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块(URM)填充物的平面外行为。对孟加拉国典型的6层建筑在达卡市预期地震动作用下进行了分析。我们已经设计和建造了足尺砖URM填充的RC框架试件，代表了假设原型建筑顶层的框架。通过对建筑物进行动力分析，得到了所选框架在平面外方向所受的激励。将此激励作为参考激励，对试件施加离面振动。对两个URM填充的RC框架试件进行了平面内试验。第一个试件的面内漂移为1.00%，第二个试件的面内漂移为0.40%。将第一个试件移到振动台上，建立了离面振动试验的测量系统。一个预测URM填充试件平面外行为的数值模型正在开发中。利用该数值模型，我们预测了试件在振动试验过程中的行为。根据数值模型的初步分析结果，对离面振动进行了规划。动态试验完成后，根据性态观测试验结果，与数值模型预测结果进行比较。如果结果之间存在差异，将确定差异背后的原因，并相应地修改和校准数值模型。

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.