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框架填充墻結構基于性能的抗震評估

Performance-based seismic evaluation of masonry-infilled frames

  • 摘要: 在現有研究基礎上,經統計分析提出了框架與填充墻各自的性能水平劃分及其層間位移角限值.建立了框架填充墻非線性有限元模型.對6、9和12層三個典型框架填充墻結構進行小震、中震和大震下的靜力彈塑性分析,得出框架填充墻結構在不同水平地震作用下層間位移角分布.依據抗震性能指標,分析和評估了填充墻框架結構的抗震性能,指出目前規范的不足.根據計算結果,給出了用于評估結構性能的圖表.

     

    Abstract: The performance levels of frame structures and masonry-infilled walls together with corresponding inter-story drift limits were proposed by statistical analysis based on the current research results. A nonlinear finite element model was established for masonry-infilled frames. Nonlinear static analysis was performed for 6-,9-,and 12-story masonry-infilled frame structures under frequent, moderate and rare earthquakes and the inter-story drifts were obtained. According to the performance index, the seismic performances of masonry-infilled frames were evaluated and the inadequacy of the Chinese seismic code was pointed out. Based on the calculated results, a table for performance evaluation of masonry infilled frames is given for reference in practical use.

     

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