Dynamic Response of Precast Concrete Frames (PRESSS)

9307666艾布拉姆斯该项目将调查现有分析模型的使用，以确定具有延性连接的预制混凝土框架系统的非线性动力响应。先前在PRESS程序中开发的计算模型将通过将三个缩尺结构的计算响应与测量响应相关联来验证。每个缩小比例的框架系统都将使用从全尺寸压力机实验中获得的框架连接细节来构建。试验结构将使用伊利诺伊州振动台进行一系列轻微、中度和强烈的模拟地震运动。缩尺框架连接的滞回关系将根据拟议的一系列补充静力试验的结果被表征为计算模型的输入。除了验证数值模型外，还将使用物理模型的动态响应来建议计算动态响应的简化分析程序。然后，这些简化程序的结果将与用更复杂的模型计算的反应相关联，以进行验证。此外，使用简化模型计算的反应将与实际预制框架建筑在地震作用下的实测动力反应相关联。一旦开发出来，简化的分析方法将被用来检查美国不同地震区不同场地特征的各种框架体系的体系响应。这项研究将是h)0*0*0*，目的是将大规模构件试验数据外推到全国框架结构体系的设计中。***

9307666 Abrams The project will investigate the use of existing analytical models for determining nonlinear dynamic response of precast concrete frame systems with ductile connections. Computational models developed previously within the PRESSS program will be verified by correlating computed response with measured response of three reduced scale structures. Each of the reduced scale frame systems will be constructed using frame connection details derived from full scale PRESSS experiments. Test structures will be subjected to an array of light, moderate and strong simulated earthquake motions using the Illinois shaking table. Hysteresis relations for reduced scale frame connections will be characterized for input to computational models based on results of a supplemental series of proposed static tests. In addition to verifying numerical models, dynamic response of the physical models will be used to suggest simplified analytical procedures for calculating dynamic response. Results of these simplified procedures will then be correlated with response computed with more complex models for verification. In addition, response computed using simplified models will be correlated with measured dynamic response of an actual precast frame building subjected to an earthquake. Once developed, the simplified analytical methods will be used to examine system response for various frame systems in different U.S. seismic zones with different site characteristics. This study will be h) 0*0*0* done with the purpose of extrapolating large scale component test data to design of frame structural systems across the nation. ***