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首页> 外文期刊>Bulletin of earthquake engineering >Seismic retrofit of masonry wall infilled RC frames through external post-tensioning
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Seismic retrofit of masonry wall infilled RC frames through external post-tensioning

机译：通过外部张紧砌块覆盖RC框架的砖墙抗震改造

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In this study, an external post-tensioning technique was employed to enhance the seismic performance of infilled RC frames through preventing premature failure of infill walls and increase in their engagement with RC frames. Totally, six 1/3-scale single-story single-bay RC frames were constructed and tested. The frames were divided into two groups based on their aspect ratios. Each group consisted of a bare frame, an infilled frame and a retrofitted infilled frame. All specimens were subjected to a similar quasi-static cyclic loading and their responses were measured through load cells, strain gauges and linear variable differential transformers. Results indicated that the retrofitted infilled frames had higher initial stiffness, ultimate lateral strength and ductility ratio when compared with the bare and un-retrofitted infilled frames. The retrofitted infilled frames also showed a prolonged failure mode and a lower stiffness degradation rate compared to other frames. It was also observed that, compared to other frames, the retrofitted frames had smaller strain values at their critical zones.
机译：在这项研究中，采用外部张紧技术来增强填充RC框架的抗震性能，通过防止填充壁的过早失效，并与RC帧的接合增加。完全，建造和测试了六个1/3级单故事单架RC帧。基于其纵向比分为两组帧。每组由裸露的框架组成，一个夹具框架和改装的infilled框架。所有标本都经过类似的准静态环状载荷，通过称重传感器，应变仪和线性可变差压变压器测量它们的反应。结果表明，与裸露和未改装的缺陷框架相比，改造的缺陷框架具有更高的初始刚度，最终横向强度和延展性比。与其他帧相比，改装的infilled框架还显示出长时间的故障模式和较低的刚度降解速率。还观察到，与其他框架相比，改造的帧具有较小的应变值在其临界区。

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