摘要
钢管拱肋空管的吊装是钢管混凝土拱桥各个施工工序中最为关键的工序 ,它影响着钢管混凝土拱桥成拱时的线形质量。通过对三峡库区青干河大桥的监测监控实践和有限元分析程序 ,就钢管拱肋的吊装过程进行静力逆分析 ,计算扣索索力的变化规律 ,再运用遗传算法优化方法 ,寻找在各个拱肋空管吊装施工过程中能满足施工预拱度的索力值 。
Of the various construction procedures, the most crucial one is the hoisting of steel tube arch ribs, which affect the curve quality in the arching process. After that, the paper makes a static inverse analysis of the cable-hoisting construction via monitoring the Qingan River Bridge in the reservoir area of the Changjiang Gorges and the finite-element analysis procedure, to work out variation regularities of cable forces, and to seek the cable force value that satisfies the prefigurative camber in each hoisting process, by adopting the optimal method in genetic algorithms, and to minimize the differences of cable forces in hoisting and closure. The paper, on the basis of the analysis and calculation of concrete-filling in different orders by using the finite-element procedure of the dimensional frame, tries to get the best order, then to get the most rational residue stresses in steel tube and concrete in it, finally to provide a theoretical account for the construction unit in the choice of the reasonable concrete filling order.
出处
《钢结构》
2003年第6期40-42,共3页
Steel Construction
关键词
钢管混凝土
拱桥
扣索索力
有限元
遗传算法
青干河大桥
concrete-filled steel tube arch bridge cable force finite element genetic algorithm
