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

URM填充墙面内和面外破坏宏观建模方法的开发

• 批准号: 22KJ0682
• 负责人: Adnan S M Naheed
• 金额: $ 1.41万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2023
• 资助国家: 日本
• 起止时间: 2023-03-08 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22KJ0682/
• 关键词: URM wall; Out-of-plane behavior; Prior in-plane damage; Numerical model; URM infill

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.

研究的重点是模拟无筋砌体 (URM) 填充物的平面外行为。在达卡市的预期地面运动下对孟加拉国一栋典型的 6 层建筑进行了分析。我们设计并建造了全尺寸砖 URM 填充 RC 框架样本，它代表了假定原型建筑顶层的框架。通过对建筑物进行动力分析，得出所选框架在面外方向上将受到的激励。该激励将用作参考激励，对样本施加面外振动。已经对两个 URM 填充 RC 框架样本进行了面内测试。第一个样本测试了高达 1.00% 的面内漂移，第二个样本则应用了 0.40% 的面内漂移。第一个样本被移至振动台，平面外振动测试的测量系统已安装完毕。用于预测 URM 填充样本的平面外行为的数值模型正在开发中。使用数值模型，我们预测样本在振动测试期间的行为。根据使用数值模型的初步分析结果，我们正在规划平面外振动。完成动态测试后，根据行为观察测试结果，我们将与数值模型预测进行比较。如果结果之间存在差异，将找出差异背后的原因，并对数值模型进行相应的修改和校准。

项目成果

Simulation of the out-of-plane behavior of URM infilled RC frames under dynamic excitation

动态激励下 URM 填充 RC 框架的平面外行为仿真

• 发表时间: 2022
• 作者: Adnan S. M. Naheed;Matsukawa Kazuto;Haga Yuji;Islam Md Monzurul;Nakano Yoshiaki;ADNAN S M NAHEED
• 通讯作者: ADNAN S M NAHEED

A nonlinear macromodel for simulating the in-plane behavior of unreinforced masonry (URM) infilled frames

用于模拟无筋砖石 (URM) 填充框架的面内行为的非线性宏观模型

• DOI: 10.1007/s10518-022-01488-8
• 发表时间: 2022
• 期刊: Bulletin of Earthquake Engineering
• 影响因子: 4.6
• 作者: Adnan S. M. Naheed;Matsukawa Kazuto;Haga Yuji;Islam Md Monzurul;Nakano Yoshiaki
• 通讯作者: Nakano Yoshiaki