塔梁分离式悬索桥抗震性能研究
发布时间：2018-08-29 14:26
【摘要】：塔梁分离式悬索桥是近年来新出现的一种悬索桥结构形式,为适应山区峡谷地形,减少山体开挖,使结构与地形环境和谐相容,将主梁支承于山体而非主塔上。这导致主梁长度小于主塔中心距离,并且缆索布置等也相应发生变化,从而引起结构力学特性相较于主梁支承于主塔的常规悬索桥发生一定程度的变化。湖南湘西矮寨大桥是国内外首座正式建成的塔梁分离式悬索桥,而在此之前,关于这种桥式的结构理论很少。近年来围绕塔梁分离式悬索桥学者们展开了细致的研究,包括其结构特性、地震易损性等方面。但关于这一桥式仍存在一些内容需要进一步分析补充。塔梁分离式悬索桥的动力特性与抗震性能可能会受三方面因素影响:塔梁分离的边界条件改变;吊跨比参数变化;地锚索设置。本文即以矮寨大桥为基础,研究以上三方面因素对结构抗震性能的影响规律,以期为今后类似的工程方案提供思路。主要研究内容包括:首先,介绍了悬索桥发展历史趋势与结构分析理论,总结了结构抗震分析的基本理论与悬索桥振动的有限元分析方法。着重阐述了其结构静力分析、动力分析、初始平衡状态分析与有限元求解等方面,为建模分析作理论准备。随后,基于有限元分析软件建立三组共九种不同结构设置的悬索桥空间有限元模型并分别进行模态分析与比较,通过总结各组模型的振动特性差异,得知地锚索设置等三方面因素对悬索桥动力特性的影响,也为后续的动力时程分析提供参考依据。最后,在理论与计算分析的基础上确定大质量,阻尼,地震波输入,塑性铰设置等相关时程分析条件后,分别对各模型进行纵桥向与横桥向、弹性与弹塑性动力时程分析。比较各模型的位移与内力响应,以此获得塔梁分离的边界条件改变、吊跨比参数变化、地锚索设置三方面因素对悬索桥结构抗震性能的影响的初步结论。
[Abstract]:Tower and beam separation suspension bridge is a new structure form of suspension bridge in recent years. In order to adapt to the mountain gorge topography, reduce the mountain excavation, make the structure compatible with the terrain environment, the main beam is supported on the mountain body instead of the main tower. As a result, the length of the main beam is smaller than the center distance of the main tower, and the cable arrangement changes accordingly, which results in the change of the structural mechanical properties compared with the conventional suspension bridge supported by the main tower to a certain extent. Hunan Western Hunan Paizhai Bridge is the first tower-beam suspension bridge built at home and abroad, but before this, there were few theories about the bridge structure. In recent years, researchers have carried out detailed studies on tower and beam separation suspension bridges, including their structural characteristics, seismic vulnerability and so on. However, there are still some contents about this bridge that need to be further analyzed and supplemented. The dynamic characteristics and seismic behavior of separated suspension bridges may be affected by three factors: the change of boundary conditions of tower and beam separation, the variation of the ratio of crane to span, and the installation of anchor cables. Based on the pai-zhai bridge, this paper studies the influence of the above three factors on the seismic performance of the structure in order to provide some ideas for similar projects in the future The main research contents are as follows: firstly, the development trend and structure analysis theory of suspension bridge are introduced, and the basic theory of seismic analysis and the finite element analysis method of suspension bridge vibration are summarized. The static analysis, the dynamic analysis, the initial equilibrium state analysis and the finite element solution of the structure are emphasized. The theoretical preparation for the modeling analysis is made. Then, based on the finite element analysis software, three groups of spatial finite element models of nine different structures of suspension bridges are established, and modal analysis and comparison are carried out respectively, and the differences of vibration characteristics of each group of models are summarized. The influence of three factors on the dynamic characteristics of the suspension bridge, such as the installation of the ground anchor cable, is known, which also provides a reference for the subsequent dynamic time history analysis. Finally, on the basis of theoretical and computational analysis, the related time-history analysis conditions such as large mass, damping, seismic wave input and plastic hinge setting are determined, and then the longitudinal and transverse bridge directions, elastic and elastoplastic dynamic time history analysis of each model are carried out respectively. By comparing the displacement and internal force responses of each model, the preliminary conclusions on the influence of three factors on the seismic behavior of suspension bridge structure are obtained, such as the change of boundary condition of tower and beam separation, the change of the ratio parameter of crane to span, and the setting of anchor cable on the suspension bridge structure.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55;U448.25
本文编号：2211476
