基于节点刚度的柱面巨型网格结构静力性能研究

发布时间：2018-04-11 00:02

本文选题：柱面巨型网格 + 节点刚度　；参考：《西安建筑科技大学学报(自然科学版)》2014年05期

【摘要】：建立半刚性节点柱面巨型网格结构数值分析模型,考虑几何非线性和初始缺陷的影响,分别研究节点轴向半刚性、弯曲半刚性及双半刚性结构的静力性能,还提出了双半刚性节点研究的不断逼近计算方法.结果表明:只考虑节点轴向刚度时,若其增加,静力稳定承载力随之增大;只考虑节点弯曲刚度时,静力稳定承载力变化较小;两者同时考虑时,结构承载力较只考虑轴向刚度时明显降低,可见节点的轴向刚度和弯曲刚度叠加效应明显.进而考虑此叠加效应,研究了焊接球节点结构的静力性能,发现节点刚度变化会引起结构内力与位移的显著变化,可见实际工程中节点半刚性的影响不能忽视.
[Abstract]:A numerical analysis model of cylindrical mega grid structure with semi-rigid joints is established. Considering the influence of geometric nonlinearity and initial defects, the static behavior of axial semi-rigid, bending semi-rigid and double-semi-rigid structures is studied respectively.A method of continuous approximation for the study of double semi-rigid joints is also presented.The results show that when the axial stiffness of the joint is considered only, the static stability bearing capacity increases if it is increased; when the bending stiffness of the joint is considered only, the change of the static stability bearing capacity is small;The bearing capacity of the structure is obviously reduced when only axial stiffness is considered, and the superposition effect of axial stiffness and bending stiffness is obvious.Considering the superposition effect, the static behavior of welded spherical joint structure is studied. It is found that the change of joint stiffness will cause significant changes in internal force and displacement of the structure, so the effect of joint semi-rigidity can not be ignored in practical engineering.
【作者单位】：西安建筑科技大学土木工程学院;西安山鼎建筑工程设计咨询有限公司;中国建筑西北设计研究院;
【基金】：陕西省教育厅基金项目(12JK0910) 西安建筑科技大学科研基金项目(JC1002) 西安建大钢结构创新团队资助计划
【分类号】：TU399;TU311.1

【参考文献】