Establishment of a Numerical Analysis Model for RC Shear Walls with Openings Based on Pseudo-Dynamic Experiments

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K15140
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: Akita Prefectural University
• Principal Investigator: SAKURAI MASATO 秋田県立大学, システム科学技術学部, 助教 (60710184)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: RC造耐震壁 / 有開口耐震壁 / 復元力モデル / 擬似動的実験 / FEM解析

Outline of Final Research Achievements

The purpose of this study is to investigate the validity of the proposed backbone curve model for reinforced concrete (RC) shear walls with openings, whose seismic performance is considered to be difficult to understand, through experimental and analytical approaches. Parametric FEM analysis shows that the accuracy of the proposed model gradually decreases as the shear span ratio, which indicates the susceptibility to flexural yielding behavior, increases. In addition, Pseudo-dynamic tests were conducted to investigate the response of shear walls with openings during a seismic load with different positions and number of openings. As a result, it was found that the response characteristics of the walls differed depending on the opening conditions after the approximate maximum shear capacity, which is very useful data for the continuous verification of the proposed model.

Free Research Field

鉄筋コンクリート構造

Academic Significance and Societal Importance of the Research Achievements

構造性能の把握が困難とされているドアや窓などの開口を有する鉄筋コンクリート（RC）造耐震壁部材においてコンピュータ数値解析で適用可能な復元力特性モデルを確立することは，建築構造設計者の設計自由度の向上に寄与しうるものである。提案モデルを市販の構造解析ソフトウェアに採用される柱梁モデルと同等の実用レベルにまで再現精度の向上を図ることができれば，有開口耐震壁部材を含む建物の応答解析の予測精度向上，これまでかなり安全側に評価していた有開口耐震壁部材の耐力を有効活用することによる効率的設計と建築資材コスト低減の実現，新築設計のみならず既存建物の耐震性能評価にも適用可能と多くのメリットが期待できる。