摘要
为增大结构的安全储备并保证主梁受力合理,通常系杆拱桥施工中对吊杆采用2次张拉,使其达到设计成桥索力。该文以寒山大桥为例,提出了吊杆2次张拉的施张拉力、顺序的计算问题,以影响矩阵理论为基础,建立了2次张拉最优控制的数学模型,采用惩罚函数法求解,该方法计算精确、简便、实用,是一种较为理想的计算方法。
In order to improve the structure security and guarantee the girder appropriate force in the construction of tied-arch bridges, cables should be tensioned twice and then the expected completed cable can be achieved at last. A good method was proposed to calculate the cable tension forces and the adjusted order for Hanshan Bridge. Based on the theory of influence matrix, an optimized control model to solve the second cable adjustment was established, and method of penalty function was used. This method had many advantages, such as good solution, convenience and practice etc. So it is a imagining method of funiculus.
出处
《现代交通技术》
2011年第1期28-31,共4页
Modern Transportation Technology
关键词
桥梁工程
影响矩阵法
惩罚函数法
2次张拉
成桥索力
bridge engineering
influence matrix method
penalty function method
secondary tension
completed cable
