In-plane behavior of seismically damaged masonry walls repaired with external BFRP
In-plane behavior of seismically damaged masonry walls repaired with external BFRP
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DOI：
10.1016/j.compstruct.2013.01.031
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发表时间：
2013-08
影响因子：
6.3
通讯作者：
Deyuan Zhou;Z. Lei;Jibing Wang
中科院分区：
文献类型：
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作者：
Deyuan Zhou;Z. Lei;Jibing Wang
本文研究了玄武岩纤维增强聚合物（BFRP）加固前后8个无筋砌体（URM）墙体的面内抗震性能。8个试件中，1个作为参考试件，不做任何加固方案；3个在施工后直接用BFRP加固；4个试件经循环试验达到预定损伤水平后，采用BFRP进行修复。为改造后的URM墙体设计了混合强化结构。所有这些墙都在相同的加载策略下进行了破坏测试。在实验室试验中考虑了不同的参数，包括层数、带材宽度和垂直压缩水平。试验研究表明，参考试件与加固墙体的破坏模式不同。测试结果在横向强度、极限漂移、刚度退化、能量耗散和FRP应变方面进行了讨论。最后，提出了一种考虑FRP加固砌体墙体强度的改进设计模型。
This paper investigates the in-plane seismic behavior of eight unreinforced masonry (URM) walls before and after being retrofitted by basalt fiber reinforced polymer (BFRP). Among these eight specimens, one served as the reference specimen, without any strengthening scheme; three were directly strengthened with BFRP after construction; four were cyclically tested to the pre-defined damage level, and then repaired with BFRP. The mixed strengthening configuration was designed for the retrofitted URM walls. All these walls were tested to failure under a same loading strategy. Different parameters, including layer number, strip width, and vertical compression level, were considered in the laboratory tests. The experimental study shows that the failure modes between the reference specimen and retrofitted walls are different. Testing results are discussed in terms of lateral strength, ultimate drift, stiffness degradation, energy dissipation, and FRP strain. Finally, an improved design model is proposed for strength consideration of FRP retrofitted masonry walls.