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."

非延性平板建筑物是 容易受到严重损害， 可能会崩溃， 中等强度的地震。 中东部地区 美国有一个很大的 这些建筑物的库存。 渐进式崩溃会导致 从冲压失败到 连接. 该项目的主要目标 是发展最小化的改造 限制全球 应对和确保结构 中度接地时的完整性 议案 为了实现这一点， 合适分析工具 预测非- 延性平板建筑 地震荷载将是 首先开发。 一个最近 展开三参数 滞后模型将是 并入 非线性动力分析 程序分析比较 各种翻新策略。 以检验为目的的实验 连接处的改造方案 防护水平 连续倒塌和控制 负荷的重新分配也将 执行。 特别是 使用填充墙的概念， 提高抗横向载荷能力 将被详细研究。 实验性和 分析研究，该项目是 预计将提供一个综合的 优化改造策略， 在保护和 连接级别和受控 全球响应。 该项目得到了 NSF研究计划No.92 -28 有关“修葺及修复工程 混凝土结构抗震性能研究 结构. "