确定系杆拱桥吊杆初始张拉力方案及施工控制  

The method of computing initial stretching force of the hanger of tied arch bridge and construction control

作　　者：江旭东 

机构地区：[1]上海市城市投资公司路桥事业部

出　　处：《上海公路》2008年第1期37-39,共3页Shanghai Highways

摘　　要：利用力学的平衡条件,推导出一种以系杆拱桥的系杆为相应刚性支承连续梁弯矩为目标控制量的吊杆钢束初始张拉力的确定方法,同时考虑整体结构与预应力钢筋的作用。利用得到的目标控制量,实现在每一施工阶段或在确定的某一状态下对吊杆的张拉。得到吊杆与阶段张拉的施工控制程序,该程序使施工张拉过程简单明确,能较为准确地使系杆达到期望的内力状态和合适的线形要求,最终使成桥状态达到满意的结果,为大跨径系杆拱桥的设计与施工提供一种参考方法。Based on the basic concept of mechanics,considering the function of integral structure and prestressing steelbar,the method to determine the initial stretching force of the hanger corresponds to the reaction force of rigidly supported continous beam(target controlled quantity)was derivated According to the target controlled quantity,each construction stage and each static of hanger can be strengthed correctly.The stretching control procedure was proposed which was easy and correct for engineering in practice,for it can help to gain the right stress static and good linetype.The result can be referred to design and construction of large span tied arch bridges.

关 键 词：系杆拱桥 吊杆 张拉力 施工控制 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U445.4[交通运输工程—道路与铁道工程]