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通过对部分换索桥梁换索顺序的调研,按照拉索不同的布置形式,总结了目前拉索更换所采用的主要顺序,并利用有限元分析方法对某双塔双索面斜拉桥进行了模拟换索,分析得到了偏于安全的换索顺序。通过拆单根索的弯曲应变能的变化,分析了斜拉桥换索的整体顺序。通过分析不同换索工况下的索力增量变化规律,包括单塔拆1根、双塔同侧索面对称拆4根、双塔不同侧索面反对称拆4根等3种工况,对拉索更换顺序进行了研究,并对其中的同侧索面和不同侧索面拆除4根拉索的工况进行了主梁线形的分析,建立了有限元模型。分析认为,斜拉桥拉索的更换宜从短索向长索反对称进行。
Based on the investigation of the cable changing sequence in some cable changing bridges, the main order of the current cable changing is summarized according to the different layout of cables. The finite element analysis Simulation for the cable, the analysis was partial to the safety of the cable order. Through the change of the bending strain energy of dismantling a single cable, the overall sequence of the cable changing cable is analyzed. Through the analysis of the changing regularity of the increment of cable force under different changing conditions, including 1 single tower demolition, 4 symmetrical demolitions on the same side of twin towers and 4 anti-symmetrical demolitions on different sides of twin towers In this paper, the order of cable replacement was studied, and the girder linear analysis was carried out on the condition of removing four cables from the same side surface and different side surfaces, and the finite element model was established. Analysis, cable stayed bridge cable replacement from the short cable to the long cable antisymmetric.