Developing seismic design guidelines for pallet racks

制定托盘架的抗震设计指南

• 批准号: 560763-2020
• 负责人: Alam, Shahria
• 金额: $ 2.91万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=721798
• 关键词: Developing; seismic; design; guidelines; pallet

Storage rack systems are widely used for storage facilities in warehouse buildings. The proposed research deals with the design of Selective Pallet Storage Steel Racks (SPSSRs) manufactured by ARPAC. Currently, there are no proper guidelines for designing such structures in seismic regions. The proposed research will experimentally investigate the behavior of proprietary structural components of beam-to-column connections, brace-to-column connections, and baseplates-to-column connections of rack structures and the frame response in both cross-aisle and down-aisle directions and develop seismic design guidelines for SPSSRs. Snapback test, and reversed cyclic loading tests will be evaluated to determine the natural period, stiffness, load-displacement response, hysteretic damping, and behavior of various connections, which will be critical to establishing finite element models that can accurately predict the response of SPSSRs.Performance-based design is becoming a standard practice for seismic design and evaluation of structures to achieve a reliable and satisfactory level of performance. There has been little study on the seismic performance of SPSSRs in Canada. This study will examine the interaction among different components of the SPSSR systems under increased lateral loads and evaluate various damage states, failure mechanisms, and its collapse behavior. This will help determine adequate section sizes and connection details. The developed numerical models will be first validated with experimental results. Then the models will be utilized to simulate the response of SPSSRs with various configurations. Incremental dynamic analyses (IDA) will be performed as per FEMA P-695 procedure to develop force modification factors for force-based design procedure. The IDA results will be also utilized to observe the damage mechanism at various displacement levels to come up with the displacement-based design procedure. This study will provide performance-based design solutions for rack structures and their elements. The significance of this research is paramount as it directly contributes to the safety and security of Canadian rack infrastructure.

存储架系统广泛用于仓库建筑物中的存储设施。拟议的研究涉及ARPAC生产的选择性托盘储物钢架（SPSSR）的设计。当前，没有适当的指南来设计地震区域的此类结构。拟议的研究将在实验中研究光束到柱连接的专有结构组成部分，支撑柱与柱子连接以及架子结构的基本连接以及跨隔离和下通道方向的框架响应，并制定SPSSR的地震设计指南。将评估快照测试和反向的循环加载测试，以确定自然周期，僵硬，负载置换响应，滞后阻尼和各种连接的行为，这对于可以准确预测SPSSRS的响应至关重要，这些模型至关重要，这些模型可以预测基于绩效的设计的响应。效果设计的标准实践可以使绩效和评估的标准实践达到可靠的结构。关于加拿大SPSSR的地震性能的研究很少。这项研究将检查SPSSR系统的不同组件在增加的侧向载荷下的相互作用，并评估各种损伤状态，失败机制及其崩溃行为。这将有助于确定足够的截面大小和连接详细信息。开发的数值模型将首先通过实验结果进行验证。然后，将使用模型来模拟具有各种配置的SPSSR的响应。将根据FEMA P-695程序进行增量动态分析（IDA），以开发基于力的设计程序的力修饰因子。 IDA结果还将用于观察各种位移水平的损伤机制，以提出基于位移的设计程序。这项研究将为机架结构及其元素提供基于性能的设计解决方案。这项研究的意义至关重要，因为它直接有助于加拿大机架基础设施的安全性。