Reinforced concrete (RC) shear wall buildings with unreinforced masonry (URM) infilled moment frames are common in India and neighboring countries. This study assesses the influence of the URM infills on their seismic performance. Fully infilled, open first-storied, and bare frame versions of a 25-story shear wall building are considered. Multiple stripe analysis is conducted at five return periods to estimate their performance. Fragility functions for the collapse prevention limit state, which is based on seven engineering demand parameter exceedance thresholds, are generated and compared. The presence of infills (full or partial) is observed to have an overall positive effect on the performance of the RC frame-shear wall buildings. The performance of the open first-story building was comparable to that of the fully infilled building. The ratio of story shear carried by the moment frames and shear walls is studied at all return periods to understand the variation in frame shear wall interaction with increased damage for each building. In the case of buildings with infills, the frames carry a higher proportion of story shear at lower return periods. For all three buildings, the fraction of story shear carried by moment frames increases along the height of the building.

中文翻译：

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无筋砌体填充对钢筋混凝土框架剪力墙建筑抗震性能的影响

采用无筋砌体 (URM) 填充弯矩框架的钢筋混凝土 (RC) 剪力墙建筑在印度及其邻国很常见。本研究评估了 URM 填充物对其抗震性能的影响。考虑采用全填充、开放式首层和裸框架版本的 25 层剪力墙建筑。在五个回报期进行多条带分析以估计其性能。生成并比较了基于七个工程需求参数超出阈值的防倒塌极限状态的脆弱性函数。据观察，填充物（全部或部分）的存在对 RC 框架剪力墙建筑的性能产生总体积极影响。开放式首层建筑的性能与完全填充的建筑相当。在所有返回周期研究弯矩框架和剪力墙承载的层剪力比，以了解框架剪力墙相互作用与每栋建筑物损坏增加的变化。对于具有填充物的建筑物，框架在较低的回报期下承受较高比例的层剪力。对于所有三座建筑物，力矩框架​​承载的楼层剪力部分沿着建筑物的高度增加。