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CAREER: Auxetic Lattice Reinforcing Metamaterial Architectures for a New Class of Concrete Metastructures

职业：用于新型混凝土超结构的拉胀晶格增强超材料架构

基本信息

批准号：
2044705
负责人：
Symeon Gerasimidis
金额：
$ 54.79万
依托单位：
University of Massachusetts Amherst
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-02-01 至 2026-01-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2044705&HistoricalAwards=false
关键词：
CAREER Auxetic Lattice Reinforcing Metamaterial

项目摘要

This Faculty Early Career Development (CAREER) program will exploit unique mechanical properties of architected metamaterials to create a new class of reinforced concrete structures (i.e., metastructures) with mechanical properties (i.e., strength, ductility and energy absorption) superior to those available today. Reinforced concrete is among the most commonly used structural materials in the world and therefore significant improvements in its properties have transformative societal implications such as reducing costs, as well as increasing the quality and capabilities of structures. Reinforced concrete metastructures, either designed directly from or influenced by architected metamaterials, combine material and architecture in unique ways to achieve previously unattainable properties. The education and outreach plan of this program will enhance the scientific literacy of underserved bilingual students at all levels by developing educational strategies with effective scientific content. It will engage elementary students through the “Engineering is Elementary” program of the Boston Museum of Science and will also facilitate transfer of knowledge to the industry by linking educational activities to industrial work.The research relies on a novel concrete confinement technique which can be achieved through a unique mechanical property found in architected metamaterials. The research approach is to employ auxetic (negative Poisson’s ratio) metamaterial lattice architectures as reinforcement and demonstrate the utility of this new auxetically confined concrete for improving the performance of members within a building structural system. Through material synthesis of the concrete matrix and the auxetic lattice, a new composite will be created and a new auxetic confinement model will be developed in the inelastic range. To achieve this, an integrated computational and experimental research program will be pursued. Finally, to upscale the auxetically confined concrete for building structures, the research program will employ digital fabrication and automated manufacturing techniques to efficiently manufacture auxetically confined concrete structural members. Columns and shear wall coupling beams will be designed and experimentally tested to demonstrate the capabilities of the new auxetically confined reinforced concrete, aiming at improved strength and ductility as well as increased shear strength and energy absorption.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这一学院早期职业发展(CALEAR)计划将利用建筑超材料的独特机械性能来创造一种新的钢筋混凝土结构(即超结构)，其机械性能(即，强度、延展性和能量吸收)优于当今可用的机械性能。钢筋混凝土是世界上最常用的结构材料之一，因此，其性能的显著改善具有革命性的社会影响，如降低成本，以及提高结构的质量和能力。钢筋混凝土超结构，无论是直接由超材料设计，还是受到超材料的影响，都以独特的方式将材料和建筑结合在一起，实现了以前无法达到的性能。该方案的教育和推广计划将通过制定具有有效科学内容的教育战略，提高各级双语学生的科学素养。它将通过波士顿科学博物馆的“工程是基础”项目吸引小学生参与，还将通过将教育活动与工业工作联系起来，促进知识向该行业的转移。研究依赖于一种新的混凝土限制技术，这种技术可以通过在建筑超材料中发现的独特机械性能实现。研究方法是使用伸展(负泊松比)超材料格子结构作为配筋，并展示这种新型的辅助约束混凝土在改善建筑结构体系中构件的性能方面的效用。通过混凝土基质和伸展晶格的材料合成，将产生一种新的复合材料，并在非弹性范围内发展一种新的伸展约束模型。为了实现这一目标，将开展一项综合计算和实验研究计划。最后，为了提升用于建筑结构的辅助约束混凝土，该研究计划将使用数字制造和自动化制造技术来高效地制造辅助约束混凝土结构构件。柱和剪力墙连梁将被设计和实验测试，以展示新的辅助约束钢筋混凝土的能力，旨在改善强度和延性，以及增加剪切强度和能量吸收。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。