APPLICATION OF“DELAY CONNECTION”TECHNOLOGY OF OUTRIGGER TRUSS FOR SUPER TALL BUILDINGS IN MAIN TOWER OF SHENYANG HENGLONG PLAZA PROJECT

As the horizontal load is the dominant factor for a super tall building，setting outrigger can improve the overall performance of the structure，so as to improve the lateral stiffness of the structure，control the displacement on top of the structure，and reduce overturning moment that core tube bears． However，when the outrigger trusses are in construction stage，the rate of progress of construction between the frame and core tube is not synchronous and structure arrangement is unequal etc，which will lead to uneven deformation between the frame and core tube． If the outrigger trusses are blindly installed，a greater internal stress will be generated in outrigger truss，which may cause the bearing condition of the whole structure can not match the original structure design model after the structure is finished． It was proposed a“delay connection”construction technology of outrigger truss for super tall buildings，and the use of this method in the construction of the main tower of Shenyang Henglong Plaza showed that it could effectively solve the problem of more stress generated in outrigger truss that caused by the uneven deformation between the frame and core tube; and also ensured the smooth installation of outrigger truss and the structural performance in the using stage．