摘要
加腋大板结构在地下室工程中应用较广,但目前有关加腋大板结构的计算分析及其设计方法尚未统一。为深入了解加腋大板结构的受力特性,文中以一个3×3跨加腋大板地下室顶板结构为研究对象,通过有限元软件MidasFEANX,建立了加腋大板结构的三维实体及钢筋有限元模型,进行了非线性有限元分析。分析结果表明,加腋大板结构为典型的梁、板混合受力模式;加腋大板结构存在一定的拱效应,有利于对其裂缝的控制;加腋大板柱顶区域受力较为集中,设计应予以有效加强,梁端箍筋应力较大,设计时可按梁承担所有剪力考虑。采取有针对性的加强措施后,采用梁板有限元方法进行加腋大板结构的设计是经济合理且安全可靠的,有关计算及设计建议可为同类工程提供参考。
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 element 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 targeted 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 reference for similar projects.
作者
刘晟
LIU Sheng(Hunan Fangyuan Architecture Engineering Design Company Limited,Changsha 430000,China)
出处
《低温建筑技术》
2024年第2期87-90,共4页
Low Temperature Architecture Technology
关键词
加腋大板
非线性有限元分析
梁端箍筋
large-span haunched slabs
nonlinear finite element analysis
stirrup stress of beam
