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

9710276本研究项目的目的是获得更多的知识，弯曲性能的钢筋混凝土（SRC）结构元件。 目前对组合或混合结构的抗震剪切性能缺乏了解，无法支持其合理设计。 具体而言，将解决以下与抗震剪切设计相关的问题。 I. SRC构件的抗剪机理 二. 抗剪强度随位移的增大而衰减 设计中考虑的延性;以及 三.高强或高抗剪型钢混凝土构件的抗剪强度 performance materials 本研究计画将着重于高强度钢与混凝土组合结构构件之循环剪力行为之实验与分析研究。 试验和分析阶段的研究将进行高强度SRC元件的基本性能与抗弯矩框架结构的应用。 重点是不同的抗剪机制的评估和延性的影响，以及校准和模型的发展，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开发 可接受的抗震设计准则。 本文的研究不仅有助于提高对高强混凝土结构的认识，而且有助于指导型钢混凝土结构的实用可靠设计，以及开发使用高强度材料的高强混凝土结构体系。 这是NSF第94-154号倡议“复合材料和混合结构”支持的一个项目。 ***

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". ***