【摘要】 弦支穹顶结构体系作为一种新颖的结构形式,同单层网壳相比,具有更高的刚度和稳定性;同索穹顶相比,施工过程更加简单和容易控制。本文对一40m跨的Kiewitt型弦支穹顶结构,采用非线性有限元方法对影响稳定承载力的参数,如撑杆高度、拉索截面积、拉索预应力、拉索周数等进行了分析,得出了一些对工程设计有意义的结论。更多还原

【Abstract】 As one new type structural form, a suspen dome can not only improve effectively the global stiffness and stability of single layer dome, but also make the control of construction process much more easier. The behavior of the suspen dome is theoretically investigated by employing a nonlinear finite element method in this study. Structural par ameters of the suspen dome, such as heights of struts, sectional areas of cables, prestresses of cables, the number of cable rings, which influence the structural ultimate load carrying capacity, have been analyzed by employing a computational model of the Kiewitt suspen dome of 40m span. Some valuable conclusions are drawn for practical design.更多还原