Simulation of Collapse Behavior and Field Testing of Masonry Buildings

砌体建筑倒塌行为模拟及现场试验

• 批准号: 1435446
• 负责人: Halil Sezen
• 金额: $ 22.76万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2018-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1435446&HistoricalAwards=false
• 关键词: Simulation; Collapse; Behavior; Field; Testing

While masonry materials are inherently strong under gravity loads, loadbearing masonry walls can easily fail under lateral earthquake, wind or impact loads, causing collapse of the building. Accurate evaluation of collapse potential and improvement of collapse resistance of loadbearing masonry buildings are critical research needs to increase the resilience of nation's infrastructure against man-made and natural hazards. The major objective of this project is to generate experimental evidence by physically testing and recording existing multi-story masonry buildings during their scheduled demolition. The project aims to answer the question: How are the gravity loads on a loadbearing masonry wall redistributed within a multi-story building if one or more walls are suddenly removed? The answers to this question will improve understanding of collapse risk of masonry buildings.The mechanics of collapse and redistribution of loads within a loadbearing masonry building has not been well understood because of lack of experimental data and the difficulty in analyzing this complex structural system. During the demolition of existing masonry buildings on the campus a novel stereo visual data collection system will be used to capture the dynamic collapse process. In addition, other sensors will record deformation and redistribution of loads during controlled removal of walls. This project will provide much needed experimental data on full-scale buildings to validate the results of computational models, such as the axial spring models, reported in the literature. The numerical research, along with the measured experimental response, will characterize the dynamic collapse mechanism of masonry buildings due to sudden loss of one or more walls. The unique experimental data will be archived for future use by other researchers.

尽管砌体材料在重力负载下固有地很强，但在横向地震，风或撞击负荷下，承重的砌体壁很容易失败，从而导致建筑物的崩溃。准确评估崩溃的潜力和改善负载砌体建筑的抗崩溃性是重要的研究，以提高国家基础设施对人造和自然危害的弹性。该项目的主要目的是通过在预定的拆除期间对现有的多层砌体建筑进行物理测试和记录来生成实验证据。该项目的目的是回答以下问题：如果突然拆除一个或多个墙壁，重新分配了多层建筑物内重新分布的重力砌体墙上的重力如何？这个问题的答案将提高人们对砌体建筑物的崩溃风险的理解。由于缺乏实验性数据和分析这种复杂的结构系统的困难，尚未充分理解锻造砌体建筑物中负载的崩溃和重新分布的机制。 在拆除校园现有的砌体建筑物时，将使用新颖的立体视觉数据收集系统来捕获动态崩溃过程。此外，其他传感器将记录在受控墙壁时的变形和重新分布。该项目将提供有关全面建筑物的急需的实验数据，以验证文献中报道的计算模型的结果，例如轴向弹簧模型。数值研究以及测得的实验响应将表征由于一个或多个壁突然损失而导致的砌体建筑物的动态塌陷机制。独特的实验数据将存档，以供其他研究人员使用。