The application of large-span haunched slabs in basement engineering is widespread,but currently,the analysis and design methods for the slabs have not been unified.The basement roof structure of a 3×3 large-span haunched slabs is taken to study the mechanical properties of the slabs.3D solid and steel reinforcement finite ele-ment model of large-span haunched slabs is established through the finite element software Midas FEA NX,,in which the nonlinear finite element analysis is carried out.The analysis results show that large-span haunched slab is a typical beam-plate mixed force mode.A certain arch effect exists in the slab,which is conducive to the control of cracks.Stress concentration exists in the top area of columns,which should be effectively strengthened;stirrup stress of beam end is reflectively large,and the mode of all shear force carried by beams should be considered.After target-ed strengthening measures are taken,it is economical,reasonable,safe and reliable to use beam-plate finite element method for the design of large-span haunched slabs,and the calculation and design suggestions can be used as a ref-erence for similar projects.
large-span haunched slabsnonlinear finite element analysisstirrup stress of beam
万方数据
维普
