High-Performance Composite Infrastructural Systems UtilizingAdvanced Cementitious Composites

到目前为止，在高性能材料领域取得了重大进展，而在先进基础设施系统的发展方面做得相对较少。本研究项目的目标是通过选择性地使用高性能材料，开发创新的、部分现浇的高性能复合框架系统（hpcfs），包括：(1)连续纤维垫高性能纤维增强混凝土（HPFRCs），称为浆料浸润混凝土（SIMCON）；(2)不连续纤维HPFRCs，称为浆料浸润纤维混凝土（SIFCON）；(3)高强度-轻骨料纤维增强混凝土（HS-LWA FRC）。该研究将集中于高性能复合材料(A)柱构件、(B)梁构件和(C)梁柱子组件的开发，包括实验和分析组件。将研究(a)服务载荷和(b)服务载荷与横向施加的反向循环载荷相结合的行为。通过将钢构件（例如轻钢形状和/或钢管）包裹在hfrcs中，开发新颖的原地模板元素，可以创建部分现浇HPCFS。留在原地的模板也将作为表面加固，从而取代传统的钢筋。构件的“核心”将使用HS-LWA FRC进行浇筑。这些发展预计将导致：(1)更简单、更快速、更经济的施工；(2)改善结构性能；(3)减小元件尺寸和重量，从而减少恒载、地震诱发载荷和增加可用面积；(4)提高结构的耐久性。本项目是国家科学基金“复合材料和混合结构”研究计划第二年资助的项目，NSF 94-154。

Until the present, major progress has been made in the field of high-performance materials, while comparatively little has been done in the development of advanced infrastructural systems. The goal of this research project is to develop innovative, partially-cast-in-place High-Performance Composite Frame Systems (HPCFSs) by selectively using high-performance materials, including: (1) continuous fiber-mat High Performance Fiber Reinforced Concretes (HPFRCs) called Slurry Infiltrated Mat Concrete (SIMCON), (2) discontinuous fiber HPFRCs called slurry Infiltrated Fiber Concrete (SIFCON), and (3) High Strength - Lightweight Aggregate Fiber Reinforced Concrete (HS-LWA FRC). The research will focus on the development of high-performance composite (A) column members, (B) beam members, and (C) beam-column sub-assemblages consisting of both experimental and analytical components. Behavior under (a) service loads and (b) service loads combined with laterally applied reversed-cyclic loading will be investigated. Partially cast-in-place HPCFS will be created by developing novel, stay-in-place formwork elements made by encasing steel members (e.g., light steel shapes and/or steel tubes) into HPFRCs. The stay-in-place formwork will also act as surface reinforcement, thus replacing conventional reinforcing bars. The `core` of the member will be cast-in-place using HS-LWA FRC. These developments are expected to lead to: (1) simpler, faster and more cost-effective construction, (2) improved structural performance, (3) reduction in element size and weight leading to the reduction in dead load, earthquake induced loading and an increase in usable floor space, and (4) improved durability of the structure. This is a project supported under the second-year program of research initiative on `Composite and Hybrid Structures`, NSF 94-154.