混凝土独塔斜拉桥的换索施工控制与加固效果分析  

Construction Control and Reinforcement Effect Evaluation of Cable Replacement for Concrete Single-tower Cable-stayed Bridge

作　　者：马赟 陶小委 宋粉丽 金世欣 MA Yun;TAO Xiaowei;SONG Fenli;JIN Shixin(Henan Transporation Research Institute Co.,Ltd.,Zhengzhou Henan 450015;Huanghe Jiaotong University,Jiaozuo Henan 454950)

机构地区：[1]河南省交通科学技术研究院有限公司,河南郑州450015 [2]黄河交通学院,河南焦作454950

出　　处：《河南科技》2019年第35期112-116,共5页Henan Science and Technology

摘　　要：为了保证某混凝土斜拉桥的结构安全和正常使用,本研究在试验检测和有限元计算分析的基础上制定了加固方案,并在斜拉索更换施工中对斜拉索索力、主梁位移、主塔偏位等关键指标进行施工控制。同时,结合施工控制结果和加固前、后荷载试验对比,对桥梁加固效果进行分析。结果表明,换索施工过程控制良好,加固后结构受力得到改善,桥梁承载能力、整体抗弯刚度有明显提高,结构安全储备有所增加。In order to ensure the structural safety and normal use of a concrete cable-stayed bridge, a reinforcement scheme was developed on the basis of test detection and finite element calculation analysis in this study, during the replacement of stay cables, key indicators such as cable force, displacement of the main beam, and deviation of the main tower were subject to construction control. At the same time, combining the results of construction control and the comparison of load test before and after reinforcement, the effect of bridge reinforcement is analyzed. The results show that the cable replacement construction process is well controlled, the structure is strengthened after reinforcement, the bearing capacity and overall bending stiffness of the bridge are significantly improved, and the structural safety reserve is increased.

关 键 词：斜拉桥 换索 加固 施工控制 荷载试验 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]