| 斜拉桥施工阶段二次调索计算方法 |
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| 引用本文： | 任志刚,刘为俊,杜小勇,徐鹏,卢哲安.斜拉桥施工阶段二次调索计算方法[J].桥梁建设,2011(3). |
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| 作者姓名： | 任志刚 刘为俊 杜小勇 徐鹏 卢哲安 |
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| 作者单位： | 1. 武汉理工大学土木工程与建筑学院,湖北武汉,430070
2. 河南中建基础设施开发有限公司,河南周口,466000 |
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| 摘 要： | 为保证施工阶段的结构安全,一些斜拉桥的施工需要进行2次分步张拉斜拉索,而由于二次调索控制目标不同,需要采用不同的调索计算方法。针对施工期间存在2种阶段控制目标的斜拉桥,以主梁脱离支架和内力分布合理作为控制目标,采用以梁塔拉压及弯曲应变能最小为约束条件的最小能量法进行初张力优化计算,以设计成桥索力作为控制目标,采用差值法进行正装迭代计算确定第2次张拉索力,并结合工程实例,利用有限元法实现了二次张拉索力计算。2种方法组合使用所确定的施工张拉索力能够满足施工控制要求,最终成桥状态亦达到设计要求。
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| 关 键 词： | 斜拉桥 二次张拉 最小能量法 差值法 有限元法 |
Calculation Methods of Two-Time Cable Force Adjustment for Cable-Stayed Bridges at Construction Stage |
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| REN Zhi-gang,LIU Wei-jun,DU Xiao-yong,XU Peng,LU Zhe-an.Calculation Methods of Two-Time Cable Force Adjustment for Cable-Stayed Bridges at Construction Stage[J].Bridge Construction,2011(3). |
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| Authors: | REN Zhi-gang LIU Wei-jun DU Xiao-yong XU Peng LU Zhe-an |
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| Institution: | REN Zhi-gang1,LIU Wei-jun1,DU Xiao-yong2,XU Peng2,LU Zhe-an1(1.School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China,2.China Construction(Henan) Infrastructure Development Co.,Ltd.,Zhoukou 466000,China) |
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| Abstract: | To ensure the structural safety at construction stage,the stay cables of some cable-stayed bredges need to be tensioned in steps in two times in construction.Because the control targets of the cable force adjustment in two times are different,the different calculation methods for the cable force adjustment should be applied.In view of a cable-stayed bridge having two-time control targets in the process of construction,firstly the divorcing of the main girder of the bridge from scaffolding and the rational d... |
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| Keywords: | cable-stayed bridge two-time tensioning minimum energy method difference value method finite element method |
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