Development of Macro-Modeling Method for In- and Out-of- Plane Failure of URM Infill Wall

研究的重点是模拟无筋砌体（URM）填料的面外行为。对孟加拉国达卡市一座典型的六层建筑进行了预期地震动分析。我们设计并建造了全尺寸的砖URM填充RC框架样本，它代表了假设的原型建筑顶层的框架。通过对建筑物进行动力分析，推导出所选框架在面外方向上所受的激励。该激励将作为参考激励，对试件施加面外振动。对两个URM填充RC框架试件进行了面内试验。第一个试样的面内漂移测试为1.00%，第二个试样的面内漂移测试为0.40%。将第一试样移至振动台上，并搭建了面外振动试验的测量系统。一种预测URM填充试件面外行为的数值模型正在开发中。利用数值模型对试件在振动试验中的性能进行了预测。根据数值模型的初步分析结果，对面外振动进行了规划。在完成动态测试后，根据行为观察测试结果，我们将与我们的数值模型预测结果进行比较。如果结果之间存在差异，则识别差异背后的原因，并对数值模型进行相应的修改和校准。

The focus of the research is to simulate the out-of-plane behavior of unreinforced masonry (URM) infills. A typical 6-story building in Bangladesh is analyzed under expected ground motion in Dhaka city. We have designed and constructed full scale brick URM infilled RC frame specimens which represents a frame on the top story of the assumed prototype building. By conducting dynamic analysis of the building, the excitation that will be suffered by the selected frame in the out-of-plane direction is derived. This excitation will be used as the reference excitation to apply out-of-plane shaking to the specimens.In-plane testing of the two URM infilled RC frame specimens has been conducted. The first specimen is tested up to 1.00% in-plane drift and 0.40% in-plane drift is applied to the second specimen. The first specimen is moved to the shaking table and the measurement system for the out-of-plane shaking test has been setup. A numerical model to predict the out-of-plane behavior of the URM infill specimens is under development. Using the numerical model we are predicting the behavior of the specimens during the shaking test. Based on the preliminary analysis results using the numerical model we are planning the out-of-plane shaking. After finishing the dynamic testing, based on the behavior observation test results, we will compare with out numerical model prediction. If there are differences between the results, the reasons behind the differences will be identified and the numerical model will be modified and calibrated accordingly.