半刚性节点对单层球面网壳的影响

单层球面网壳作为网壳结构的一种常见形式,对研究网壳结构有着重要意义。随着计算机的普遍应用,模拟并研究节点半刚性已经成为可能。典型算例结果表明,NIDA程序可以准确考虑各种缺陷和设计参数对钢结构稳定承载力的影响。文章主要利用NIDA软件,在模拟节点不同刚度的情况下,研究半刚性节点对于单层球面网壳位移,内力的影响,对刚度进行静力分析。最后对单层网壳的稳定性进行部分深入研究,全面探究半刚性节点对单层球面网壳性能的影响。从而揭示一阶效应在网壳研究中的弊端,而应该采用二阶效应的研究方法,为今后单层球面网壳的进一步研究提供参考。

Effect of Semi-rigid Joints on the Single-layer Spherical Reticulated Shell

As a common form of reticulated shell structure, the study of lattice shell structures have significant implications. With the general application of computer, simulation and study on nodes of semi-rigid joints had become possible. A typical example showed that NIDA program can accurately take into account various defects and effects of design parameters on stability bearing capacity of steel structures. Simulating nodes of different stiffness of cases, this paper mainly uses NIDA software to study the influence of the semi- rigid joints on displacement in and internal force in single-layer spherical reticulated shell . Then there is a further study of semi rigid joint for single layer spherical lattice shell in different Vector-span ratio. To fully explore the semi-rigid joints on the performance of slngle-layer spherical reticulated shell effect, reveals the first-order effect on malpractice in the shell research and research methods for second order effects should be used. For future reference for the further study of single-layer spherical reticulated shells.