摘要
为了探究高层六边形网筒结构可靠变形转角对该类结构抗震设计的影响,文中在高层六边形网筒结构主要受力构件基本构成的基础上,提出了一种该类结构变形转角简化计算方法。通过考虑结构弯曲变形和剪切变形的影响,给出了典型六边形细胞单元剪切、弯曲刚度简化计算式,建立了六边形网筒结构子模块的变形转角和腹板角部斜柱轴向应变之间关系。构建一个48层四种不同角度的六边形网筒结构有限元计算模型,在不同荷载作用下进行了结构静力弹性分析。研究结果表明:在33.69°,53.13°,63.43°和69.44°斜柱角度影响下本文所提结构变形转角简化计算结果与有限元模型分析结果误差分别为6%,3%,0.08%和13%;在侧向均布荷载、倒三角形荷载和顶点集中荷载模式下二者误差分别为4%,2%和6%。这说明文中提出的不同斜柱角度和侧向荷载作用下结构子模块变形转角计算方法可行,以期为高层建筑六边形网筒结构抗震设计提供参考。
The study aims to investigate the influence of the dependable deformation angle on the seismic design of high rise hexagonal grid tube structures.A new simplified calculation method is proposed in the paper for lateral deformation angle of high rise hexagonal grid tube structures based on the mechanical model of the main load bearing components.Considering the impacts of structural bending deformation and shear deformation,a simplified formula for calculating the shear and bending stiffness of typical hexagonal cell elements is presented,and then the relationship between the deformation angle of the hexagonal grid tube structural cell module and the axial strain of the inclined column at the corner of the web is established.The finite element model of 48 floor hexagonal grid tube structures with different inclined angles of the columns is established,with which the static elastic analysis under different load types is made.The results show that,for the inclined column angles of 33.69°,53.13°,63.43°and 69.44°,the errors between the results obtained by the proposed simplified calculation method and the ones obtained by the finite element model analysis are 6%,3%,0.08%and 13%,respectively and that,for lateral uniform load,inverted triangular load,and apex concentrated load,the errors are 4%,2%,and 6%,respectively.These results indicate that the calculation method proposed in this paper is workable,which is expected to provide reference for the seismic design of hexagonal grid tube structures in high rise buildings.
作者
符子欣
李志军
汤若辰
FU Zixin;LI Zhijun;TANG Ruochen(School of Architecture and Engineering,Xi'an Technological University,Xi’an 710021,China)
出处
《西安工业大学学报》
CAS
2024年第1期48-54,共7页
Journal of Xi’an Technological University
基金
陕西省(工业领域)重点研发计划(2019GY-079)
西安工业大学教学改革研究重点项目(22JGZ06)。
关键词
六边形网筒
变形转角
轴向应变
斜柱角度
hexagonal grid tube
deformation angle
axial strain
inclined angles of the columns
