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.

仓储货架系统广泛应用于仓库建筑的仓储设施。拟议的研究涉及 ARPAC 制造的选择性托盘存储钢架 (SPSSR) 的设计。目前，在地震区设计此类结构还没有适当的指导方针。拟议的研究将通过实验研究机架结构的梁与柱连接、支撑与柱连接和底板与柱连接的专有结构部件的行为以及跨过道和下过道的框架响应方向并制定 SPSSR 抗震设计指南。将评估回弹测试和反向循环负载测试，以确定自然周期、刚度、负载位移响应、迟滞阻尼和各种连接的行为，这对于建立能够准确预测 SPSSR 响应的有限元模型至关重要基于性能的设计正在成为结构抗震设计和评估的标准做法，以实现可靠且令人满意的性能水平。加拿大对 SPSSR 抗震性能的研究很少。本研究将研究在增加的横向载荷下 SPSSR 系统不同组件之间的相互作用，并评估各种损坏状态、失效机制及其崩溃行为。这将有助于确定足够的截面尺寸和连接细节。开发的数值模型将首先通过实验结果进行验证。然后，该模型将用于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正系数。 IDA 结果还将用于观察不同位移水平下的损伤机制，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件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。