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首页> 外文期刊>Bulletin of earthquake engineering >Investigation on improving the shear behavior of columns in masonry infilled RC frames under lateral loads
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Investigation on improving the shear behavior of columns in masonry infilled RC frames under lateral loads

机译：在横向载荷下改善砌体潜入式RC框架柱剪切行为的调查

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摘要

Presence of infills in reinforced concrete (RC) frames enhances the lateral load behavior of the bare frame system, but makes the columns vulnerable to shear failure under strong ground motions. This local adverse effect of infill is more pronounced in exterior ground storey columns where strong and stiff infills are present on one-side of the columns. Some of the current seismic standards address the local adverse effect of infill using variety of recommendations but their application is limited. Therefore, it is of primary importance to develop methods to counteract the adverse effect of infill. To prevent or delay the shear failure of columns, three methods (increasing the dimensions of the columns taking care of the effect of infill, using weak and soft masonry to reduce the effect of infill on columns, and decreasing the frame-interaction using collector beams in infills) were adopted in the present experimental study. From the results, it was observed that the methods not only enhanced the lateral load behavior, but also delayed the shear failure of columns without compromising the other functional requirements. The three methods can be efficiently used in both existing and new constructions to reduce the seismic vulnerability of masonry infilled RC frame buildings.
机译：钢筋混凝土（RC）框架中的填充物的存在增强了裸露框架系统的横向载荷行为，但是使柱易受强大的地面运动下的剪切失效。这种局部不利影响在外部地层柱上更加明显，其中柱的一侧存在强烈和僵硬的填充物。一些目前的地震标准解决了利用各种建议的潜入局部不利影响，但其申请有限。因此，开发方法以抵消填充的不利影响是初步的重要性。防止或延迟柱的剪切失效，三种方法（增加柱的尺寸照顾填充的效果，使用弱和软砌体，以减少填充柱的效果，并使用收集器束降低框架相互作用在本实验研究中采用Infills。从结果中，观察到该方法不仅提高了横向载荷行为，而且还延迟了柱的剪切失效而不会影响其他功能要求。这三种方法可以在现有的和新的结构中有效地使用，以减少砌体潜入的RC框架建筑物的地震脆弱性。

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