Displacement based seismic design procedure for rack structures

钢存储架是自立式结构，设计用于支持多个存储级别的重型托盘负载。 Konstant(Econo-Rack(2015)Inc.)是加拿大最大的机架制造商，广泛用于 加拿大用于储存工业和商业应用中的货物，如生产工厂、仓库 或者配送中心。它们也被用于向公众开放的零售区。机架结构的倒塌已经 在过去的地震中观察到的，这可能对公众的生命安全构成重大威胁，并具有相当大的 经济后果。因此，机架结构必须充分设计，以安全地抗震 效果。目前加拿大对机架结构的抗震规定基本上存在于传统的基于力的 用于建筑结构的设计方法。该方法不能反映机架的实际地震反应。 沿其下过道方向的结构。另一种可靠的抗震设计方法 需要利用实际连接的非线性特性，以便Konstant能够提供更广泛的 以更具竞争力的成本提供抗震机架结构。 本项目旨在开发一种新的基于位移的机架结构抗震设计方法。 可以充分发挥结构的大变形能力，更好地控制峰值位移。 要求。还将为该方法的应用提供指导和限制。特别是， 应注意满足以下条件的最大高度和/或最小横向刚度和强度要求 在使用该方法时，必须满足获得稳定的弹塑性响应。这项研究将基于 使用Connection开发和校准了详细的结构模型并进行了数值模拟 以及业界提供的振动台试验数据。Konstant将可以直接访问并集成他们的 日常设计实践地震方法论、计算和技术信息 在这项研究中产生的。这将给Konstant带来技术优势，应该会带来更广泛的覆盖 凭借更具成本效益且抗震安全的货架设计，满足仓储和配送市场的需求。

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.