Structural design of a large complex commercial conjoined structure in Suzhou
A large commercial complex project in Suzhou is located in the seismic fortification intensity area of 7 degrees.It is a building with overlapping shapes.The building is divided into five independent structural units by five seismic joints:shopping center area A,shopping center area B,parking building,commercial street area A and commercial street area B.The shopping center area A is a complex connected high-rise building,the frame shear wall structure is used in 1～5 floors,the two individual buildings are connected by steel trusses in the middle area of the 3～5 floors,the top(6th floor)steel truss structure is connected to the two individual buildings through finished ball joint supports,forming a strong connected structure.After fully considering the balance of cycle ratio and displacement ratio,the layout of shear walls in shopping center area A was optimized.The roof steel truss structure supports were designed with variable stiffness,and sliding bearings were locally installed to solve the problem of high stress of members under constant load.The complex structural connection can meet the performance goals of medium earthquake elasticity and non-yielding during large earthquakes by performance-based design.Performance-based design and specialized analyses show that the cinema steel structure has good seismic performance,floor comfort,and anti-collapse performance.
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