In logistic field, Automated Rack Supported Warehouses (ARSWs) are buildings for the storage of goods which adopts the steel racks as both stoking areas and primary structural system. Re-cent collapses and damages after seismic events highlighted the criticalities of the current de-sign, which is based on the regulations for traditional racks (i.e. EN16681) or for ordinary buildings (as Euro-codes) that are not fully appropriate, given the peculiarities of ARSWs. In this paper, possible so-lutions to design dissipative and seismic-resistant ARSWs are investigated. Starting from the tech-nical solutions currently adopted and from regulations for dissipative buildings, global optimization is performed with the aim of selecting the most appropriate structural type allowing to fulfill all the requirements (i.e. the hierarchy rules). Then, local optimization is carried out for the dissipative elements, with the aim of obtaining an over-resistant connection with respect to the element. Indeed, the fulfillment of this request is challenging for the profiles adopted in ARSWs, which are thin walled, implying a limited bearing capacity of the connection. As a solution to this issue, the cross section of the profiles is locally reduced to limit tensile resistance, but this also weaken the element, affecting the behaviour in compression and due to cyclic loading. Numerical optimization is per-formed for the optimization of the layout of the reduced parts, aiming to find the right balance among tensile resistance, ductility demand and good performance in compression.
A DESIGN PROPOSAL FOR DISSIPATIVE SEISMIC-RESISTANT AUTOMATED RACK SUPPORTED WAREHOUSES
Agnese Natali;Francesco Morelli;Walter Salvatore
2022-01-01
Abstract
In logistic field, Automated Rack Supported Warehouses (ARSWs) are buildings for the storage of goods which adopts the steel racks as both stoking areas and primary structural system. Re-cent collapses and damages after seismic events highlighted the criticalities of the current de-sign, which is based on the regulations for traditional racks (i.e. EN16681) or for ordinary buildings (as Euro-codes) that are not fully appropriate, given the peculiarities of ARSWs. In this paper, possible so-lutions to design dissipative and seismic-resistant ARSWs are investigated. Starting from the tech-nical solutions currently adopted and from regulations for dissipative buildings, global optimization is performed with the aim of selecting the most appropriate structural type allowing to fulfill all the requirements (i.e. the hierarchy rules). Then, local optimization is carried out for the dissipative elements, with the aim of obtaining an over-resistant connection with respect to the element. Indeed, the fulfillment of this request is challenging for the profiles adopted in ARSWs, which are thin walled, implying a limited bearing capacity of the connection. As a solution to this issue, the cross section of the profiles is locally reduced to limit tensile resistance, but this also weaken the element, affecting the behaviour in compression and due to cyclic loading. Numerical optimization is per-formed for the optimization of the layout of the reduced parts, aiming to find the right balance among tensile resistance, ductility demand and good performance in compression.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