[Abstract]:Tower and beam separation suspension bridge is a new structure form of suspension bridge in recent years. In order to adapt to the mountain gorge topography, reduce the mountain excavation, make the structure compatible with the terrain environment, the main beam is supported on the mountain body instead of the main tower. As a result, the length of the main beam is smaller than the center distance of the main tower, and the cable arrangement changes accordingly, which results in the change of the structural mechanical properties compared with the conventional suspension bridge supported by the main tower to a certain extent. Hunan Western Hunan Paizhai Bridge is the first tower-beam suspension bridge built at home and abroad, but before this, there were few theories about the bridge structure. In recent years, researchers have carried out detailed studies on tower and beam separation suspension bridges, including their structural characteristics, seismic vulnerability and so on. However, there are still some contents about this bridge that need to be further analyzed and supplemented. The dynamic characteristics and seismic behavior of separated suspension bridges may be affected by three factors: the change of boundary conditions of tower and beam separation, the variation of the ratio of crane to span, and the installation of anchor cables. Based on the pai-zhai bridge, this paper studies the influence of the above three factors on the seismic performance of the structure in order to provide some ideas for similar projects in the future The main research contents are as follows: firstly, the development trend and structure analysis theory of suspension bridge are introduced, and the basic theory of seismic analysis and the finite element analysis method of suspension bridge vibration are summarized. The static analysis, the dynamic analysis, the initial equilibrium state analysis and the finite element solution of the structure are emphasized. The theoretical preparation for the modeling analysis is made. Then, based on the finite element analysis software, three groups of spatial finite element models of nine different structures of suspension bridges are established, and modal analysis and comparison are carried out respectively, and the differences of vibration characteristics of each group of models are summarized. The influence of three factors on the dynamic characteristics of the suspension bridge, such as the installation of the ground anchor cable, is known, which also provides a reference for the subsequent dynamic time history analysis. Finally, on the basis of theoretical and computational analysis, the related time-history analysis conditions such as large mass, damping, seismic wave input and plastic hinge setting are determined, and then the longitudinal and transverse bridge directions, elastic and elastoplastic dynamic time history analysis of each model are carried out respectively. By comparing the displacement and internal force responses of each model, the preliminary conclusions on the influence of three factors on the seismic behavior of suspension bridge structure are obtained, such as the change of boundary condition of tower and beam separation, the change of the ratio parameter of crane to span, and the setting of anchor cable on the suspension bridge structure.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55;U448.25
【参考文献】
相关期刊论文 前10条
1 刘榕;胡建华;陈国平;刘汉彪;;湘西矮寨大桥塔-梁分离式悬索桥桥型结构研究[J];桥梁建设;2012年05期
2 苏生瑞;李松;郝莉莉;梅海;;汶川地震中小鱼洞大桥的变形破坏特征与机理[J];灾害学;2011年04期
3 周国良;李小军;刘必灯;亓兴军;;大质量法在多点激励分析中的应用、误差分析与改进[J];工程力学;2011年01期
4 马碧波;王良洪;沈锐利;;矮寨特大悬索桥地锚索的设计、影响与安装过程分析[J];中外公路;2010年06期
5 崔剑峰;胡建华;刘榕;;矮寨大桥总体结构静力分析[J];湖南交通科技;2008年02期
6 张树生;张显恩;;不同设计基准期地震动参数取值[J];工程建设;2007年05期
7 王涛,李瑞华;结构抗震设计理论的发展过程和方向[J];中国勘察设计;2005年05期
8 蔡健,周靖,禹奇才;建筑抗震设计理论研究进展[J];广州大学学报(自然科学版);2005年01期
9 周世忠;中国悬索桥的发展[J];桥梁建设;2003年05期
10 谢礼立,马玉宏;现代抗震设计理论的发展过程[J];国际地震动态;2003年10期
相关博士学位论文 前4条
1 宋旭明;大跨度自锚式悬索桥受力特性与极限承载力研究[D];中南大学;2009年
2 李杰;自锚式悬索桥地震非线性时程响应分析和简化方法研究[D];西南交通大学;2007年
3 赵岩;桥梁抗震的线性/非线性分析方法研究[D];大连理工大学;2003年
4 唐茂林;大跨度悬索桥空间几何非线性分析与软件开发[D];西南交通大学;2003年
相关硕士学位论文 前6条
1 董学智;峡谷地区带地锚索的少塔悬索桥地震响应研究[D];西南交通大学;2016年
2 郭福宽;中央扣对大跨度悬索桥抗震性能的影响研究[D];哈尔滨工业大学;2015年
3 刘汉彪;塔梁分离式悬索桥结构特性研究[D];湖南大学;2013年
4 余崇;矮寨大桥基于性能的地震易损性分析[D];湖南大学;2013年
5 李光军;大跨度悬索桥地震反应分析[D];中国地震局工程力学研究所;2012年
6 肖岱;大连金州湾二桥地震反应分析[D];大连理工大学;2008年
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