独塔钢箱斜拉桥压重位置的优化研究

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英文篇名：Research on Optimization of Ballast Location of Single Tower Cable-stayed Bridge with Steel Box 中文刊名：兰州工业学院学报 英文刊名：Journal of Lanzhou Institute of Technology 作者：杨金烁 ; 李子奇 英文作者：YANG Jin-shuo ; LI Zi-qi ; College of Civil Engineering ; Lanzhou Jiaotong University 中文关键词：独塔斜拉桥 ; 压重位置 ; 辅助墩 ; 抗震性能 英文关键词：single tower cable-stayed bridge ; ballast location ; auxiliary pier ; seismic performance 出版日期：2015-06-15 机构：兰州交通大学土木工程学院; 年：2015 期：03 出版单位：兰州工业学院学报

摘要

以西北地区某独塔钢箱斜拉桥为例,首先分析了昼夜温差使北侧梁端翘对结构产生的不利影响;然后通过改变压重位置分别比较辅助墩、边墩、主塔及主梁的受力状态,选出最优方案;最后计算结构在地震荷载作用下的受力状态.研究结果表明,合理的压重位置能使主体结构受力状态均满足设计及规范要求,能为该桥后续施工提供可靠依据.
This paper uses a single tower cable-stayed bridge with steel box built on northwest region as an example. Firstly the reason of the tilt for the north side beam caused by the diurnal temperature difference was analyzed,and the necessity of ballast was illustrated. Then the stress state of the auxiliary pier,the side pier,the main tower and main beam were compared by changing the ballast's location and the optimal solution was selected. Finally the stress state under the seismic force was calculated. The results show that a reasonable ballast location can make the stress state of the main structure meet the design and specifications requirements,which provides a reliable basis for the subsequent construction of the bridge.

引文

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