In the face of natural disasters, the safe and stable operation of industrial facilities is directly linked to the lifeblood of the socio-economy and the well-being of the people. Among these, food processing plants—as a critical link in the supply chain for daily necessities—play a particularly vital role in terms of seismic resilience. Should they sustain damage during an earthquake, it would not only result in massive economic losses but could also lead to disruptions in the food supply, affect people’s basic living needs, and even pose public health risks. Therefore, formulating and implementing scientific and effective seismic retrofitting plans for food processing plants and similar precision production environments (such as electronics manufacturing facilities) is the cornerstone of ensuring stable public supply and maintaining normal social operations.
Food processing plants and electronics manufacturing facilities share commonalities in their seismic requirements, yet each has its own unique characteristics. The commonality lies in the fact that both typically house a large number of precision instruments, piping systems, and automated production lines. These facilities are extremely sensitive to vibrations; even slight displacement or deformation can lead to equipment shutdowns, product scrapping, or production line failures. Their specific characteristics are as follows: food processing plants involve the storage of large volumes of liquid materials, cold chain systems, and sanitary-grade piping, making them prone to leaks and contamination after an earthquake; while electronics manufacturing facilities demand extremely high standards for clean environments, micro-vibration control, and the stability of precision instruments. Therefore, seismic retrofit solutions must go beyond general industrial building standards and employ “customized” design and reinforcement.
A comprehensive seismic retrofitting plan is typically implemented through a coordinated approach across three levels: the structural system, non-structural components, and equipment. At the structural level, common retrofitting methods for existing facilities include adding seismic walls, wrapping and reinforcing beams and columns with carbon fiber fabric or steel plates, installing support systems, or adopting advanced technologies such as base isolation and energy-dissipating damping. In particular, base isolation technology—which involves installing isolation bearings at the building’s base—effectively dissipates seismic energy and significantly reduces the seismic response of the superstructure. This offers significant advantages in protecting expensive production lines within the facility and maintaining production continuity.
Seismic reinforcement of non-structural components is often overlooked but is crucial for ensuring uninterrupted operations. This includes the systematic anchoring and connection reinforcement of factory roofs, wall panels, suspended ceilings, ventilation ducts, cable trays, and various types of warehouse shelving. In food processing plants, the securing of large storage tanks and reactors, as well as the flexible connection design of conveying pipelines, must undergo rigorous seismic calculations to prevent secondary disasters and production interruptions caused by overturning, slippage, or fracture.
Seismic reinforcement at the equipment level serves as the final line of defense for ensuring production capacity. Core production equipment, precision instruments, control cabinets, and similar items should be secured using specialized seismic bases or seismic brackets. For boilers and refrigeration units in food processing plants, as well as precision lithography machines and testing equipment in electronics facilities, specialized seismic analysis and reinforcement design are particularly necessary to ensure functional integrity under seismic loads. At the same time, emergency response plans for critical equipment should be established, including procedures for rapid reset and maintenance.
Implementing seismic retrofitting is not merely an engineering activity but a systematic risk management project. It requires integrating seismic principles from the initial stages of site selection and design. For existing facilities, professional seismic performance assessments must be conducted, and economically sound retrofitting strategies formulated based on the assessment results. During the retrofitting process, full consideration must be given to the impact on existing production operations. Phased and zoned construction approaches should be adopted to minimize disruption to normal production schedules.
Ensuring the seismic safety of food processing plants safeguards the stability of dining tables in countless households and serves as a vital manifestation of socioeconomic resilience. By adopting advanced, comprehensive seismic retrofitting technologies to enhance the seismic resilience and disaster prevention capabilities of these critical infrastructure projects, we are not only protecting assets but also fulfilling our responsibility to society and public welfare. Ensuring that every factory building remains standing during an earthquake and that every production line can resume operations quickly afterward is both an engineering objective and a solid foundation for maintaining long-term social stability and ensuring the stability of public supply.