基于环形张拉整体的索杆全张力穹顶结构形态分析

发布时间：2018-01-07 00:24

本文关键词：基于环形张拉整体的索杆全张力穹顶结构形态分析　出处：《工程力学》2015年S1期 　论文类型：期刊论文

【摘要】：运用平衡矩阵奇异值分解技术,通过变换经典半八面体张拉整体单元的几何构型,对半规则张拉整体单元进行了自平衡构型的找形分析,给出了几何变换后的设计公式,并通过单元自应力模态和机构位移模态验证了单元的几何稳定性。对此单元进行环向拼装,得到了环形张拉整体结构并给出结构整体可行预应力。提出了环形张拉整体中部引入葵花形索穹顶的构造方法,构建了全张力自平衡的新型索杆穹顶结构,并对其进行了静力分析,表明该结构具有较好的刚度。最后通过实物模型进一步验证了该结构体系的可行性。该研究对张拉整体在实际工程中的应用具有一定促进作用。
[Abstract]:By changing the geometric configuration of the classical semi-octahedron tensioning integral element, the self-equilibrium configuration of the semi-regular tensioning integral element is analyzed by using the balanced matrix singular value decomposition technique. The design formula after geometric transformation is given, and the geometric stability of the element is verified by the self-stress mode and the displacement mode of the mechanism. The element is assembled in a circumferential direction. The ring tensioning integral structure and the whole feasible prestress of the structure are obtained. The construction method of introducing sunflower cable dome into the middle part of the ring tensioning whole is put forward, and a new type of cable dome structure with full tension self-balance is constructed. The static analysis is carried out. It is shown that the structure has good stiffness. Finally, the feasibility of the structure system is further verified by the physical model. The research has a certain role in promoting the application of tensioning in practical engineering.
【作者单位】：东南大学混凝土与预应力混凝土教育部重点实验室;东南大学国家预应力工程技术研究中心;美国约翰霍普金斯大学土木工程系;
【基金】：国家自然科学基金项目(51208263,51008065,51308105) 东南大学优秀青年教师教学科研计划项目(中央高校基本科研业务费专项资金2242014R30005)
【分类号】：TU399
【正文快照】： 张拉整体是由一组离散的受压构件与一套连续受拉构件组成的稳定自平衡结构体系[1],最早由美国学者Fuller提出。该结构结构体系具有轻型、高效的特点,能最大限度发挥索张拉的优势。早期对张拉整体的研究多集中于建筑与艺术领域[2],很少涉及工程应用领域。自20世纪80年代起,张拉

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