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

* 9632407 Krstulovic-Opara本研究的目的是探索通过选择性使用高性能材料创建的自预应力高性能复合材料预应力结构系统的新概念。调查将探索一个独特的新概念，使用形状记忆合金作为肌肉系统嵌入连续纤维垫高性能纤维增强混凝土，以开发一种创新的，留在原地的模板，能够自诱导预应力，后的“核心”的元素已被铸造到位。原位模板将用于：（1）整个结构元件的自诱导多轴后张，以及（2）作为表面钢筋，从而取代传统的钢筋。这种方法将发展部分现浇自预应力。 如果成功，所提出的概念将导致：（1）更简单，更快，更具成本效益的建设，（2）显着提高结构性能，（3）减少单元尺寸和重量，从而减少恒载，地震引起的负载和增加可用的楼面空间，以及（4）提高结构的耐久性。

*** 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.***