Analysis on key issues for design of large-span steel corridors in connected tall building
Based on the actual project,aiming at the key technical problems in the design of multi-tower conjoined large-span steel corridors,the overall elasticity and elastoplastic analysis of the multi-tower weak-connected structure were carried out,the influence of the large-span steel corridor on the mechanical and seismic behavior of the tower,as well as the vibration characteristics and vibration control of the corridor were studied.The results show that it is a reasonable and feasible solution to use the weak-connected scheme to reduce the influence of the connection body on each tower.For the tower connected to the corridor by sliding bearings,the dynamic characteristics and seismic response of the independent and overall models are basically the same,and the design can be carried out according to the calculation results of the independent model.For the tower connected to the corridor by fixed hinge bearings,the dynamic characteristics and seismic response of the independent and overall models are quite different.Hence,the influence of the corridor on the seismic behavior should be considered,and the envelope design should be carried out according to the calculation results of the overall model and the independent model.The layout and selection of bearings in the corridor realize the expected weak-connected design concept and meet the deformation requirements under severe earthquake.The vertical vibration acceleration response of the long-span steel corridor using TMD is significantly reduced under the excitation of crowd load,the vibration reduction rate reach 70%,and the vertical vibration acceleration meets the requirements of the specification.
connected buildinglarge-span steel corridorweak connectionseismic behaviorvibration control
万方数据
维普
