肋环型劲性支撑穹顶结构静力性能研究

给出劲性支撑穹顶结构静力分析时的基本假设和非线性有限元方程。探讨劲性支撑穹顶结构索垂度的影响,对比分析该结构与索穹顶结构的静力性能,最后讨论初始预应力、跨度、矢高和环向等分数等参数对结构静力性能的影响。算例分析表明,索垂度对劲性支撑穹顶结构静力性能的影响可忽略不计。劲性支撑穹顶结构的整体刚度比索穹顶结构大,脊索的受力性能更能得到充分的发挥。

STUDY ON STATIC PERFORMANCE OF GEIGER RIGID BRACING DOME

Basic hypothesis and nonlinear finite element equations of static analysis for rigid bracing dome were given.The cable sag of rigid bracing dome was discussing,static characteristics of rigid bracing dome and cable dome were compared,the influence of structure's parameters(as initial prestress,span,rise,etc.) was discussed.Analysis of example demonstrated that the impact of cable sag could be negligible for rigid bracing dome,the whole stiffness of rigid bracing dome was greater than that of a cable dome,and the force behavior of ridge cable was in full play.