考虑舒适度涌溪人行玻璃悬索桥设计研究

发布时间：2019-06-17 14:24

【摘要】：简易人行悬索桥以其外形美观、构造简单、受力明确、造价低的特点获得青睐。它对地质地形的适应能力特别强,高强钢丝绳抗拉强度大的特点被充分利用,不在需要修建高的索塔,就可以架设大跨度的桥梁。人行悬索桥有着很好的应用前景,因此在山区及旅游景点常常采用这种桥型。本论文首先介绍了人行悬索桥现有研究的成果,然后阐述悬索桥的通用的基本计算理论,有限元法,舒适度评价方法以及优化设计理论的基本知识,随后使用ANSYS中APDL的参数化设计语言对本次工程涌溪人行玻璃索桥开始有限元建模,基于模型对悬索桥进行静动力分析。本论文以涌溪人行玻璃悬索桥作为工程背景,在规范内改变一些影响人行悬索桥受力特性的重要参数,比如:主缆的矢跨比,吊杆间距,跨度比,宽跨比,玻璃的尺寸等参数,比较和分析静力和动力计算结果,来全面研究人行玻璃悬索桥的受力特性,研究总结这种人行索桥的一些力学特性,以便用于指导工程实践。分析钢筋混凝土、玻璃、钢板材料的优缺点。基于瑞士和英国规范分析涌溪索桥舒适度是否合格。利用ANSYS软件非线性有限元分析功能和优化设计功能,采用合理的优化手段对本次工程进行优化,以悬索桥主梁变形最小为目标函数。首先利用零阶方法,然后基于零阶方法后采用一阶方法,从而得到更精确的结果。利用有限元软件计算分析,将优化后的结果进行对比分析,包括静力分析、动力分析,舒适度分析,从而使悬索桥达到一个稳定舒适的状态。
[Abstract]:Simple pedestrian suspension bridge is favored by its beautiful appearance, simple structure, clear force and low cost. Its adaptability to geological topography is particularly strong, and the characteristics of high strength wire rope tensile strength are fully utilized. Long-span bridges can be built without the need to build high cable towers. Pedestrian suspension bridge has a good application prospect, so it is often used in mountain areas and tourist attractions. This paper first introduces the existing research results of pedestrian suspension bridge, then expounds the general basic calculation theory, finite element method, comfort evaluation method and the basic knowledge of optimization design theory of suspension bridge, and then uses the parametric design language of APDL in ANSYS to model the Yongxi pedestrian glass cable bridge, and then carries on the static and dynamic analysis to the suspension bridge based on the model. In this paper, taking the Yongxi pedestrian glass suspension bridge as the engineering background, some important parameters that affect the mechanical characteristics of the pedestrian suspension bridge are changed in the code, such as the rise-span ratio of the main cable, the span ratio, the glass size and so on, to compare and analyze the static and dynamic calculation results, to comprehensively study the mechanical characteristics of the pedestrian glass suspension bridge, and to study and summarize some mechanical properties of the pedestrian suspension bridge. In order to guide engineering practice. The advantages and disadvantages of reinforced concrete, glass and steel plate materials are analyzed. Based on Swiss and British codes, the comfort of Yongxi cable bridge is analyzed. Based on the nonlinear finite element analysis function and optimization design function of ANSYS software, the reasonable optimization method is used to optimize the project, and the minimum deformation of the main beam of suspension bridge is taken as the objective function. Firstly, the zero-order method is used, and then the first-order method is adopted based on the zero-order method, and more accurate results are obtained. By using finite element software, the optimized results are compared and analyzed, including static analysis, dynamic analysis and comfort analysis, so that the suspension bridge can reach a stable and comfortable state.
【学位授予单位】：福建农林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U448.25

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