【作者】 王欣；

【导师】 关富玲；

【作者基本信息】 浙江大学 ， 建筑与土木工程， 2006， 硕士

【摘要】 膜结构的设计、分析过程大致可以分为三个阶段。第一阶段是找形设计阶段,即满足索膜初始张力平衡条件,同时接近设计者预想的曲面形状的求解过程;第二阶段是荷载分析阶段,即由初始形态设计的曲面形式,在各种外荷载作用下,求解其变形、索膜内力的过程;第三个阶段是裁剪分析阶段,即生成平面膜材的裁剪下料图。 本文首先对膜结构找形和荷载分析中的非线形有限元理论进行了推导,用相应的软件验算了一些经典算例。 接着构造简单而经典的膜结构的模型,模拟在施工张拉和工作状态下发生的支座位移,分析其在预应力损失,应力增大和松弛等方面对索膜结构的影响。 最后针对分析的理论结果,将它应用到膜结构的工程实践中,主要从膜结构的锚固基础设计、节点设计及施工安装等方面进行了论述。对如何防止出现较大位移以及对出现较大位移后的补救措施从多方面提出了一些建设性的意见。更多还原

【Abstract】 The whole procedure of cable and membrane structures’ analysis is composed of three parts. The first one is form-finding analysis. The aim of this part it is to find a satisfying tensioned surface under the equilibrium between cable force and membrane stress. The second is loading analysis. Based on the found form, it is expected to get the strain and stress of cable and membrane structures under the loads. The last one is cutting pattern analysis, which generated the number of membrane block and the cutting method.In this paper, finite elemen method of form-finding and loading analysis are derived, visual FEM programes verified by some classic strutre model.Secondary, with a simple and classic membrane structure model, the effects of foundation displacement on the upper membrane structure are analysed. Emphases are put on the prestress loss in membrane structures and membrane element’s stress accretion and stress reductions.In order to put the results of theoretics analysis into the engineering practice, the auther discusses the anchor foundation design、 details design、 erection and so on. Finally presents some methords how to reduce the displacement and constructive suggestoions to remedial measure .更多还原