Lijiang Sanyi International Airport: An Outstanding Example of Friction Pendulum Isolation Engineering
2025-03-20
Project Overview
Lijiang Sanyi International Airport is located in Sanyi Village, Qihe Township, Lijiang City, Yunnan Province, China. With its advantageous geographical location, it has become a key node in the regional transportation network. The terminal building of the airport features an ingenious design, with two above - ground floors (three floors in some areas) and two underground floors (including one isolation layer).
In terms of structural design, the project has a design reference period of up to 50 years, and the structural safety level reaches the first - class standard. Since the seismic fortification intensity at the airport location is VIII degrees, the basic seismic acceleration is 0.3g, the building site category is determined as category Ⅲ, the design characteristic period is 0.65s, the seismic fortification category belongs to class B, the design earthquake group belongs to group Ⅲ, and the site is adjacent to a fault zone, a near - field coefficient of 1.5 needs to be considered. This series of complex geological and seismic conditions makes seismic design a top priority for the entire project.
Terminal Building Isolation Product Design
In the core area of the isolation design - the central area, the friction pendulum isolation bearings adopted utilize an advanced double - curved surface design. This design strictly complies with the current codes and standards. From the maintenance - free life of the bearing connectors, the operating temperature range, to the details of the bearing structure, all are ensured to meet the highest standards. In the production process, a surface pressure parameter of 25MPa is carefully selected for manufacturing, and a total of six different types of bearings have been developed. These bearings have a wide range of reference vertical bearing capacities, from 5000kN to 40000kN, which can meet the bearing requirements of different structural parts. At the same time, the ultimate displacement of the bearings uniformly reaches 700mm, the friction coefficient is 0.04 under slow - speed conditions and 0.06 under fast - speed conditions, and the swing period is set at 3.5s, with a total number of 364. Such a precise design and large - scale configuration have built a solid guarantee line for the overall structural stability of the terminal building.
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