建筑结构学报2023，Vol.44Issue(12)：72-81,10.DOI:10.14006/j.jzjgxb.2022.0679
K6型单层球面木网壳整体稳定性能研究
Research on global stability of K6-type single-layer spherical timber reticulated shells
摘要
Abstract
To study the global stability of K6-type single-layer spherical timber reticulated shell structures with semi-rigid joints,the slip stiffness and the bearing capacity for bolted fasteners were calculated according to formulas in the Eurocode EN 1995-1-1,and the simplified bending moment-rotation curves of slotted-in plate joints which are commonly used in practical engineering were determined.The bending semi-rigidity characteristics of the joints were simulated by the nonlinear spring element COMBIN39 in ANSYS software.The effects of different parameters on first-order linear buckling coefficient,elastic and elasto-plastic ultimate bearing capacity factors considering initial defects and plastic reduction factor were analyzed.The results of single-variable parameter analysis show that height-span ratio,span,section size and initial defect have great influence on the stability bearing capacity,and the arrangement of joint fasteners reduce the variation range of the joint stiffness which limits the influence of the semi-rigidity of joints.By 6 480 calculation cases with varying parameters,the plastic reduction factors under different height-span ratios and joint stiffness reduction factors are calculated,and results show that all the values of plastic reduction factors are smaller than 0.47 which is the recommended value of the steel reticulated shell specification.关键词
单层球面木网壳/有限元分析/半刚性节点/塑性折减系数/整体稳定性Key words
single-layer spherical timber reticulated shell/finite element analysis/semi-rigid joint/plasticity reduction factor/global stability分类
建筑与水利引用本文复制引用
欧加加,陈迪,龙卫国,何敏娟,刘宜丰..K6型单层球面木网壳整体稳定性能研究[J].建筑结构学报,2023,44(12):72-81,10.基金项目
中建股份科技研发课题(CSCEC-2021-Z-40),中建西南院科技研发计划(R-2022-64-S-Y-2023). （CSCEC-2021-Z-40）
