Displacement based seismic design procedure for rack structures

基于位移的机架结构抗震设计程序

• 批准号: 488249-2015
• 负责人: Tremblay, Robert
• 金额: $ 1.8万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586151
• 关键词: Displacement; based; seismic; design; procedure

Steel storage racks are self-standing structures designed to support many storage levels of heavy pallet loads. Konstant (Econo-Rack (2015) Inc.) is the largest Canadian manufacturer of racks that are extensively used in Canada for storage of goods in industrial and commercial applications such as production plants, warehouses or distribution centers. They are also used in retail areas open to public. Collapse of rack structures has been observed in past earthquakes, which can pose a major life safety hazard to the public and have considerable economic consequences. Rack structures must therefore be adequately designed to safely resist earthquake effects. Current Canadian seismic provisions for rack structures essentially consist in the traditional force-based design method used for building structures. The method does not reflect the actual seismic response of rack structures along their down-aisle direction. An alternative reliable seismic design method that can take advantage of the actual connection nonlinear properties is needed so that Konstant can offer a wider range of seismic-proof racking structures at more competitive costs. This project aims at developing a new displacement-based approach for the seismic design of rack structures that can fully exploit the large deformation capacity of the structure and control better of peak displacement demands. Guidance and limitations for the application of the method will also be developed. In particular, attention will be paid to the maximum height and/or minimum lateral stiffness and strength requirements that must be satisfied to achieve stable inelastic response when using the method. The study will be based on numerical simulations performed with detailed structural models developed and calibrated using connection and shake table test data available from the industry. Konstant will have direct access and integrate their day-to-day design practice the seismic methodologies, calculations, and technical information that will be generated in this research. This will give Konstant technical advantages that should lead to a broader coverage of the warehouse and distribution market's needs with more cost-effective, yet seismically safe rack designs.

钢制货架是独立式结构，设计用于支撑多个存储层的重型托盘负载。 Konstant（Econo-Rack（2015）Inc.）是加拿大最大的机架制造商，广泛用于 加拿大用于工业和商业应用中的货物存储，如生产工厂，仓库 或配送中心。它们也用于向公众开放的零售区。货架结构的倒塌 在过去的地震中观察到，这可能对公众构成重大的生命安全危险， 经济后果。因此，货架结构必须充分设计，以安全地抵抗地震 方面的影响.加拿大现行的网架结构抗震规定主要包括传统的基于力的 用于建筑结构的设计方法。该方法不能反映网架的实际地震反应 结构沿着它们的下通道方向。另一种可靠的抗震设计方法， 需要实际连接非线性特性的优势，以便Konstant可以提供更广泛的 以更具竞争力的成本提供抗震货架结构。 本计画旨在发展一种新的以位移为基础的网架结构抗震设计方法 能充分发挥结构的大变形能力，较好地控制峰值位移 要求。还将为该方法的应用制定指导和限制。特别是， 应注意最大高度和/或最小横向刚度和强度要求， 在使用该方法时，必须满足以获得稳定的非弹性响应。该研究将基于 使用使用连接开发和校准的详细结构模型进行数值模拟 和可从工业上获得的振动台试验数据。Konstant将直接访问并整合他们的 日常的设计实践中，抗震方法，计算和技术信息， 在这项研究中产生的。这将使康斯坦特的技术优势，应导致更广泛的覆盖面 通过更具成本效益且抗震安全的机架设计，满足仓库和配送市场的需求。