大跨径小矢跨比人行悬索桥力学性能分析研究
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摘要
人行悬索桥相比公路悬索桥而言,桥面宽度较窄,结构整体刚度小,属于大跨径柔性结构。国内外大多数悬索桥的矢跨比都在1/12～1/9之间,人行悬索桥考虑到景观效果要求,因此可能设计成小矢跨比悬索桥。为了研究小矢跨比人行悬索桥的受力性能,该文以1/16小矢跨比景区大跨径人行悬索桥为研究对象,通过美国大型通用高级非线性有限元软件MSC.Marc建立了主跨416m人行悬索桥三维空间有限元分析模型,研究了小矢跨比下人行悬索桥结构受力性能。分析结果表明,小矢跨比人行悬索桥在一定程度上影响结构整体刚度的变化,得出在不同荷载作用效应下结构受力性能规律,并且在景区修建小矢跨比人行悬索桥是可行的,研究结论可为柔性人行悬索桥的合理设计提供一定参考依据。
Compared with the highway suspension bridge, the pedestrian suspension bridge has a narrow bridge deck and small overall structural rigidity,and it is a large-span flexible structure. The rise-span ratio of most suspension bridges at home and abroad is between 1/12 and 1/9. The pedestrian suspension bridge takes into account the requirements of the landscape effect, so it may be designed to be a small rise-span ratio suspension bridge. In order to study the mechanical properties of the small-span ratio pedestrian suspension bridge,this paper takes the 1/16 large-span pedestrian suspension bridge with small-span ratio in a scenic spot as the research object, the three-dimensional finite element analysis model of the pedestrian suspension bridge with the main span of 416m was established by the large-scale general nonlinear finite element software MSC.Marc in the United States, and the structural performance of the pedestrian suspension bridge under the small rise-span ratio is also studied. The analysis results show that the small risespan ratio pedestrian suspension bridge affects the change of the overall stiffness of the structure to some extent, and the structural stress behavior under different load effects is obtained. It is feasible to construct the small-span ratio pedestrian suspension bridge in the scenic spot. It provides a reference for the rational design of flexible pedestrian suspension bridges.
Compared with the highway suspension bridge, the pedestrian suspension bridge has a narrow bridge deck and small overall structural rigidity,and it is a large-span flexible structure. The rise-span ratio of most suspension bridges at home and abroad is between 1/12 and 1/9. The pedestrian suspension bridge takes into account the requirements of the landscape effect, so it may be designed to be a small rise-span ratio suspension bridge. In order to study the mechanical properties of the small-span ratio pedestrian suspension bridge,this paper takes the 1/16 large-span pedestrian suspension bridge with small-span ratio in a scenic spot as the research object, the three-dimensional finite element analysis model of the pedestrian suspension bridge with the main span of 416m was established by the large-scale general nonlinear finite element software MSC.Marc in the United States, and the structural performance of the pedestrian suspension bridge under the small rise-span ratio is also studied. The analysis results show that the small risespan ratio pedestrian suspension bridge affects the change of the overall stiffness of the structure to some extent, and the structural stress behavior under different load effects is obtained. It is feasible to construct the small-span ratio pedestrian suspension bridge in the scenic spot. It provides a reference for the rational design of flexible pedestrian suspension bridges.
引文
[1]JGT/D65-05-2015公路悬索桥设计规范[S].北京:人民交通出版社股份有限公司,2015.
[2]周绪红,武隽,狄谨.大跨径自锚式悬索桥受力分析[J].土木工程学报,2006(2):43-65.
[3]唐茂林,宋晖,林恰,等.矢跨比对悬索桥受力的影响分析[J].建筑科学与工程学报,2010(3):24-28.
[4]江南,沈锐利.矢跨比对悬索桥结构刚度的影响[J].土木工程学报,2013(7):90-97.
[5]王浩,李爱群,杨玉冬,等.中央扣对大跨径悬索桥动力特性的影响研究[J].中国公路学报,2006(6):49-53.
[6]孙胜江,刘书伟.特大跨悬索桥动力特性及参数分析[J].公路,2007(11):41-45.
[7]万田保.张家界大峡谷异型玻璃悬索桥设计关键技术[J].桥梁建设,2017(1):6-11.
[8]陈火红,杨剑,薛小香,等.新编Marc有限元实例教程[M].北京:机械工业出版社,2007:66-68.
[2]周绪红,武隽,狄谨.大跨径自锚式悬索桥受力分析[J].土木工程学报,2006(2):43-65.
[3]唐茂林,宋晖,林恰,等.矢跨比对悬索桥受力的影响分析[J].建筑科学与工程学报,2010(3):24-28.
[4]江南,沈锐利.矢跨比对悬索桥结构刚度的影响[J].土木工程学报,2013(7):90-97.
[5]王浩,李爱群,杨玉冬,等.中央扣对大跨径悬索桥动力特性的影响研究[J].中国公路学报,2006(6):49-53.
[6]孙胜江,刘书伟.特大跨悬索桥动力特性及参数分析[J].公路,2007(11):41-45.
[7]万田保.张家界大峡谷异型玻璃悬索桥设计关键技术[J].桥梁建设,2017(1):6-11.
[8]陈火红,杨剑,薛小香,等.新编Marc有限元实例教程[M].北京:机械工业出版社,2007:66-68.