关键词: 拱桥, 优化设计, 有支架施工, 加载程序, 临时压重, 变形

Abstract: Taking Heping Bridge engineering as an example, the deformation of arch scaffolding loading procedure and stress calculation of drafted by construction units are carried out. Aiming at the problem of ＂W＂ deformation and inhomogeneous stress of the arch scaffolding, some general principles of optimizing trestle construction loading procedure are put forward and the method of temporary pre-loading near arch crown in the process of loading has been carried out. Then, the crude loading procedure is optimized by finite element program. The result indicates that the optimized procedure of construction loading makes the arch scaffolding deformation and stress become reasonable. Therefore, the goal of optimizing the loading procedure is realized

Key words: arch bridge , optimization design , trestle construction , loading procedure , temporary pre-loading , deformation ;