【摘要】 针对索撑单层柱面木网壳结构，采用圆木代替传统钢构件并通过半刚性螺栓球节点连接杆件，通过对方头螺钉布置数量不同的两组共12个圆木构件-螺栓球节点进行抗转动试验及数值模拟研究节点的半刚性性能；并提出一种由面外索单元交错布置的面外布索方案，研究索撑单层圆木柱面网壳的静力稳定性能。结果表明，节点半刚性由截面的缩减以及端盘与圆木之间的连接所致，且截面缩减是节点半刚性的主要成因，试验和数值模拟所得到的节点弯矩-转角曲线相互吻合，所采用的节点数值模拟方法正确；索撑单层圆木柱面网壳结构有限元模型能够在10%误差以内模拟试验中结构的整体变形及节点的荷载-位移曲线，且采用该布索方案的结构承载力和刚度均大于采用已有布索方案的结构，结构承载力随矢跨比的增大先增大后减小，随预应力、撑杆高度、节点刚度的增大而增大，而随初始缺陷、活荷载与恒荷载比值的增大而减小。更多还原

【Abstract】 For the cable supported log cylindrical grid shell, this paper used logs instead of steel as structural members and introduced semi-rigid bolt-ball joints to connect them. Through the rotation tests and numerical simulations of two groups(12 in total) of KT-W joints with different numbers of lag screws, the semi-rigidity of this joint was studied. By staggering the out-of-plane cable units, this paper studied the static stability of the structure. The results indicate that the semi-rigidity of the joint comes from the reduction of the cross-section and the connection between the end-disc and log, and the first one is the main cause of the semi-rigidity, and the curves between bending moment and rotation obtained by the load test and numerical simulation are in good agreement, which verifies the correctness of the numerical simulation method. The structural finite element model was able to simulate the overall deformation of the structure and the load-displacement curves of the nodes in the experiment within an error of 10%, and the load-bearing capacity and stiffness of the structure with this cable supported scheme are larger than that of the structure with an existing cable supported scheme. The load-bearing capacity of the structure increases and then decreases with the increase of the rise-span ratio, increases with the increase of the prestresses, strut’s length, and the rigidity of the nodes, and decreases with the increase of the initial defects, and the ratio of the live load to the dead load.更多还原