Seismic Design and Behavior of Composite RCS Frames

本研究的总体目标是开发和综合有关复合框架建筑的设计、建造和非弹性行为的信息，这将导致它们在美国，特别是在地震地区得到更广泛的接受和利用。尽管在高层建筑中有一些显著的应用，但由于缺乏全面的设计标准和施工方法，复合RCS框架结构的广泛使用受到阻碍。复合RCS框架在美国的广泛使用将需要开发不同于以前用于高层建筑的建筑方案。原型复合系统设计：将使用来自美国和日本的可用信息（连接测试数据和设计指南）设计几个原型建筑。本次演习的目标是开发使用预制和/或预制复合组件的创新设计，以方便施工，并为地震应用提供所需的韧性和难度。非弹性地震行为和反应：原型建筑设计的地震行为将被评估，并通过详细的非弹性静态和瞬态结构分析与传统的钢和钢筋混凝土系统进行比较。这些研究将包括建筑反应的参数化研究，以评估和改进地震反应修改因素、非弹性漂移和稳定性限制、延性要求等现有规范中的地震设计标准。复合框架和连接的设计标准：将对美国和日本的现有设计条款进行批判性审查，以查看可以根据与复合RCS框架和连接相关的最新研究数据进行改进的地方。这将包括开发一份最先进的报告，以总结日本RCS框架的广泛测试数据、设计标准和施工实践，其中大部分仅用日语编写，目前美国工程师和研究人员无法访问。

The overall objective of this research is to develop and synthesize information on the design, construction and inelastic behavior of composite frame buildings that will lead to their broader acceptance and utilization in the U.S., particularly in seismic regions. In spite of some notable applications for tall buildings, wider use of composite RCS frame construction is hindered by the lack of comprehensive design criteria and construction methodologies. Widespread use of composite RCS frames in the U.S. will require development of construction schemes that may differ from those previously used for high-rise construction. The research has three interrelated composites: Prototype Composite System Designs: Several prototype buildings will be designed using available information (connection test data and design guidelines) from the US and Japan. The goal of this exercise will be to develop innovative designs using precast and/or prefabricated composite subassemblies that facilitate construction and provide required toughness and difficulty for seismic applications. Inelastic Seismic Behavior and Response: The seismic behavior of the prototype building designs will be evaluated and compared to conventional steel and reinforced concrete systems through detailed inelastic static and transient structural analyses. These studies will include parametric studies of building response to assess and improve seismic design criteria in existing specifications for earthquake response modification factors, inelastic drift and stability limits, ductility demands, etc. Design Criteria for Composite Frames and Connections: A critical review of existing design provisions in the U.S. and Japan will be conducted to see where improvements can be made based on the latest research data related to composite RCS frames and connections. This will include development of a state-of-the art report to summarize extensive test data, design criteria, and construction practice for RCS frames in Japan, much of which is only written in Japanese and is currently inaccessible to U.S. engineers and researchers.