Structural design of Hefei Xinqiao International Airport Terminal 2
The newly built Hefei Xinqiao International Airport Terminal 2 adopts a structural form with a concrete structure at the bottom and a large-span steel structure at the roof.The structural design was based on the building characteristics and site conditions.The process of pile foundation selection and construction procedure under conditions requiring large-scale backfilling due to significant surface undulations of the site were introduced.The determination process of the large-span roof structure system and its supporting structure based on the concept of building structural integration was elaborated in detail.Based on the functional characteristics of the terminal building,the energy dissipation and seismic reduction scheme of the main building using velocity-type damping device was determined through comparison,which improved the energy dissipation capacity of the structure and achieves good seismic performance.The protection methods for steel roofs and their supporting columns were determined through progressive collapse analysis and anti fire analysis.A numerical analysis was conducted on the connection between concrete-filled steel tube column reinforced concrete column with equal cross-sections.Finally,the principles for determining the pipe-to-pipe connection of the roof steel truss were introduced.The results show that the structure design of the terminal is reliable and meets all requirements.
Hefei Xinqiao International Airportintegration of architecture and structurelarge-span steel structureenergy dissipation and absorptionprogressive collapsefire resistant design of steel structures
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