In the ever-evolving landscape of seismic safety and construction standards, a groundbreaking study published in *Yantu gongcheng xuebao* (translated to *Journal of Geotechnical Engineering*) is set to reshape how we classify sites for seismic resilience. Led by LI Min of the Zhejiang Earthquake Agency and LI Xiaojun of Beijing University of Technology, the research delves into the intricacies of site classification methods, offering a fresh perspective that could significantly impact the energy sector and beyond.
The study, which analyzed data from 1,137 drilling sites and corresponding seismic response analyses, compares the site classification methods used in China’s *Code for Seismic Design of Buildings* (GB50011-2016) and the American *International Building Code* (IBC). The findings reveal that while both systems have their strengths, China’s double-index classification method—considering both peak acceleration and characteristic period—shows particular advantages.
“In medium-to-hard soil sites, the dispersion of Class C sites in the United States is the smallest,” explains LI Min. “However, in soft-to-medium soil sites, China’s Class Ⅲ sites exhibit certain weaknesses, and in soft soil sites, China’s Class Ⅳ sites have more obvious advantages.”
This nuanced understanding is crucial for the energy sector, where the stability and safety of infrastructure are paramount. Oil and gas facilities, renewable energy plants, and other critical installations often sit on varied soil types, making accurate site classification essential for seismic risk assessment and mitigation.
The research proposes a new classification method that refines the existing system by calculating equivalent shear wave velocity based on soil layers within a specific depth range. This method also introduces subdivisions within existing classes, such as splitting Class Ⅱ sites into Ⅱ1 and Ⅱ2, and reclassifying certain Class Ⅲ sites as Class Ⅳ based on soil layer thickness and equivalent shear wave velocity.
“This study provides a new solution to establish a more reasonable site classification method,” says LI Xiaojun. “By improving the accuracy of site classification, we can enhance the seismic resilience of infrastructure, which is particularly important for the energy sector where the stakes are high.”
The implications of this research extend beyond immediate safety concerns. More accurate site classification can lead to cost savings by avoiding over-engineering in stable areas and ensuring adequate protection in high-risk zones. It can also streamline regulatory compliance and facilitate smoother project approvals, benefiting developers and investors alike.
As the energy sector continues to expand into new territories, often in seismically active regions, the need for robust and reliable site classification methods becomes ever more pressing. This study, published in *Yantu gongcheng xuebao*, offers a timely and valuable contribution to the field, paving the way for safer, more efficient, and more cost-effective construction practices.
In the words of LI Min, “This research is not just about improving codes; it’s about safeguarding lives and investments in an increasingly interconnected world.” As the industry grapples with the challenges of climate change, urbanization, and technological advancement, such insights are invaluable in shaping a safer and more sustainable future.