Large-Scale Experimental Evaluation of the Lateral Load Response of Unbonded Post-Tensioned Precast Walls with Horizontal Connections

水平连接无粘结后张预制墙横向荷载响应的大型试验评估

• 批准号: 9612165
• 负责人: Stephen Pessiki
• 金额: $ 15.06万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-15 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612165&HistoricalAwards=false
• 关键词: Large; Scale; Experimental; Evaluation; Lateral

Recent experimental and analytical research has shown the benefits of using unbonded post-tensional to improve the seismic behavior of precast beam-to-column joint subassemblages. Compared with current industry practice, the use of unbonded post-tensional in a seismic structural system is a significant innovation. The seismic behavior of unbonded post-tensioned precast concrete walls with horizontal connections has been investigate analytically. However, the experimental evidence needed to verify the wall analytical model is not currently available. This project is to experimentally evaluate the lateral load behavior of multi-story unbonded post-tensioned precast concrete walls. The research has two specific objectives: (1) to verify the wall analytical model that has been developed to predict the flexural wall behavior under seismic loading; and (2) to qualify the shear capability of the horizontal connections of these walls. Cyclic and monotonic lateral load tests will be performed on half-scale models of eight walls. Two lateral load profiles, based on nonlinear dynamic analyses, will be used. The first lateral load profile produces a large base-moment-to-base shear ratio. Five walls will be tested under this load profile. The second lateral load profile produces a small base-moment-to-base-shear ratio. Three walls will be tested under this load profile. Experimental results will be compared with predicted behavior to identify improvements that need to be made in the models and methods for predicting flexural and shear slip behavior.

最近的实验和分析研究表明，使用未粘附的后敏化来改善预制束至列关节亚组件的地震行为的好处。 与当前的行业实践相比，在地震结构体系中使用未持有的后期后使用是一项重大创新。 在分析中研究了具有水平连接的无基张后的预制混凝土壁的地震行为。 但是，目前尚不可用来验证墙壁分析模型所需的实验证据。 该项目是为了实验评估多层无粘性后的预制混凝土壁的横向载荷行为。 该研究具有两个特定的目标：（1）验证已开发出来的壁分析模型，以预测地震载荷下的弯曲壁行为； （2）有资格这些墙的水平连接的剪切能力。 循环和单调的横向负载测试将在八个壁的半尺度模型上进行。 将使用基于非线性动态分析的两个侧向负载轮廓。 第一个侧向负载曲线产生较大的基矩与碱基剪切比。 将在此负载配置文件下测试五堵墙。 第二个侧向负载曲线产生的基矩与基准剪切​​比小。 将在此负载配置文件下测试三堵墙。 实验结果将与预测的行为进行比较，以确定在模型和方法中需要进行的改进，以预测弯曲和剪切滑移行为。