【作者】 何颖文；

【导师】 颜东煌；

【作者基本信息】 长沙理工大学 ， 桥梁与隧道工程， 2005， 硕士

【摘要】 无背索斜塔斜拉桥是一种结构体系新颖的斜拉桥,它最大的特点是利用倾斜索塔的自重而不是背索索力来平衡主跨主梁的自重。目前该桥型的桥梁修建少,本文对其施工和设计中将遇到的一些关键性问题进行较系统的研究,将有利于该桥型的进一步发展。本文以长沙市浏阳河洪山大桥为工程背景进行无背索斜塔斜拉桥合理施工状态确定、参数分析、施工监测的研究。主要工作如下: 1,本文应用正装迭代计算长沙洪山大桥这种无背索竖琴式斜塔斜拉桥,对其两种施工方案进行仿真计算,得到较为合理的方案,以合理的方案作为施工控制的理论基础。2,由于无背索竖琴式斜塔斜拉桥的参数对整个施工过程和成桥状态的影响目前研究较少,所以本文就关于结构自重,刚度,收缩徐变对结构在施工过程和成桥状态的影响进行分析,塔的倾角在斜塔斜拉桥中是一个重要的参数,就其对成桥状态结构的影响进行了分析。3,长沙洪山大桥结构新颖、技术复杂,这样的桥型施工控制在国内几乎没有同类型桥可以借鉴,本文介绍了洪山大桥施工控制的基本情况及控制效果,控制特点。更多还原

【Abstract】 No back-stays & inclined pylon cable-stayed bridge is a new cable-stayed bridge style. It is the specialty of this style bridge that substitutes the deadweight of inclined pylon for the back stays force to counteract the girder deadweight of main-span. At present, this type bridges are few. So more systematic researches for some crucial problems that will be met in its construction and design, will be helpful for the development of this bridge type. In this paper, some studies on the determining of reasonable construction state, parameter analysis and construction controlling of no back-stays & inclined pylon cable-stayed bridge are carried out based on the Hongshan Bridge, Changsha, Hunan Province, China. 1,This text calculates No back-stays sharp-shaped inclined pylon cable-stayed bridge of Changsha Hongshan Bridge with forward-iteration method, carries on emulation calculation for its two kinds of construction schemes, gets the comparatively rational scheme, and takes rational scheme as the theoretical foundation of construction controlling. 2, Because it is studied less at present about how the parameters which account for No back-stays sharp-shaped inclined pylon cable-stayed bridge effect on whole construction course and completed bridge state, so this text conducts dead-weight of structure, rigidity, and shrinking creep to analyze whose effects on the structure in construction course and completed bridge state. The inclination of the tower is an important parameter in the cable-stayed bridge of leaning tower, so whose effects on completed bridge state structure are analyzed. 3, Changsha Hongshan Bridge is novel in structure and complicate in technology, and such construction controlling of this type is almost unable to draw lessons from other same type bridges at home. This text introduces the basic situation, controlling results and controlling characters of Hongshan Bridge.更多还原