CAREER: Seismic Behavior and Design of Non-Emulative Precast Concrete Buildings with Supplemental Passive Energy Dissipation

研究计划的主要目的是研究在预制混凝土墙和框架建筑结构中使用补充被动耗能。预制混凝土结构在地震区最大的缺点是由于非弹性能量耗散小而导致侧向位移增加。现在可以通过使用补充的被动能量耗散来减少这些位移。本研究将对补充被动耗能在钢结构和整体现浇混凝土结构中的应用进行基础的、综合的分析和实验研究，并对这些系统进行评估。该项目最终将制定具有补充被动耗能的预制混凝土结构的抗震设计和分析指南和建议。教育计划的总体目标是通过使用万维网（WWW）开发动态、互动的“虚拟实验室”模块，为混凝土结构和地震工程的本科和研究生水平的教育提供更有效的环境。这些模块将使用万维网的最新进展（如Java applet）来开发，以演示有关混凝土截面、构件和结构的地震行为和设计的基本信息。这些模块将允许学生配置系统参数（如几何形状、钢筋、混凝土约束、材料特性、载荷等），并观察这些变化对行为的影响。这些功能将允许学生在网络上交互式地配置和进行他们自己的示例，“假设”研究和实验。建议的WWW模块将包括在线帮助以及有关主题的理论背景。这些模块将被PI教授的三门课程使用，并将通过互联网提供给世界各地的其他教育机构和执业工程师使用，并将与专业机构和行业协会合作进行，如波特兰水泥协会（PCA）和预制/预应力混凝土协会（PCI）。

The broad objective of the research program is to investigate the use of supplemental passive energy dissipation in precast concrete wall and frame building structures. The greatest disadvantage of precast concrete structures in seismic regions is an increase in lateral displacements as a result of small inelastic energy dissipation. It is now possible to reduce these displacements by using supplemental passive energy dissipation. This research will conduct a fundamental, integrated analytical and experimental investigation on the use of supplemental passive energy dissipation in steel and monolithic cast-in-place concrete structures and assessment of these systems.This project will ultimately develop seismic design and analysis guidelines and recommendations for precast concrete structures with supplemental passive energy dissipation. The broad objective of the education program is to provide a more effective environment for undergraduate and graduate level education in concrete structures and earthquake engineering by developing dynamic, interactive "virtual laboratory" modules using the World Wide Web (WWW). These modules will be developed using recent advancements in the WWW, such as Java applets, to demonstrate fundamental information on the seismic behavior and design of concrete sections, members, and structures. The modules will allow the students to configure the system parameters (such as geometry, reinforcement, concrete confinement, material properties, loading, etc.) and observe the effects of these changes on behavior. These capabilities will allow the students to interactively configure and conduct their own examples, " what if" studies, and experiments on the web. The proposed WWW modules will include on-line help as well as theoretical background on the subject matter.The modules will be used by three courses taught by the PI and will be available for use by other education institutions and practicing engineers throughout the world, through the internet, and will be conducted in collaboration with professional bodies and trade association such as the Portland Cement Association (PCA) and the Precast/Prestressed Concrete Institute (PCI).