【作者】 张小龙；

【导师】 石磊；

【作者基本信息】 大连理工大学 ， 桥梁与隧道工程， 2012， 硕士

【摘要】 自锚式悬索桥因为其独特的优点而越来越受到广大人民的青睐,但是由于其施工工序与一般悬索桥不同。为了更好建设这种独特桥型,广大工程师积极进行研究,尝试各种施工控制控制方法,既保证质量,又能安全,经济,缩减工期。本文以目前世界上跨径最大的混凝土自锚式悬索桥庄河建设大街东桥施工中的数据为依据,研究自锚式悬索桥施工控制的理论和方法,具体内容如下：(1)采用非线性有限元为主,解析法为辅的方法,分析了主缆在吊索张拉不同阶段的内力及线形的变化。(2)研究了基于抛物线理论的主缆垂度与索长、跨度、温度之间的关系。根据调索之前测得的结构参数,求出中跨及边跨的调索公式,并将求得的调索公式运用到基准索股的架设中。(3)提出了部分前进交替张拉法。该方法是在前进交替张拉法的基础上,结合张拉条件及主缆线形,灵活掌握吊索是一次张拉到位还是交替张拉。该方法的优点是：兼顾结构受力及工期,使综合效率大幅提高。(4)吊索张拉过程本桥施工重点。由于本桥吊索根数较多,为了寻找较优方案,对一些影响张拉的因素进行探讨分析,并将该方法应用到实际桥梁的施工监控中。更多还原

【Abstract】 The self-anchored suspension bridge is getting more and more favour of the people because of its unique advantages, but because its construction process is different from general suspension bridges. In order to better construct this unique construction of bridge, the engineers positively try all kinds of construction control methods, not only ensure quality and safety, save economy, cut period. This paper is based on the world’s largest span concrete self-anchored suspension bridge-Zhuanghe Jianshe street east bridge’s construction data,studying construction control theory and method, the content as follows:(1) Use nonlinear finite element, supplemented by the analytical method, and analyses the methods of the main cable tension in different stages of the internal force and linear change.(2) The relationships based on the parabola theory between cable sag and cable length、 span length、 temperature have been studied. The formula of side and middle span cable adjustment is find out according to structure parameters measured before the work of cable tension adjustment.The formula is used to adjust datum strand sag.(3) Put forward partial alternately tensioning method. This method is in advance of the basis of alternately tensioning method, combined with tension condition and main cable form, flexible sling is a tension in place or alternate tension. The advantage of the method is:give consideration to the structure stress and time limit, make the comprehensive efficiency greatly improved.(4) The sling tension process is this bridge construction key. Because this bridge sling the number is many, in order to find a best plan, some influence factors of tension are discussed, and the method was successfully used to the actual bridge construction control.更多还原