Experimental Analysis of Seismic Performance of Masonry Shear Wall Reinforced with PP-Band Mesh and Plastering Mortar under In-Plane Cyclic Loading
Experimental Analysis of Seismic Performance of Masonry Shear Wall Reinforced with PP-Band Mesh and Plastering Mortar under In-Plane Cyclic Loading
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DOI：
10.1155/2020/4015790
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发表时间：
2020-04
影响因子：
1.8
通讯作者：
Qiang Zhou;Lingyu Yang;Wenyang Zhao
中科院分区：
文献类型：
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作者：
Qiang Zhou;Lingyu Yang;Wenyang Zhao
砖混结构由于造价低、施工简单，在发展中国家得到了广泛的应用，特别是在偏远地区，那里有大量没有抗震措施的房屋。即使在小地震的作用下，这些建筑也容易倒塌，造成大量人员伤亡。对于这种结构的加固，迫切需要一种廉价、有效、易于施工的加固方法。因此，本文对聚丙烯带(PP带)的加固方法进行了研究。对两种PP带配筋砌块墙体和两种对比墙体进行了低周反复荷载试验。主要研究了PP带和抹灰砂浆不同抗压强度对墙体抗震性能的影响。本文主要研究的抗震指标包括极限承载力、耗能能力、刚度退化和滞回特性。试验结果表明，PP带能显著提高墙体的抗震能力。PP带加固墙体的极限承载力、耗能能力和位移延性分别提高了38%~48%、22%~47%和138%~226%。
Masonry structures are widely used in developing countries due to their low cost and simple construction, especially in remote areas, where there are a large number of houses without seismic measures. These buildings are prone to collapse and cause a lot of casualties, even under the action of small earthquakes. For the reinforcement of this structure, a cheap, effective, and easy-to-construct reinforcement method is urgently needed. Therefore, this article studies the reinforcement method of polypropylene bands (PP-bands). We have carried out low-frequency cyclic loading tests for two PP-band reinforced masonry walls and two compared masonry walls. We mainly studied the influence of PP-band and different compressive strengths of plastering mortar on the masonry wall’s seismic capacity. The seismic indicators mainly studied in this article include ultimate bearing capacity, energy dissipation capacity, stiffness degradation, and hysteresis characteristics. The experimental results show that the PP-band can greatly enhance the seismic capacity of the masonry wall. The ultimate bearing capacity, energy dissipation capacity, and displacement ductility of the PP-band reinforced wall are increased by 38%–48%, 22%–47%, and 138%–226%.