Several critical technical issues of structural design and analysis for a tree-shaped high-rise building
The critical technical issues encountered in the structural design and analysis of a tree-shaped high rise building were mainly analyzed and studied,such as the structural realization of the large cantilever scheme of the building,the analysis of vertical force load path,the analysis of anti-progressive collapse,the performance-based design of key components,the analysis of the tensile capacity of floor system,and the detailed finite element analysis of connections,etc.At the same time,the wind-resistant design of the structure,the setting of dual cores at the north and south sides,the partial tension of local shear walls,the second-order effect of gravity and other technical problems were carried out and solutions were provided.The results show that although the high-rise building has the difficulties such as complex shape,large cantilever,irregular plan and offset cores,etc.,the safety of the structure can be well guaranteed by reasonable plan and vertical configuration,supplemented by detailed structural analysis.In particular,the large cantilever effect of the building can be well realized through the local transfer by bracing with a reliable,direct and concise load path for vertical forces.The anti-progressive collapse analysis was carried out from two working conditions of removing the bracing in turn and removing all the bracings at one time.The tensile capacity of floor system was checked against two cases of completely ignoring the effect of slabs and considering the construction simulation of post-pouring relevant floor slabs.The fine finite element analysis of the beam-bracing transfer connection was performed.Finally,through further check,it can be well ensured that the proposed performance-based design goals can be reached under different levels of earthquakes.
high-rise buildingbracing transferanti-progressive collapse analysispartial tension of shear wallsecond-order effect of gravity
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