Seismic Shear Strength and Design of High-Strength Composite Steel and Concrete Structural Elements

9710276这项研究项目的目的是对型钢混凝土结构构件的抗弯性能有更多的了解。目前，对于组合或混合结构的合理设计，缺乏对地震剪切行为的了解。具体地说，将解决以下与抗震剪切设计相关的问题。钢骨混凝土构件的抗剪机理2。抗剪强度随着设计中考虑的位移延性的增加而衰减；高强或高性能材料型钢混凝土构件的抗剪强度研究计划将集中于高强组合钢与混凝土(HS-SRC)结构构件的循环剪切性能的试验和分析研究。试验和分析阶段的研究都将是关于高强型钢混凝土构件的基本性能及其在抗弯框架结构中的应用。重点是评估不同的抗剪机制和延性的影响，以及校准和开发模型，以最好地评估各种抗剪机制的贡献。这项研究的结果将被用于制定可接受的抗震设计指南。本文的研究不仅将加深我们对高强混凝土结构的认识，而且将为高强混凝土结构的实用可靠设计和高强混凝土体系的发展提供理论指导。这是一个由美国国家科学基金会第94-154号倡议“复合材料和混合结构”支持的项目。***

9710276 The objective of this research project is to gain additional knowledge on flexural behavior of steel-reinforced-concrete (SRC) structural elements. There is currently a lack of understanding of seismic shear behavior to support the rational design for composite or hybrid structures. Specifically, the following issues related to seismic shear design will be addressed. i. Shear resisting mechanisms in SRC elements ii. Shear strength decay upon the increase of displacement ductility as considered in design; and iii. Shear strength of SRC elements of high-strength or high performance materials The research program undertaken will focus on experimental and analytical investigations of the cyclic shear behavior of high- strength composite steel and concrete (HS-SRC) structural elements. Both the experimental and analytical phases of the research will be conducted on fundamental behavior of high strength SRC elements with applications to moment-resisting frame structures. The emphasis is on the evaluation of different shear resisting mechanisms and the influence of ductility, as well as calibration and development of models to best assess contributions of various shear resisting mechanisms. Results from this research will be used to develop acceptable seismic design guidelines. The research will not only enhance our understanding of HSC structures, but also lead to practical and reliable design of SRC structures and well as development of HSC systems using high strength materials. This is a project supported under NSF initiative No. 94-154 "Composite and Hybrid Structures". ***