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Effect of Anchor Bars on Seismic Behavior of Infilled Walled Frames
KSCE Journal of Civil Engineering ( IF 2.2 ) Pub Date : 2020-08-05 , DOI: 10.1007/s12205-020-1979-9
Atila Kumbasaroglu

User-defined plastic hinge properties obtained experimentally are used to examine the structural behavior of bare, infilled walled frames with and without anchor bars in reinforced concrete (RC) buildings. Experimentally obtained moment-curvature relationships of structural members (i.e., beams and columns) are used to determine the plastic hinge properties of each section. Three building frames are modeled and examined for time-history analysis using 20 ground-motion records. Seismic performance levels of three buildings are analyzed to determine the effects of anchor bars. Limit states at each performance level are defined, and the multi-record incremental dynamic analysis curves are obtained; 16%, 50%, and 84% fractal curves are obtained for each case. Cumulative distribution functions are constructed to summarize the varieties in the roof-drift ratios of three RC buildings with different frame types for design-based and maximum-considered earthquake hazards. It is found that, with an increased spectral acceleration of ground motions, the probability of exceeding the performance levels of infilled walled frames in reinforced buildings is reduced with the help of anchor bars. The increased stiffness of RC buildings with infilled wall frames exhibiting lower ductility is re-gained by the absorption energy of the anchor bars.



中文翻译:

锚杆对填充墙框架抗震性能的影响

通过实验获得的用户定义的塑料铰链特性可用于检查钢筋混凝土(RC)建筑中带有或不带有锚杆的裸墙,填充墙框架的结构性能。实验获得的结构构件(即梁和柱)的弯矩-曲率关系用于确定每个截面的塑料铰链特性。对三个建筑模型进行建模,并使用20条地面运动记录进行时间历史分析。分析了三座建筑物的抗震性能水平,以确定锚杆的影响。定义了每个性能级别的极限状态,并获得了多记录的增量动态分析曲线。每种情况下分别获得16%,50%和84%的分形曲线。构造了累积分布函数,总结了三种不同框架类型的RC建筑物的屋顶飘移率的变化,以用于基于设计和最大考虑的地震灾害。已经发现,随着地面运动频谱加速度的增加,借助于锚杆,降低了超过钢筋混凝土中填充墙框架性能水平的可能性。锚杆吸收能量可以重新获得具有较低延展性的填充墙框架的RC建筑物增加的刚度。借助锚杆,可以降低超过钢筋混凝土墙框架的性能水平的可能性。锚式墙架的吸收能量可以重新获得具有较低延展性的填充墙框架的RC建筑物增加的刚度。借助锚杆,可以降低超过钢筋混凝土墙框架的性能水平的可能性。锚杆吸收能量可以重新获得具有较低延展性的填充墙框架的RC建筑物增加的刚度。

更新日期:2020-08-05
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