Retrofit Strategies for Non-Ductile Reinforced Concrete Flat-Slab Buildings

非延性钢筋混凝土平板建筑的改造策略

• 批准号: 9221522
• 负责人: Ahmad Durrani
• 金额: $ 10万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-15 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9221522&HistoricalAwards=false
• 关键词: Retrofit; Strategies; Non; Ductile; Reinforced

Non-ductile flat-slab buildings are susceptible to severe damage and possibly collapse during earthquakes of moderate intensity. The central and eastern regions of the United States have a large inventory of such buildings. Progressive collapse can result from punching failure at connections. The main objective of the project is to develop minimum-retrofit strategies to limit the global response and ensure structural integrity during moderate ground motion. To accomplish this, a suitable analysis tool for predicting the response of non- ductile flat-slab buildings under earthquake loading will be developed first. A recently developed three-parameter hysteretic model will be incorporated into an existingnonlinear dynamic analysis program to analyze and compare various retrofit strategies. Experiments aiming at testing retrofit schemes at the connection level for protection against progressive collapse and controlled redistribution of loads will also be carried out. In particular, the concept of using infill walls to improve the lateral load resistance will be studied in some detail. With both experimental and analytical studies, this project is expected to provide an integrated retrofit strategy optimized for a balance between protection at the connection level and a controlled global response. This project is supported under the NSF Research Initiative No. 92-28 on "Repair and Rehabilitation Research for Seismic Resistance of Structures."

非延性平板建筑在中等强度的地震中容易受到严重损坏，甚至可能倒塌。 美国中部和东部地区拥有大量此类建筑。 连接处的冲孔失效可能导致逐渐塌陷。 该项目的主要目标是制定最小改造策略，以限制全球响应并确保中度地面运动期间的结构完整性。 为了实现这一目标，首先将开发一种合适的分析工具来预测非延性平板建筑在地震荷载下的响应。 最近开发的三参数迟滞模型将被纳入现有的非线性动态分析程序中，以分析和比较各种改造策略。 还将进行旨在测试连接层改造方案的实验，以防止逐渐倒塌和受控荷载重新分配。 特别是，将详细研究使用填充墙提高抗侧向荷载能力的概念。 通过实验和分析研究，该项目预计将提供一种优化的综合改造策略，以实现连接级保护和受控全局响应之间的平衡。 该项目得到 NSF 研究计划第 92-28 号“结构抗震修复和修复研究”的支持。