A Novel Building Material for Panelized Construction

用于镶板建筑的新型建筑材料

• 批准号: 0229631
• 负责人: Nasim Uddin
• 金额: $ 15万
• 依托单位: University of Alabama at Birmingham
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0229631&HistoricalAwards=false
• 关键词: Novel; Building; Material; Panelized; Construction

FRP/AC sandwich panel with a core of lightweight high performance Aerated Concrete (AC) (e.g., Autoclave Aerated Concrete, Cellular Concrete etc.) and face sheets of Fiber Reinforced Plastics (FRP) composites has the potential to be an excellent energy absorbing construction material plus it is relatively inexpensive and available over much of the globe. Consistent with the recent interests in high performance, zero maintenance civil infrastructures, the proposed project will investigate the potential of FRP/AC sandwich panels (that are cost effective, long lived, and lightweight), and concepts will be developed and feasibility demonstrated for construction of low cost building structures using the panel. FRP/AAC sandwich components will also be durable in severe environments including corrosion and against ballistic impact. The results of the program has the potential to provide commercial and residential building that is more energy efficient and cheaper than traditional construction. It also has some properties, in addition to those mentioned above, that may be of interest to the military and others responsible for protecting lives. The unique contribution of the effort will be the application of cost-effective VARTM (Vacuum Assisted Resin Infusion Molding process) processing using innovative FRP hardening schemes with recently developed glass-and carbon fiber architectures and vinyl ester as well as epoxy resin types. The proposed effort will also eliminate traditional hand lay-up processing techniques which prove to be expensive and time-wise inefficient, and simultaneously advanced the state of the art of usage of advanced composites in civil infrastructure.This project, a first step towards the long-term goal, will address five fundamental queries: 1) Investigate cost-effective manufacturing of FRP/AC sandwich panels with damage tolerant architectures and new resin systems. 2) Perform material characterization and structural testing of FRP/AC sandwich panels through a comprehensive experimental program. The experimental studies are expected to provide an understanding of the (a) failure mechanisms of the proposed sandwich panels, (b) the strength, energy absorption, strain and modulus characteristics, (c) the role of the fiber-to-AC concrete interface, and (d) failure of the composite layers in the sandwich structure. 3) Develop concept and demonstrate the ballistic response of affordably produced sandwich panels that have promise to harden/strengthen without adding weigh penalty, and are cost-effective. 4) Understand the structural response of such structures through analytical simulations. 5) Develop modular systems to show how the FRP/AC panels can be used for a variety of types of building construction. Erection, assembly, and connections will be provided to clearly show how the construction can handle the material in the field. The proposed effort will explore the tangible benefits for wider application in structural engineering application areas. Finally, it was demonstrated in our previous study that the impact response of two proven materials- i.e., carbon fiber reinforced composite (CFRC) and glass fiber reinforced composite (GFRC), in conjunction with engineered Polycarbonate (PC) thermoplastic exhibits desirable failure mechanisms through indention of the Polycarbonate accompanied by delaminating at Polycarbonate-laminate interface rendering minimal damage to the laminate. The dynamic tests included ballistic impact loading conditions using a 30-cal sabot assisted projectile and high strain rate loading using compression Split Hopkinson Pressure Bar (SHPB). The rationale was that by providing a PC facing, the damage resistance of the composite structure could be enhanced, as the PC can absorb energy, with minimal weight penalty, and can serve the purpose of a sacrificial layer, that is easily repairable or replaceable. Two graduate students and three undergraduate students will be involved in the project. They will be exposed to a wide range of technological issues crossing the boundaries of different engineering disciplines such as materials science, structural design, computer simulations, infrastructure analysis, hazard mitigation, and a variety of fabrication techniques at the University of Alabama (Birmingham) campus. The REUs will also organize demonstration for the high school students at the university high school on the UAB campus. The PI has had prior rewarding experiences working with REUs from diverse groups.

以轻质高性能加气混凝土 (AC)（例如蒸压加气混凝土、多孔混凝土等）为核心和纤维增强塑料 (FRP) 复合材料面板的 FRP/AC 夹芯板有潜力成为一种优异的吸能建筑材料，而且价格相对便宜，可在全球大部分地区使用。与最近对高性能、零维护民用基础设施的兴趣一致，拟议项目将研究 FRP/AC 夹芯板（具有成本效益、寿命长且重量轻）的潜力，并将开发使用该夹芯板建造低成本建筑结构的概念并论证其可行性。 FRP/AAC 夹层部件在腐蚀和弹道冲击等恶劣环境下也很耐用。该计划的结果有可能提供比传统建筑更节能、更便宜的商业和住宅建筑。除了上述特性外，它还具有一些军方和其他负责保护生命的人员可能感兴趣的特性。这项工作的独特贡献将是应用具有成本效益的VARTM（真空辅助树脂灌注成型工艺）加工，使用创新的FRP硬化方案以及最近开发的玻璃和碳纤维结构以及乙烯基酯和环氧树脂类型。拟议的工作还将消除传统的手糊加工技术，这些技术被证明是昂贵且时间效率低下的，同时推进了先进复合材料在民用基础设施中的使用技术水平。该项目是实现长期目标的第一步，将解决五个基本问题：1）研究具有耐损伤结构和新树脂系统的 FRP/AC 夹芯板的成本效益制造。 2) 通过综合实验计划对 FRP/AC 夹芯板进行材料表征和结构测试。实验研究预计将有助于了解（a）所提出的夹芯板的失效机制，（b）强度、能量吸收、应变和模量特性，（c）纤维与AC混凝土界面的作用，以及（d）夹芯结构中复合层的失效。 3) 开发概念并展示经济实惠的夹芯板的弹道响应，这些夹芯板有望在不增加重量损失的情况下硬化/强化，并且具有成本效益。 4）通过分析模拟了解此类结构的结构响应。 5) 开发模块化系统，展示 FRP/AC 板如何用于各种类型的建筑结构。将提供安装、组装和连接，以清楚地展示施工如何在现场处理材料。拟议的工作将探索在结构工程应用领域更广泛应用的切实好处。最后，我们之前的研究表明，两种经过验证的材料（即碳纤维增强复合材料 (CFRC) 和玻璃纤维增​​强复合材料 (GFRC)）与工程聚碳酸酯 (PC) 热塑性塑料相结合，通过聚碳酸酯的压痕以及聚碳酸酯-层压界面处的分层，呈现出理想的失效机制，从而将损坏降至最低。 到层压板。动态测试包括使用 30 口径弹托辅助弹丸的弹道冲击载荷条件和使用压缩分离霍普金森压力棒 (SHPB) 的高应变率载荷。其基本原理是，通过提供 PC 饰面，可以增强复合结构的抗损伤能力，因为 PC 可以吸收能量，重量损失最小，并且可以起到牺牲层的作用，易于修复或更换。两名研究生和三名本科生将参与该项目。他们将接触到跨越不同工程学科界限的广泛技术问题，例如材料科学、结构设计、计算机模拟、基础设施分析、危害缓解以及阿拉巴马大学（伯明翰）校园的各种制造技术。 REU 还将在 UAB 校园的大学高中为高中生组织示威活动。该 PI 之前曾与来自不同群体的 REU 合作过，颇有收获。