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."

非延展的平板建筑物容易受到严重破坏，并可能在中等强度的地震期间塌陷。 美国的中部和东部地区有大量此类建筑物的清单。 渐进式崩溃可能是由于连接处的打突击失败而导致的。 该项目的主要目的是制定最低率返回策略，以限制全球响应并确保中等地面运动期间的结构完整性。 为此，将首先开发出一种合适的分析工具，用于预测地震负载下非凝血型扁平板建筑物的响应。 最近开发的三参数滞后模型将被纳入现有的non线性动态分析计划中，以分析和比较各种改装策略。 还将进行旨在测试连接水平改造方案的实验，以防止进行性崩溃和负载的控制重新分布。 特别是，将研究使用填充墙来提高侧向载荷电阻的概念。 借助实验和分析研究，该项目有望提供一种优化的集成改造策略，以在连接级别的保护与受控的全球响应之间保持平衡。 NSF研究计划第92-28号支持“修复和康复研究的结构地震抗性”。