Structural design of an out-of-code high-rise building with convex irregular plane and split-level floors and through layer walls
Based on the irregular unevenness of a certain plane and the presence of staggered floors and high walls in an o-ver limit high-rise building structure,the various indicators of the structure under small earthquakes and wind loads were first analyzed;Secondly,a detailed analysis was conducted on the stress of the floor slab at irregular weak connections;We conducted a focused analysis on the design of shear walls at staggered levels and the out of plane calculation length of the bottom height wall;Finally,the large earthquake elastoplastic time history analysis method was used to verify the plas-tic displacement angle between the weak layers of the structure.The analysis results indicate that for irregular structures with single limb orthogonal form,the thickness and reinforcement of the floor slab in the connection range between the sin-gle limb and the central area should be strengthened.Under moderate earthquake action,the floor slab meets the tensile elasticity of the steel bars and the concrete does not yield in shear resistance;Under the action of a moderate earthquake,shear walls at staggered levels will be subjected to additional shear forces and bending moments outside and inside the plane caused by the displacement of upper and lower floors.The vertical reinforcement of wall segments should take the envelope value of the calculation results outside and inside the plane;The calculation length outside the plane of the high-rise wall cannot be blindly applied to the standard calculation formula,and its calculation length should be examined from the perspective of the overall structure;For complex over limit high-rise buildings with irregular planar irregularities,elas-tic dynamic time history should be used to supplement and verify whether the inter story displacement angle meets the specification requirements.
convex irregular planeout-of-code high-rise structuresplit-levelthrough layer wallelastoplastic time his-tory analysis
万方数据
维普
