CAREER: Innovative Technology for Mass Timber and Hybrid Modular Buildings

该学院早期职业发展(CALEAR)奖将创造创新的建筑技术，使大量木材模块化建筑成为解决当今美国主要城市面临的许多问题的建筑解决方案。建筑、工程和建筑(AEC)行业正处于一场重大变革的风口浪尖，这场变革将改变建筑的制造、组装和设计方式，其催化剂是建筑信息模型(BIM)与自动化施工和制造的集成。这种颠覆将对结构工程师产生重大影响。随着建筑制造、组装和设计的简化，工程师将需要利用三个机会：(1)可施工性设计，(2)制造设计，以及(3)建筑整个生命周期的设计(考虑未来的修改、维护和轻松更换建筑的部分)。模块化建筑作为利用这三个机会的一种方法，可以解决目前几乎每个美国城市都存在的劳动力和住房短缺问题，还可以为灾后重建和额外的患者护理设施提供快速建设方法。这项研究将有助于俄勒冈州的经济状况，俄勒冈州在大规模木材生产、制造和研究方面投入了大量资金。这项研究将通过制定最佳做法加以补充，以便利用跨学科、协作的课堂环境，提高研究生水平上代表不足的少数群体和妇女的工程特性。该奖项将支持国家科学基金会(NSF)在国家减少地震灾害计划和国家减少风灾影响计划中的作用。这项研究的具体目标是开发一种新的框架，用于坚固和延展性的大量木材模块结构，可以应用于具有不同侧向力抵抗系统的建筑。通过这个框架，将研究模块互连的刚度与整体结构性能之间的关系。该项目的研究目标是：(1)量化在建筑框架受到重力和侧向力(地震和风)的联合作用时提供延性的互联的需求；(2)量化互联结构和设计对互联能力的影响，以满足大体积木材高层模块化建筑的强度和适用性性能标准；(3)量化大体积木材模块化建筑的延性和超强，探索传统抗震性能因素的适用性以及这些因素对原型建筑调整后的倒塌裕度比的影响；(4)探讨互联刚度对高层模块化木结构建筑在风作用下行为的影响；(5)探讨以团队为中心和跨学科的教育实践与工程认同感和知识保持的关系。将创建新的连接技术，并将通过严格的测试计划和基于复杂物理的原型建筑在重力和横向荷载(地震和风)联合作用下的数值模拟来研究其对整体建筑行为的贡献。这项研究是开发创新技术的关键第一步，该技术将改变建筑的设计、制造和组装方式。该项目将使首席调查员能够在大量木材和混合建筑领域建立跨学科的研究、教学和指导。这项研究将使用美国国家科学基金会支持的佛罗里达大学自然危害工程研究基础设施(NHERI)边界层风洞设施。实验数据集将存档在国家科学研究院数据仓库(https://www.DesignSafe-ci.org))并公开提供。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This Faculty Early Career Development (CAREER) award will create innovative building technology that will enable mass timber modular construction as a building solution to many of the issues the nation's major cities face today. The architecture, engineering, and construction (AEC) sector is on the cusp of a significant disruption that will change the way buildings are manufactured, assembled, and designed, the catalyst of which is the integration of building information models (BIM) and automated construction and manufacturing. This disruption will significantly impact structural engineers. With the streamlining of building manufacturing, assembling, and design, engineers will need to take advantage of three opportunities: (1) design for constructability, (2) design for manufacturing, and (3) design for the whole life of the building (considering future modifications, maintenance, and easily replacing parts of the building). Modular construction, as one method to take advantage of these three opportunities, can address labor and housing shortages that exist in almost every U.S. city today and also can provide rapid construction methods for post-disaster reconstruction and additional patient care facilities. This research will contribute to the state of Oregon’s economy, which has made significant investments in mass timber production, manufacturing, and research. This research will be complemented through the development of best practices for using interdisciplinary, collaborative classroom environments to enhance engineering identities of underrepresented minorities and women at the graduate level. This award will support the National Science Foundation (NSF) role in the National Earthquake Hazards Reduction Program and the National Windstorm Impact Reduction Program.The specific goal of this research is to develop a novel framework for robust and ductile mass timber modular construction that can be applied to buildings with varying lateral force resisting systems. Through this framework, the relationship between the rigidity of modular interconnections and overall structural behavior will be investigated. The research objectives of this project are to: (1) quantify the demands in interconnections that provide ductility when the building framing is subjected to combined gravity and lateral forces (seismic and wind); (2) quantify the impact of interconnection configuration and design on the ability of interconnections to meet the strength and serviceability performance criteria for mass timber high-rise modular buildings; (3) quantify ductility and overstrength for mass timber modular construction and explore applicability of conventional seismic performance factors and how these factors influence the adjusted collapse margin ratio for archetype buildings; (4) explore the influence of interconnection stiffness on the behavior of high-rise modular mass timber buildings subjected to wind demands; and (5) explore the relationship between team-focused and interdisciplinary educational practices with engineering identity and knowledge retention. New connection technology will be created and its contribution to the overall building behavior will be investigated through a rigorous testing plan and complex physics-based numerical simulations of archetype buildings subjected to combined gravity and lateral loads (seismic and wind). This research is a critical first step to develop innovative technology that will change how buildings are designed, manufactured, and assembled. This project will enable the Principal Investigator to establish interdisciplinary research, teaching, and mentorship in the area of mass timber and hybrid construction. This research will use the NSF-supported Natural Hazards Engineering Research Infrastructure (NHERI) Boundary Layer Wind Tunnel facility at the University of Florida. Experimental datasets will be archived in the NHERI Data Depot (https://www.DesignSafe-ci.org) and made publicly available.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.