【作者】 孙旭光；

【导师】 罗尧治；

【作者基本信息】 浙江大学 ， 结构工程， 2005， 硕士

【摘要】 随着我国国民经济快速发展，北京奥运会和上海世博会申办成功以及国家大力鼓励建筑用钢，大型和超大型空间结构将会得到广泛应用。迫切需要施工技术、分析手段的创新。然而，由于大型空间结构体系复杂，施工中影响结构受力的因素众多而又相互关联，施工全过程力学分析具有相当的难度，目前缺乏系统的研究。 本文以网壳结构的滑移法施工为研究对象，在总结了滑移法施工分类、特点、工艺和相关技术问题的基础上，把有限元方法的生死单元技术应用到网壳结构滑移施工的全过程分析中，通过简单算例验证其用于施工分析的可行性。 按理想施工条件，对一个120m跨度大型柱面网壳结构累积滑移施工进行了施工全过程分析，并与近似验算法的分析结果、施工荷载工况下的计算值比较，分析了非线性因素对施工分析结果的影响，研究了滑移单元划分方式和牵引点设置方式等施工工艺对结构成形后受力状态的影响。 采用先进的光纤布拉格光栅传感系统，对新乡电厂预应力柱面网壳干煤棚累积滑移施工进行了全过程监测。一方面通过准分布方式对施工中的结构受力的进行全程监控确保工程安全施工：另一方面记录各个施工阶段结构的受力和变形，并与生死单元法施工全过程分析结果比较，同时对滑移过程中的附加内力、滑移中异常的现象进行了分析。 论文最后对上述研究内容及成果作了进一步的总结，提出了进一步工作中需要解决的若干其他关键问题。更多还原

【Abstract】 Long-span spatial structures will be widely used with development of national economy, success of bidding for the Beijing 2008 Olympics and the Shanghai 2010 world exposition, consumption of structural steel is advocated by the government. It’s critical to research new construction technology and analytic methods. While, it is difficult to simulate the whole erection process for the structure system of long-span spatial structure is complicated, and it has many factors to affect the structure mechanics during the erection process.As a research object, the classifications, characteristics, procedure and relevant technical issues of sliding construction are summarized. The birth and death elements of FEA is used to simulate the whole erection process, and it was verified by a simple example.The whole accumulative sliding construction process of a long-span reticulated shells with span of 120 meter is computed by method of birth and death elements. The results of approximate method and the calculation results under construction load were compared. The non-linearity effect to construction analysis is studied, and effects to finishing structure mechanics by division of sliding element and amount of sliding rail were also studied.The whole accumulative sliding construction process of prestressed cylindrical reticulated shells coal storage of xinxing’s power plant was monitored by fiber bragg grating sensor system.On the one hand, ,in order to ensure construction security, the structure mechanics during the whole erection process was monitored by quasi-distributed method; on the other hand, the deforms and mechanics of every construction stage was recorded and comparing to calculation results by method of birth and death elements. The additional force and abnormity of sliding process were also analyzed.At last, after summarizing the result of this paper, the future research work was presented.更多还原