Welcome to the official website of Suzhou Express Freight Co., Ltd!
Hotline
400-1630-991 0512-65392209
Location:Home > News > About Sushijie

How is the logistics storage center earthquake resistant?

It is understood that the current earthquake resistance of the logistics storage center mainly focuses on how the earthquake-resistant civil buildings, the design of the three-dimensional warehouse are earthquake-resistant, and how the high-rise shelves and stackers in the warehouse are earthquake-resistant. The displacement caused by the earthquake in the earthquake has little effect on the logistics center.
1. Earthquake resistance of civil engineering
 
The seismic capacity of the civil construction of the warehouse is directly related to the seismic capacity of the entire logistics center. Once the building collapses, the equipment will not be spared. The earthquake resistance of the civil construction is the most important factor for the earthquake resistance of the logistics center
 
At present, there is no specific code for seismic design of logistics buildings. The seismic design of logistics buildings refers to the provisions in the "Code for Seismic Design of Buildings". According to the seismic fortification intensity of buildings, China mainly divides buildings into four categories: A, B, C and D. According to the traditional view, the single-storey warehouse is regarded as a D-type building. However, due to the rapid development of the logistics industry in recent years, there have been many high-rise three-dimensional warehouses with important functions, whose height is several times higher than that of traditional warehouses. In fact, such storage centers can no longer be regarded as D-type buildings, let alone Ding. Class buildings require seismic fortification.
 
Seismic fortification is usually achieved through the following steps: determining the seismic fortification requirements, that is, determining the ability of the building to resist earthquake disasters; seismic design, taking seismic measures such as foundations and structures to meet the seismic fortification requirements; seismic construction, strictly in accordance with seismic design and construction , To ensure the quality of the building; seismic management, the building in use must not change the internal structure of the building at will.
 
2. Three-dimensional warehouse seismic
 
In recent years, China's logistics industry has developed rapidly, and many advanced three-dimensional warehouses have been built around the country. The three-dimensional warehouse is different from the traditional warehouse. Not only is the height of several warehouses, but also the logistics equipment is more sophisticated, and the secondary disaster will be more serious.
 
Since the collection of equipment seismic data and the determination of parameters are far more complicated than civil construction, the research on equipment seismic is limited to nuclear equipment, power equipment and other important equipment, and the seismic research of logistics equipment has not been touched.
 
At present, there is no seismic standard or industry standard for the logistics equipment in the three-dimensional warehouse. It mainly depends on the system integrator when designing and planning. The main consideration is how to design the part of the logistics equipment and the warehouse that is the foundation design. Generally, the embedded channels of the three-dimensional warehouse can be pre-embedded, that is, when pre-embedded, each row of embedded bolts connected to the shelf column is connected by the entire channel steel, and then the angle steel is used between the channel steel The connection makes the whole ground form a whole with the shelf and the steel structure of the building and the color steel plate, and its seismic resistance is greatly enhanced. Another method to reduce the difficulty of construction is to bury the main reinforcement of the foundation in the lower layer, and the upper layer can be laid with some thin steel bars, which can be cut and subdivided into multiple pieces on the ground, so that the foundation is still a whole after construction.
 
In addition to considering the foundation pressure under the static load of the stacker and the rack, the increase of other loads under the earthquake condition, the horizontal pressure during the earthquake and the upward pulling force of the stacker, etc., these values ​​will become Times increase. In addition, the destruction of the three-dimensional warehouse software by the earthquake also needs to be considered. During the earthquake, some equipment in the three-dimensional warehouse will be damaged, which will cause the communication network of the information system to be interrupted, and the information of the damaged goods and equipment will be lost. What's more, it will further affect the command capability of the entire system and cause all equipment in the warehouse to strike. Therefore, when designing the information system, it is best to consider that when one or several equipment encounters an earthquake or other accident, the equipment will stop working, but it will not affect the normal operation of other equipment.
 
3. Earthquake resistance of high-rise equipment
 
When the three-dimensional warehouse is earthquake-proof, in addition to the earthquake resistance of civil buildings and the system's earthquake-resistant design, the most important thing is to consider how high-rise equipment such as shelves and stackers have earthquake resistance. This kind of anti-seismic ability mainly depends on the quality of the shelf itself, the auxiliary equipment such as the stacker connected to the shelf, and the design and installation of the connection between them.
 
The seismic resistance of the shelf mainly depends on its rigidity and flexibility. The stiffness mainly depends on the strength of the selected shelf production material and the thickness of the shelf. The importance of flexibility is equivalent to stiffness, which mainly depends on the design of the shelf structure. The stiffness and relative flexibility are better determined, and it is more difficult to determine the flexibility, because the structural design currently does not have a unified standard in China, and there is no unified calculation basis and method. Each manufacturer has its own set of analysis methods, in other words, it is different. Manufacturers have the same seismic intensity, and the shelf parameters calculated and analyzed by different manufacturers may be different. In this case, it is necessary to strengthen the supervision of the calculation method. The bidding party can take the mandatory measures in the bidding. Advantage of quotation.
 
For the high-level stacker, its auxiliary equipment, namely the sky rail and the ground rail, need to prevent distortion, deformation or even breakage during the earthquake.
 
Finally, in the use and management of a three-dimensional warehouse, it must be operated in accordance with the maintenance manual of the three-dimensional warehouse, and the necessary inspection and maintenance should be carried out within the specified time. Pay attention to the principle of preferential storage of low-level shelves, that is, the goods are stacked in the lower shelf first and then the upper shelf. In this way, one can save energy, and the other should avoid being top-heavy in order to facilitate earthquake resistance.