SGER: Progressive Collapse Investigation of an Existing Steel Frame Building

SGER：现有钢框架建筑的渐进式倒塌调查

• 批准号: 0745140
• 负责人: Halil Sezen
• 金额: --
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0745140&HistoricalAwards=false
• 关键词: SGER; Progressive; Collapse; Investigation; Existing

The main research objectives of this Small Grant for Exploratory Research (SGER) project are to: 1) review and evaluate the current progressive collapse design criteria and guidelines, 2) model and analyze an existing steel frame building following the current code provisions, and 3) conduct an experiment by removing three or four first-story columns and investigate the subsequent collapse or damage progress in the building. The availability of actual buildings that can be tested to collapse is very limited, so it is imperative that this opportunity be taken. A four-story steel frame building located on the Ohio State University campus will be modeled and analyzed to investigate its vulnerability against progressive collapse. As recommended by the current design guidelines and code standards, one corner column and several first-story perimeter columns will be cut and removed, and the ensuing structural response will be compared with that predicted from the computer simulation. Many researchers have conducted analytical studies to evaluate the effectiveness and consistency of the current progressive collapse design guidelines. However, very limited experimental research was performed to validate the results of those analytical studies and to verify the methodologies prescribed in the guidelines. This is mainly because it is usually difficult to construct and test full-scale building specimens and such large-scale testing is discouragingly expensive. As part of the experimental research, it will be possible to test a real four-story building scheduled for demolition. The test data will enable investigation of validity and effectiveness of the current guidelines and provide actual collapse behavior that can be used to validate collapse simulation.The research will have significant impact, specifically on the new design and repair and strengthening of collapse-resistant building structures. In addition to providing much needed information on the experimental behavior of a real building after the removal certain load carrying elements or columns, the research results could be used to predict the collapse resistance of similar steel buildings with regular floor plans. The results from this experimental and analytical research program are likely to impact the current practice and guidelines developed for progressive collapse evaluation and design of buildings. The observed collapse failure mode from the test building will provide an indication of level of conservativeness of the current guidelines. Test results will be compared with the predicted response from simulations as part of the analytical investigation. Since there is very limited or no experimental collapse data from real buildings, the outcome of the research will have broad impacts on the structural engineering community, including researchers and practitioners. The validity of the current simplified analysis procedures will be verified using the test results. This will also provide an exceptional experience for undergraduate and graduate students who will be involved in the experiments.

这项针对探索性研究（SGER）项目的小型赠款的主要研究目标是：1）审查和评估当前的渐进式崩溃设计标准和指南，2）模型并分析了当前代码规定后的现有钢架建筑物，以及3）进行实验，通过删除三个或四个第一层的柱子，并研究该建筑物中后来的崩溃或破坏造成的崩溃或破坏。 可以测试可以崩溃的实际建筑物的可用性非常有限，因此必须抓住这一机会。将对位于俄亥俄州立大学校园的四层钢制框架建筑进行建模和分析，以调查其针对进行性崩溃的脆弱性。按照当前的设计指南和代码标准的建议，将切割和删除一个角列和几个第一层外围列，随后的结构响应将与计算机模拟预测的结构响应进行比较。 许多研究人员已经进行了分析研究，以评估当前进行性崩溃设计指南的有效性和一致性。但是，进行了非常有限的实验研究以验证这些分析研究的结果并验证指南中规定的方法。这主要是因为通常很难构造和测试全尺寸建筑标本，而且这种大规模测试令人沮丧地昂贵。作为实验研究的一部分，可以测试计划拆除的真正四层楼高建筑物。测试数据将使当前准则的有效性和有效性调查，并提供可用于验证崩溃模拟的实际崩溃行为。研究将产生重大影响，特别是对新的设计和修复以及增强抗崩溃的建筑结构的影响。除了在拆卸某些承载元素或柱子后，还提供有关真实建筑物的实验行为的急需信息之外，该研究结果还可以用来预测具有常规平面图的类似钢制建筑物的倒塌性。 该实验和分析研究计划的结果可能会影响目前的实践和为建筑物的进行性崩溃评估和设计而开发的准则。测试建筑物的观察到的崩溃失败模式将提供当前准则的保守性水平。作为分析研究的一部分，将将测试结果与模拟的预测响应进行比较。由于来自真实建筑物的实验崩溃数据非常有限或没有实验性崩溃，因此研究的结果将对包括研究人员和从业人员在内的结构工程社区产生广泛的影响。当前简化分析程序的有效性将使用测试结果验证。 这还将为参与实验的本科生和研究生提供非凡的经验。