自锚式悬索桥体系转换施工控制研究  

Construction Control in System Transformation for the Self-anchored Suspension Bridge

作　　者：杨继承[1] 张钤 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]重庆市綦江区公路局,重庆401420

出　　处：《重庆交通大学学报（自然科学版）》2016年第1期5-9,116,共6页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：自锚式悬索桥体系转换过程几何非线性突出,吊索索力相互影响,仿真分析存在诸多困难,但吊索的无应力长度仅在张拉时发生改变,不随荷载的变化而变化,依此规律提出了吊索张拉的无应力状态数值模拟方法。根据某自锚式悬索桥的特点,在系统总结体系转换控制条件的基础上,详细探讨了可能的吊索张拉方案,重点对其中的3套典型方案采用无应力状态法进行了数值模拟,综合比较并给出了推荐方案。该自锚式悬索桥按照推荐方案的施工步骤完成了吊索张拉,全过程施工控制精度高,较好的达到了预期目标。Numerical simulation of self-anchored suspension bridge system transformation faces many difficulties owning to the geometric-nonlinear prominence and mutual influence of hanger force. According to the rule that the hangers＇ zero-stress length only changes with the hanger tension and not changes with the load,the numerical simulation method of stress-free status for hanger tension is put forward. According to the characteristics of a self-anchored suspension bridge,several possible hanger tension schemes were investigated in detail on the basis of the control conditions in system transformation. Three typical schemes of them were primarily simulated with the stress-free status method,and the recommended scheme after the comprehensive comparison was given. The self-anchored suspension bridge＇s hanger tension was carried out under the guide of the recommended scheme,whose construction control was with high accuracy and reached the expected goal.

关 键 词：桥梁工程 自锚式悬索桥 吊索张拉 无应力状态法 数值模拟 张拉控制条件 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]