High-Performance Partially-Cast-in-Place SMA-Prestressed Composite Infrastructural Systems

高性能部分现浇 SMA 预应力复合基础设施系统

• 批准号: 9632407
• 负责人: Neven Krstulovic-Opara
• 金额: $ 5万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 1999-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632407&HistoricalAwards=false
• 关键词: Performance; Partially; Cast; Place; SMA

*** 9632407 Krstulovic-Opara This goal of this study is to explore a novel concept of self-prestressing High-Performance Composite Infrastructural Systems created through the selective use of high- performance materials. The investigation will explore a distinctive new concept of using Shape Memory Alloys as muscular systems embedded in continuous fiber-mat High Performance Fiber Reinforced Concretes to develop an innovative, stay-in-place formwork capable of self-inducing prestressing, after the "core" of the element has been cast- in-place. The stay-in-place formwork will be used to: (1) self-induce multiaxial post-tensioning of the entire structural element, and (2) act as surface reinforcement, thus replacing conventional reinforcing bars. This way partially-cast-in-place self-prestressing will be developed. If successful, the proposed concept will lead to: (1) simpler, faster and more cost-effective construction, (2) markedly improved structural performance, (3) reduction in element size and weigh leading to the reduction in dead load, earthquake induced loadings and an increase in usable floor space, and (4) improved durability of the structure.***

*** Krstulovic-Opara本研究的目标是探索一种通过选择性使用高性能材料创建的自预应力高性能复合基础设施系统的新概念。该研究将探索一种独特的新概念，即使用形状记忆合金作为嵌入连续纤维垫的高性能纤维增强混凝土中的肌肉系统，开发一种创新的、能够自诱导预应力的原地模板，在元素的“核心”已经浇筑到位之后。留置模板将用于：(1)整个结构单元的自诱导多轴后张，(2)作为表面加固，从而取代传统的钢筋。这种方式将发展局部现浇自预应力。如果成功，提出的概念将导致：(1)更简单，更快，更具成本效益的施工，(2)显着改善结构性能，(3)减少单元尺寸和重量，从而减少恒载，地震诱发载荷和增加可用面积，以及(4)提高结构的耐久性