay Kota Miura Kisho Fujita Yu Tabata Masaki Maeda matsutaro seki Tokyo Institute of Technology 4259 NagatsutaMidori-kuYokohamaJapan Obayashi Technical Research Institute 4-640 ShimokiyotoKiyoseJapan Obayashi Corporation 2-15-2 KonanMinato-ku TokyoJapan Kume Sekkei Co.Ltd 2-1-2 ShiomiKoto-ku TokyoJapan Tohoku University 12206-6-11 Aramaki AobaAoba-kuSendaiJapan Building Research Institute Tsukuba-shiTachihara 1Japan

Use of indices that quantify the seismic residual capacity of buildings damaged in earthquakes is one way to draw judgements on the building’s safety and possibility of future *** Japanese damage assessment guidelines,several approximate calculation methods exist to evaluate the residual capacity of buildings based on visually observed damage and simplifying assumptions on the nature of the building’s response mechanism and member *** these methods provide a useful residual capacity ratio that enables a‘relative’comparison be-tween buildings,the exact relationship to a physically meaningful residual capacity is *** aim of this study is to benchmark the‘approximations’of residual *** do so,a shake-table test was conducted on a 14 scale 4-storey RC structure and a residual capacity evaluation was undertaken based on observed damage *** the help of a numerical model,a benchmark residual capacity at each of the damage states is determined and compared to the approximate residual capacity calculation results via *** was found that approx-imate methods are generally accurate prior to yield but can become overly conservative *** assumptions of equal member deformation capacity used in the residual capacity ratio calculation was found to be suitable given constraints of rapid field evaluations.

关键词： Seismic residual capacity ratio Reinforced concrete Earthquake engineering Shake-table test Damage evaluation Numerical modeling

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