Collaborative Research: A Resilience-based Seismic Design Methodology for Tall Wood Buildings

合作研究：基于弹性的高层木结构抗震设计方法

• 批准号: 1635156
• 负责人: James Dolan
• 金额: $ 18万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1635156&HistoricalAwards=false
• 关键词: Collaborative; Research; Resilience; based; Seismic

As the U.S. population continues to grow in urban communities, the demand for tall residential and mixed-use buildings in the range of eight to twenty stories continues to increase. Buildings in this height range are commonly built using concrete or steel. A recent new timber structural innovation, known as cross laminated timber (CLT), was developed in western Europe and is now being implemented around the world as a sustainable and low carbon-footprint alternative to conventional structural materials for tall buildings. However, an accepted and validated design method for tall CLT buildings to resist earthquakes has not yet been developed, and therefore construction of these tall wood buildings in the United States has been limited. This research will break this barrier by investigating a seismic design methodology for resilient tall wood buildings that can be immediately re-occupied following a design level earthquake and quickly repaired (compared to current building systems) after a large earthquake. Using the seismic design methodology developed in this project, the research team will work with practitioners across the engineering and architectural communities to design, build, and validate the performance of a ten-story wood building by conducting full-scale sub-assembly system testing at the National Science Foundation (NSF)-supported Natural Hazards Engineering Research Infrastructure (NHERI) experimental facility at Lehigh University, followed by full-scale tests at the NSF-supported NHERI outdoor shake table at the University of California at San Diego. This research will enable a new sustainable construction practice that is also cost-competitive, thereby increasing demands for engineered wood production, providing added value for forest resources, and enhancing job growth in the construction and forestry sectors. As part of the research, the experimental programs will serve to provide outreach to the public and stakeholders on issues related to seismic hazard mitigation, modern timber engineering, and resilient building concepts.The goal of this research is to investigate and validate a seismic design methodology for tall wood buildings that incorporates high performance structural and non-structural systems. The methodology will quantitatively account for building resilience. This will be accomplished through a series of research tasks planned over a four-year period. These tasks will include mechanistic modeling of tall wood buildings with several variants of post-tensioned rocking CLT wall systems, fragility modeling of structural and non-structural building components that affect resilience, full-scale bi-directional testing of building sub-assembly systems, development of a resilience-based seismic design methodology, and finally a series of full-scale shake table tests of a ten-story CLT building specimen to validate the investigated design. The structural systems investigated will include post-tensioned CLT rocking walls in both monolithic and segmental rocking configurations. Implementing segmental rocking walls in a full building system will be a transformative concept that has yet to be realized physically. The rocking wall systems will be investigated under the context of holistic building behavior, including gravity systems and non-structural components. The research team will further push the boundary of existing performance-based seismic design by developing a design procedure that explicitly considers the time needed for the building to resume functionality after an earthquake. With the large-scale testing capacity provided by the NHERI experimental facilities, the design methodology will be experimentally validated, which will at the same time generate a landmark data set for tall wood buildings under dynamic loading that will be available to the broader research and practitioner community through the NHERI DesignSafe-ci.org Data Depot. The project will facilitate implementation of this new structural archetype by interfacing closely with practitioners in the Pacific Northwest interested in tall CLT buildings as a cost-competitive design option. Graduate and undergraduate students, including community college students, will actively participate in this research and gain valuable knowledge and experience, which will prepare them to become leaders in sustainable building practices using modern engineered wood materials.

随着美国城市社区人口持续增长，对八至二十层高层住宅和混合用途建筑的需求持续增加。 此高度范围内的建筑物通常使用混凝土或钢材建造。 最近一种新的木结构创新，称为交叉层压木材（CLT），是在西欧开发的，目前正在世界各地实施，作为高层建筑传统结构材料的可持续和低碳替代品。然而，目前尚未开发出一种公认且经过验证的高层 CLT 建筑抗震设计方法，因此这些高层木结构建筑在美国的建设受到了限制。这项研究将通过研究弹性高层木建筑的抗震设计方法来打破这一障碍，这些建筑可以在设计水平的地震后立即重新占用，并在大地震后快速修复（与当前的建筑系统相比）。使用该项目中开发的抗震设计方法，研究团队将与工程和建筑界的从业者合作，设计、建造并验证十层木结构建筑的性能，方法是在美国国家科学基金会 (NSF) 支持的理海大学自然灾害工程研究基础设施 (NHERI) 实验设施中进行全面的分组件系统测试，然后在 NSF 支持的 NHERI 户外振动台位于加州大学圣地亚哥分校。这项研究将实现一种具有成本竞争力的新的可持续建筑实践，从而增加对工程木材生产的需求，为森林资源提供附加值，并促进建筑和林业部门的就业增长。作为研究的一部分，实验项目将向公众和利益相关者提供与减轻地震灾害、现代木材工程和弹性建筑概念相关的问题的宣传。这项研究的目标是调查和验证结合了高性能结构和非结构系统的高层木结构建筑的抗震设计方法。该方法将定量地考虑建立弹性。这将通过四年内计划的一系列研究任务来完成。这些任务将包括采用多种后张法摇摆 CLT 墙系统对高层木结构建筑进行机械建模、影响弹性的结构和非结构建筑构件的脆弱性建模、建筑分组件系统的全尺寸双向测试、基于弹性的抗震设计方法的开发，以及最后对十层 CLT 建筑样本进行一系列全尺寸振动台测试，以验证所研究的结果 设计。所研究的结构系统将包括整体式和分段式摇摆配置的后张 CLT 摇摆墙。 在完整的建筑系统中实施分段摇墙将是一个尚未在物理上实现的变革性概念。摇墙系统将在整体建筑行为的背景下进行研究，包括重力系统和非结构部件。研究团队将通过开发明确考虑建筑物在地震后恢复功能所需的时间的设计程序，进一步突破现有基于性能的抗震设计的界限。凭借 NHERI 实验设施提供的大规模测试能力，设计方法将得到实验验证，同时将生成动态荷载下高层木结构建筑的标志性数据集，该数据集将通过 NHERI DesignSafe-ci.org 数据仓库提供给更广泛的研究和从业者社区。该项目将通过与太平洋西北地区对高层 CLT 建筑作为具有成本竞争力的设计选择感兴趣的从业者密切合作，促进这种新结构原型的实施。研究生和本科生，包括社区学院的学生，将积极参与这项研究并获得宝贵的知识和经验，这将使他们成为使用现代工程木质材料的可持续建筑实践的领导者。

项目成果

Seismic Response of Post-Tensioned Cross-Laminated Timber Rocking Wall Buildings

后张法交叉层压木摇墙建筑的地震响应

• DOI: 10.1061/(asce)st.1943-541x.0002673
• 发表时间: 2020
• 期刊: Journal of structural engineering
• 影响因子: 4.1
• 作者: Wilson, A.;Motter, C.;Phillips, A.;Dolan, J.
• 通讯作者: Dolan, J.

From Testing to Codification: Post-tensioned Cross Laminated Timber Rocking Walls

从测试到编码：后张交叉层压木摇墙

• 发表时间: 2019
• 期刊: Proceedings of the International Network for Timber Engineering Research (INTER
• 作者: Pei, S.;Dolan, J.;Zimmerman, R.;McDonnell, E.;Line, p.;Popovski, P.
• 通讯作者: Popovski, P.