NEESR Planning/Collaborative Research: Engineered Timber Structural Systems for Seismically Resilient Tall Buildings

NEESR 规划/合作研究：抗震高层建筑的工程木结构系统

• 批准号: 1344798
• 负责人: James Ricles
• 金额: $ 7.5万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1344798&HistoricalAwards=false
• 关键词: NEESR; Planning; Collaborative; Research; Engineered

To enable resilient, eight to fourteen story, timber buildings in regions of high seismicity in the United States, this planning grant combines innovative concepts in seismic load resisting systems with a new form of a mass timber structural component, called cross laminated timber (CLT), to research three potential structural systems for resilient, tall CLT building construction: (a) single-story, pre-stressed re-centering walls, (b) multi-story, segmental rocking walls, and (c) deformable floor diaphragms with supplemental damping devices. These systems will be distributed vertically along the height of the building, combining deformable panels or layers with relatively rigid and stiff ones, to leverage CLT behavior, enable rapid construction, and limit the impact of higher modes. Based on their performance in component-level testing and system-level simulation conducted as part of this research, promising systems that are economically competitive will be selected for full-scale experimental investigation in follow-on research. This planning phase research will generate fundamental knowledge on resilient, multi-story panelized systems that have the potential to transform the seismic design of taller buildings in general. As urban densification occurs in U.S. regions of high seismicity, there is a natural demand for tall buildings that can survive large earthquakes with minimal damage and interruption. CLT is a naturally sustainable material that has been used in Europe and Australia to rapidly construct multi-story buildings. However, existing multi-story CLT constructions were limited to regions of low seismicity because there is no seismic design methodology for tall CLT buildings worldwide. In the U.S. Pacific Northwest, there is significant interest in utilizing CLT in eight to fourteen story residential and commercial buildings due to its appeal as a potential locally sourced, sustainable, and economically competitive building material. With combined expertise from the research and design community, this project will address this societal need by prototyping three potential structural systems that are suitable for tall CLT buildings in high seismicity regions, comparing their performance through experimentation and simulation, and developing performance-based seismic design methods for their implementation. Once the optimal systems are selected in this study and verified at full-scale in subsequent research, it is envisioned that a resilient, tall CLT building will become an option for west coast cities in about six to eight years. In addition to providing research training for students working on the project, the project will deliver educational resources to introduce this new sustainable building type to students, stakeholders, and the general public. Data from this project will be archived and made available to the public through the NEES data repository. This award is part of the National Earthquake Hazards Reduction Program (NEHRP).

为了使韧性，八到十四层的故事，在美国高地震性地区的木材建筑物，该计划赠款将抵抗地震负载系统中的创新概念与一种新形式的质量木材结构组件相结合，称为交叉层压木材（CLT） ，研究三个潜在的结构系统，用于弹性，高的CLT建筑结构：（a）单层，预压力重新定居的墙壁，（b）多层次的，分段的摇摆墙，以及（c）可变形的地板隔膜阻尼设备。这些系统将沿建筑物的高度垂直分布，将可变形面板或层与相对较僵硬的面板相结合，以利用CLT行为，实现快速构造并限制较高模式的影响。根据他们在本研究的一部分进行的组件级测试和系统级模拟的性能，将选择具有经济竞争性的有希望的系统，以进行后续研究的全尺度实验研究。 这项计划阶段的研究将产生有关弹性的多层式镶板系统的基本知识，这些系统有可能改变一般建筑物的地震设计。随着城市致密性发生在高地震性的美国地区，对高建筑物的自然需求可以在大型地震中生存，并造成极大的破坏和中断。 CLT是一种自然可持续的材料，在欧洲和澳大利亚已用于快速建造多层建筑。但是，现有的多层CLT结构仅限于低地震性区域，因为全世界的高层CLT建筑没有地震设计方法。 在美国西北太平洋地区，由于其吸引了当地采购，可持续性和经济竞争性的建筑材料，因此在八到十四层的住宅和商业建筑中使用CLT具有重大兴趣。凭借研究和设计社区的联合专业知识，该项目将通过制定适合高地震区域中高大CLT建筑物的三个潜在结构系统来解决这一社会需求，并通过实验和模拟进行比较，并开发基于性能的地震设计实施的方法。一旦在本研究中选择了最佳系统并在随后的研究中在全面进行了验证，就可以预见，在大约六到八年内，一座具有弹性的高层CLT建筑将成为西海岸城市的一种选择。除了为从事该项目的学生提供研究培训外，该项目还将提供教育资源，向学生，利益相关者和公众介绍这种新的可持续建筑类型。 该项目的数据将通过NEES数据存储库进行存档并提供给公众。 该奖项是国家地震危害计划（NEHRP）的一部分。