Collaborative Research: Dynamic Disproportionate Collapse in Flat-Plate Buildings

合作研究：平板建筑的动态不成比例倒塌

• 批准号: 1100146
• 负责人: Sarah Orton
• 金额: $ 18万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100146&HistoricalAwards=false
• 关键词: Collaborative; Research; Dynamic; Disproportionate; Collapse

The goal of this collaborative research is to provide much needed experimental data and effective modeling approaches for the disproportionate collapse analysis of older reinforced concrete flat-plate buildings that are commonly used for large residential and office complexes. Experimental and analytical studies will be conducted to examine the performance of such flat-plate structures under the scenario of a sudden loss of a column during an extreme loading event. The experiments will be performed on laterally restrained slab-column connections under static and dynamic loading and multi-panel specimens subjected to sudden load release. The tests will be conducted to provide data to define key parameters needed for analytical modeling, to identify the local strength and deformation capacity of the flat-plate systems, and to study the post-punching behavior of slab-column connections. Finite element simulations will be employed to facilitate the design of experiments, to determine local deformation demands, to define failure propagation characteristics, and to examine the effects of other design parameters not considered in the experiments. Simplified analytical tools will also be developed for quick evaluation of the progressive collapse resilience of flat-plate buildings without conducting a detailed finite element analysis. The research in this project will lead to improved design guidelines for safer flat-plate buildings under extreme loading events. The data obtained from this study will also help in the development of appropriate rehabilitation approaches for flat-plate structures that are vulnerable to disproportionate collapse. Research findings will be disseminated to the structural engineering community through publications, presentations, and websites created for this project. High school students and undergraduate students will be engaged in this project to enhance their research interests in engineering. Research results will be integrated into the graduate level courses related to slab structures, and the project will provide advanced training to graduate student through their involvement in the project research activities.

这项协作研究的目的是提供急需的实验数据和有效的建模方法，用于对通常用于大型住宅和办公大楼的旧钢筋混凝土平板建筑物的不成比例崩溃分析。将进行实验和分析研究，以检查在极端载荷事件中突然丢失柱的情况下这种平板结构的性能。这些实验将在静态和动态载荷以及受到突然载荷释放的多面板标本下对侧面约束的平板柱连接进行。将进行测试以提供数据以定义分析建模所需的关键参数，以确定平板系统的局部强度和变形能力，并研究平板柱连接的弹力后行为。将采用有限元模拟来促进实验的设计，确定局部变形需求，定义故障传播特性，并检查实验中未考虑的其他设计参数的效果。还将开发简化的分析工具，以快速评估平板建筑物的进行性崩溃弹性，而无需进行详细的有限元分析。该项目的研究将导致在极端装载事件下改进更安全的平板建筑物的设计准则。从这项研究中获得的数据还将有助于开发适当的康复方法，用于容易崩溃的扁平板结构。研究发现将通过为该项目创建的出版物，演示文稿和网站传播到结构工程社区。高中生和本科生将参与该项目，以增强他们在工程方面的研究兴趣。研究结果将集成到与平板结构有关的研究生级课程中，该项目将通过参与项目研究活动为研究生提供高级培训。