High-Performance Composite Infrastructural Systems UtilizingAdvanced Cementitious Composites

到目前为止，在高性能材料领域已经取得了重大进展，而在先进基础设施系统的开发方面却相对较少。本研究项目的目标是通过有选择地使用高性能材料来开发创新的部分现浇高性能复合框架体系(HPCFSS)，包括：(1)称为浆液渗透垫混凝土(SIMCON)的连续纤维毡高性能纤维混凝土(HPFRC)，(2)称为浆液渗透纤维混凝土(SIFCON)的不连续纤维HPFRC，以及(3)高强-轻集料纤维混凝土(HS-LWA FRC)。这项研究将集中于开发高性能复合材料(A)柱构件，(B)梁构件，和(C)由试验和分析部件组成的梁柱部件。将研究在(A)服务荷载和(B)服务荷载与横向施加的反向循环荷载组合作用下的行为。部分现浇式HPCF将通过开发新型的、通过将钢构件(例如，轻型钢和/或钢管)包裹在HPFRC中而制成的留在原位的模板构件来创建。现浇模板还将起到表面加固的作用，从而取代传统的钢筋。该成员的“核心”将使用HS-LWA FRC就地浇注。预计这些发展将导致：(1)更简单、更快和更具成本效益的施工；(2)改善结构性能；(3)减少单元尺寸和重量，从而减少恒载、地震引起的荷载和增加可用楼面空间；以及(4)提高结构的耐久性。该项目是由NSF 94-154“复合材料和混合结构”研究计划的第二年计划资助的。

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.