CAREER: Development of High-Performance Lignocellulosic Composites for Building Envelopes: Authentic Learning About Sustainable Materials Through Research-Based Inductive Approach

这个教师早期职业发展（CAREER）项目将开发一个系统的分析解决方案，以准确设计，建造和评估建筑围护结构组件的瓦楞芯木质纤维素夹芯板，作为净零能耗建筑的潜在解决方案。建筑围护结构的组成部分会影响其结构和湿热性能，并决定建筑物的运行能耗;减少建筑物运行能耗的替代设计和材料将满足我们国家的市场准备，净零建筑的目标。基于复合材料板理论的模型将在设计木质纤维素夹芯板时考虑波纹芯的双向波动。该模型将定义设计复杂的夹层板芯的成形极限。项目还将评估全尺寸夹层板的结构和湿热性能的住宅墙应用。这个职业生涯项目的长期教育目标是培养新一代的工程师，他们认识到木质纤维素纤维的可持续建筑材料，并具备设计和制造用于净零能源建筑中建筑围护结构的生物基复合材料产品的知识。美国40%的一次能源消耗在建筑领域，其中住宅占百分之五十四，商业楼宇占百分之四十六。住宅建筑占美国温室气体（GHG）排放总量的17%（以二氧化碳当量计），其中空间供暖和制冷占GHG排放量的37%。美国联邦政府的目标是到2015年实现市场就绪的净零能源商业建筑，到2030年实现住宅建筑。该研究建议通过新的设计概念推进可持续建筑的科学，使用住宅建筑的镶板系统，以满足建筑规范的结构和能源要求。多功能、轻质、3-D木质纤维素板的性能将上级目前用作建筑围护结构组件的材料，并允许创新的板式建筑，这将减少我们未来住宅的运行能源消耗，并刺激住宅建筑行业。考虑到对绿色建筑材料的需求增加（预计未来五年每年增长13%），补充商品基础设施的增值产品将有助于振兴森林产品工业的各个部门。

This Faculty Early Career Development (CAREER) project will develop a systematic analytical solution to accurately design, build, and evaluate corrugated-core lignocellulosic sandwich panels for building envelope components as a potential solution for net zero energy construction. Components of a building envelope influence its structural and hygrothermal performance and determine a buildings consumption of operational energy; alternative designs and materials that reduce a building's operational energy will meet our nation's goal of market-ready, net-zero buildings. Model based on composite plate theory will account for bidirectional undulations of a corrugated-core in designing a lignocellulosic sandwich panel. The model will define the forming limits for designing the complex core of a sandwich panel. Project will also evaluate fullsize sandwich panel structural and hygrothermal performance for residential wall applications. The long-term educational goal of this CAREER project is to prepare new generation of engineers cognizant of sustainable building materials from lignocellulosic fibers and equipped with the knowledge to design and manufacture bio-based composite products for building envelopes in a net zero energy construction.Forty percent of US primary energy was consumed in the buildings sector, of which homes accounted for 54 percent and commercial buildings accounted for 46 percent. Residential buildings contribute 17 percent to the total US greenhouse gas (GHG) emissions measured in carbon dioxide equivalents, of which space heating and cooling account for 37 percent of GHG emissions. The US federal government has a goal of market-ready, net-zero energy commercial buildings by the year 2015 and residential buildings by 2030. The study proposes to advance the science of sustainable buildings through new design concepts using panelized systems for residential construction to meet structural and energy requirements of the building codes. Performance of multi-functional, lightweight, 3-D lignocellulosic panels will be superior to currently used materials as building envelope components and allow innovative panelized construction which will reduce the consumption of operational energy of our future homes and stimulate the home building industry. Considering an increased demand for green building materials (13 percent annual growth predicted in next five years), value-added products that complement commodity-based infrastructure will contribute to revitalizing segments of the forest products industry.