Study on design of over-limit high-rise complex structure with great atrium and weak connection
A special irregular over-limit high-rise structure in Beijing is a modern enterprise headquarters with functions of office,conference,transaction,exhibition and display,science and technology.The above-ground structure adopts steel beam and steel pipe column(local giant column)frame-giant truss conversion-reinforced concrete tube hybrid structure system.Due to the high atrium of the building function,some vertical bearing members can not be landed,and the conversion truss between the outer conversion truss and the core tube is used for conversion.In order to enhance the integrity and torsion resistance of the structure,reinforced trusses and outrigger trusses are set up in two refuge floors and roof floors.The performance of the whole structure was checked and the key components were strengthened.The analysis results show that the indicators meet the design requirements,and the structural performance is safe and reliable.