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

基本信息

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

项目摘要

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，使用无粘结后张拉力可以改善预制梁柱接头组件的抗震性能。与当前的行业实践相比，在抗震结构体系中使用无粘结后张法是一项重大创新。对具有水平连接的无粘结后张预制混凝土墙的抗震性能进行了分析研究。然而，目前还没有验证壁分析模型所需的实验证据。该项目旨在通过实验评估多层无粘结后张预制混凝土墙的侧向荷载性能。该研究有两个具体目标：（1）验证为预测地震荷载下弯曲墙行为而开发的墙分析模型； (2) 验证这些墙水平连接的抗剪能力。将在八堵墙的半比例模型上进行循环和单调横向载荷测试。将使用基于非线性动态分析的两个横向载荷曲线。第一横向载荷分布产生大的基础力矩与基础剪切比。将在此荷载曲线下测试五堵墙。第二横向载荷曲线产生较小的基础力矩与基础剪力比。将在此荷载曲线下测试三堵墙。实验结果将与预测的行为进行比较，以确定预测弯曲和剪切滑移行为的模型和方法需要进行的改进。