【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.更多还原

【Abstract】 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.更多还原