填充墙框架结构基于性能的抗震评估方法研究

Study on Performance-based Seismic Evaluation Method for Masonry-infilled Frame Structures

结合国内外对框架结构性能水平的划分标准,将填充墙框架结构的性能水平划分为基本完好、轻微破坏、中等破坏、严重破坏和接近倒塌五个阶段;提出填充墙框架结构各性能水平的失效判别参数和标准,在统计国内外大量试验数据的基础上,提出其不同性能水平对应的层间位移角限值。以等效压杆模型模拟填充墙,采用能力谱方法比较无墙和含墙型框架在地震作用下的响应,并将填充墙框架的实际层间位移与所提性能指标进行比较,结果表明结构在多遇及罕遇地震作用下均满足预定的性能目标。

Combined with performance grades of reinforced concrete structures at home and abroad, the seismic performance of masonry-infilled frame structures can be divided into five levels ： basically normal, slight damage, medium damage, severe damage and collapse prevention. The limit states of all seismic performance levels and their dominating parameters of masonry-infilled frame structures are put forward, and quantified performance index of this structure are obtained on the basis of statistical test data. The seismic responses of pure and masonry-infilled frame structures are compared by using capacity spectrum method and equivalent strut model, and the result indicates that the structure could meet predetermined performance objective under the minor and major earthquake levels by comparing the practical story drift and proposed performance index.