PRESS Phase III Design Studies

9710735 Stanton本项目涉及震区预制混凝土结构体系的设计。三个相关的研究是由不同的小组进行的，涵盖了大型预制混凝土结构的设计、实验室测试和分析。该项目解决了设计问题，加州大学圣地亚哥分校正在进行大规模测试，利哈伊大学计划执行一个分析程序。完整测试程序的总体目标是：O为预制混凝土抗震框架系统提供设计建议，O证明预制混凝土框架系统可以提供适合最严重地震区域的抗震性能；O使用预制构件的完整超组合来研究迄今为止已测试的静态确定的豆-柱连接试件中未引起的行为特征。研究的任务包括测试结构的设计，测量和预测行为的有限比较以及最终设计建议的起草。测试程序将为工程师和代码编写者提供所需的最后步骤，使他们能够正式确定合适的设计规则，并允许这种形式的构建。这将带来显著的好处。最主要的是预制混凝土具有优异的抗震性能，并将制定适合纳入规范的设计规则。当人们发现传统形式的钢框架抗震性能不足时，设计师在选择框架系统时几乎没有什么选择。开发一种可行的替代方案有可能扩大设计方案的范围，提高性能，减少施工时间和成本。* * *

9710735 Stanton This project is concerned with the design of precast concrete structural systems for seismic regions. Three linked studies are by separate groups, covering the design, laboratory testing and analysis of a large scale precast concrete structure. This project addresses the design, the University of California at San Diego is conducting large-scale testing and Lehigh University plans to perform a program of analysis. The overall goals of the complete testing program are to: o provide design recommendations for precast concrete seismic framing systems, o demonstrate that seismic performance suitable for the most severe seismic regions can be provided by precast concrete framing systems, o use the complete superassemblage of precast elements to investigate features of behavior that are not induced in the statically determinate bean-column connection specimens that have been tested to date. The tasks in the study cover the design of the test structure, limited comparisons of measured and predicted behavior and drafting of the final design recommendations. The testing program will provide the final steps needed to equip engineers and code-writers with the information that they need to formalize suitable design rules and to permit this form of construction. Significant benefits will accrue. The primary ones are that excellent seismic performance will be demonstrated to be available from precast concrete and that design rules suitable for inclusion in a code will be developed. At a time when steel moment frames have, in their traditional form, been found wanting in seismic resistance, designers have few options in choosing a framing system. Development of a viable alternative has the potential for broadening the range of design alternatives, improving performance and reducing construction time and cost. ***