摘要
以某座不对称V型斜跨钢箱拱桥为工程背景,建立有限元模型,结合现有拱桥与斜拉桥合理成桥状况调索方法,采用刚性支承连续梁法、零位移法、刚性吊杆法和最小弯曲能量法这4种常规调索方法对此异型拱桥成桥吊杆索力进行初调,并采用影响矩阵法对索力进行优化,发现常规调索方法得到的成桥索力分布较不均匀,优化后能得到较为均匀的索力,并一定程度改善结构在成桥恒载状况下的变形及受力.考虑异型拱桥施工过程中吊杆张拉工序对结构受力的影响,采用4种不同的张拉工序,对比分析张拉过程中吊杆索力极值、主拱圈扭矩极值、平面内弯矩极值、平面外弯矩极值及平面外位移极值,发现采用方案一(即中间至两端错位张拉吊杆)为最合理的张拉工序,研究成果对异型拱桥的设计及施工均有一定的应用价值.
In this paper, an asymmetric V-shaped inclined span steel box arch bridge is used as the engineering background. By establishing a finite element model and referring to the existing arch bridges and cable-stayed bridges, four conventional adjustment methods, namely rigid support continuous beam method, zero displacement method, rigid boom method, and minimum bending energy method are used to make preliminary adjustments to the cable force of the approaching boom of the shaped arch bridge. The analysis results find that the cable force distribution obtained by the conventional adjustment methods is not uniform. After the optimization of cable force by the influence matrix method, the cable force is more uniform and the deformation and force of the structure under constant load are improved to a certain extent. Considering the influence of the tensioning sequence on the structure during the construction of the shaped arch bridge, the influence of four different tensioning sequences on the five extreme values of boom force, main arch ring torque, in-plane bending moment, out-of-plane bending moment, and out-of-plane displacement is analyzed. It is found that the most reasonable tensioning process is to use option 1, i.e. the tensioning of the boom is staggered from the middle to both ends. The research results have some application value to the design and construction of shaped arch bridges.
作者
郭鑫
袁晟
颜东煌
彭坤帅
GUO Xin;YUAN Sheng;YAN Donghuang;PENG Kunshuai(School of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China;Testing Consulting Co.,Ltd.,Changsha University of Science and Technology,Changsha 410076,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2022年第3期51-60,共10页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金资助项目(51878073,52078054)
湖南省交通科技项目资助(201932)
湖南省自然科学基金资助项目(2021jj30730)
湖南省研究生科研创新项目(CX20200832,CX201900650)。
关键词
V型斜跨拱圈
钢箱拱桥
斜吊杆
合理成桥状态
索力优化
V-shaped inclined span arch ring
steel box arch bridge
inclined suspende
reasonable completion state
cable force optimization
