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

9710276 该研究项目的目的是获得有关钢筋混凝土 (SRC) 结构元件弯曲行为的更多知识。 目前缺乏对地震剪切行为的理解来支持复合材料或混合结构的合理设计。 具体来说，将解决与地震剪力设计相关的以下问题。 我。 SRC 元件中的抗剪机制 ii． 设计中考虑的剪切强度随着位移延性的增加而衰减；和 iii.高强度或高性能材料的 SRC 元件的抗剪强度 所开展的研究计划将侧重于高强度复合钢和混凝土 (HS-SRC) 结构元件的循环剪切行为的实验和分析研究。 研究的实验和分析阶段都将针对高强度 SRC 元件的基本行为及其在抗弯矩框架结构中的应用进行。 重点是评估不同的抗剪机制和延展性的影响，以及模型的校准和开发，以最好地评估各种抗剪机制的贡献。 这项研究的结果将用于制定可接受的抗震设计指南。 该研究不仅将增强我们对HSC结构的理解，还将带来实用可靠的SRC结构设计以及使用高强度材料的HSC系统的开发。 这是 NSF 第 94-154 号倡议“复合和混合结构”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". ***