基于无应力状态法的自锚式悬索桥吊杆张拉方案  

The Method of Suspender Tension of Self-anchored Suspension Bridge Based on No-stress Status

作　　者：李盼到[1] 徐艳玲[1] 姜鹏[1] 

机构地区：[1]北京市市政工程设计研究总院,100082

出　　处：《特种结构》2012年第3期50-52,共3页Special Structures

摘　　要：由于自锚式悬索桥主梁需在主缆架设之前先连续为整体再支承于支架上,其吊杆的安装和张拉成为自锚式悬索桥施工控制的一个特点和难点。本文通过对吊杆张拉方法的研究,以及对洛阳市开拓大道跨伊河大桥吊杆张拉控制条件的分析,制定了基于无应力状态法的吊杆张拉方案。吊杆张拉采用无应力吊杆长度调整法,将复杂的非线性问题转化为了简单的吊杆无应力长度调整问题。本吊杆张拉方案不但精确实现了设计吊杆力,且施工周期短,施工投入小,施工控制容易。可为类似工程提供借鉴。Suspender erection and adjustment is the key step of construction control for the self-anchored suspension bridge.In this paper,through summarizing from present suspender construction methods and combining with engineering practice of Kaituo Bridge in LuoYang,a new suspender tension method based on no-stress status is presented. This method converts the nonlinear problem to the simply problem by adjusting the length of suspenders,makes the control of suspender tension calculatedly and easily,saves the investment and shorten the construction period.It would bring valuable references for design and construction of similar bridges.

关 键 词：自锚式悬索桥 吊杆张拉 无应力状态 非线性分析 施工控制 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]