基于不同跨度密肋楼盖结构受力分析及施工关键技术研究

Research on stress analysis and construction key technology of multi-ribbed floor structure based on different span

随着施工技术的快速发展,密肋楼盖体系被广泛应用到大空间、大跨度的工业厂房、地下停车场、大型商场等建筑结构,然而针对构造柱跨度对密肋楼盖体系的受力及变形的影响研究却不足。本文通过盈建科软件建立研究模型,对比分析了不同柱距跨度以及是否设置柱帽条件下密肋楼盖体系及其关键构件(角柱、边柱、中心柱、边梁和中心梁)的变形、挠度、弯矩、剪力、内力以及应力等关键参数变化趋势。此外,基于受力分析结果,结合实际工业厂房项目阐述了密肋楼盖体系的施工工艺及关键施工技术做了研究分析。结果表明柱距增大与构件变形、挠度、弯矩、剪力、内力以及应力等呈正相关趋势,柱帽的设置可显著降低密肋楼盖体系的受力变形。边柱的弯矩和剪力值最大,而中柱的轴力值最大;中心梁中柱截面端弯矩和剪力最大,边梁的角柱截面端扭矩最大。本研究为密肋楼盖的结构设计和施工提供了重要的参考。

With the rapid development of construction technology,ribbed floor system has been widely applied in large-space and large-span building structures,such as industrial buildings,underground parking lots and large shopping malls.However,a few studies on the stress and deformation analysis of the multi-ribbed floor system based on the structural column spacing were investigated.In this study,the deformation,deflection,bending moment,shear force,internal force and stress of ribbed floor system and its key components(containing corner columns,edge columns,center columns,edge beams and center beams)under different column spacing were compared via the structural model establishing by Yingjianke software.In addition,based on the force analysis results,combined with the actual industrial building project,the construction technology and key construction technology of ribbed floor system were researched.Our results indicated that the increase of column spacing posed a positive correlation with the deformation,deflection,bending moment,shear force,internal force and stress of the members,while the setting of column cap could significantly reduce the deformation of the multi-ribbed floor system.The largest bending moment and shear force were located in the side column and the section end of the column in the center beam,while the largest axial force position was the middle column,and the position with the maximum torque is at the section end of the corner column of the beam.This study provides a crucial reference for the structural design and construction of the multi-ribbed floor.