独塔斜拉桥拉索更换方案及其受力分析研究

Research on Cable Replacement Scheme and Force Analysis of Single-pylon Cable-stayed Bridge

摘要:

以河北省唐山市某跨海独塔单索面斜拉桥为研究背景，通过对其实际情况的分析，针对不同的换索顺序和交通组织方案进行论证。设计了4种不同换索工况，并计算了不同换索工况下的索力变化值、主梁应力变化值、主梁挠度变化值、主塔内力变化值。分析结果表明，单根索释放的索力主要由邻近范围内的拉索承担，不同位置的索对全桥的受力影响有较大差异性。分析结果可为换索方案的优化和换索全过程提供指导。

Abstract:

Taking a cross-sea single-pylon single-plane cable-stayed bridge in Tanshan City of Hebei Province as the research background, through the analysis of its actual situation, the different cable replacement sequences and the traffic organization schemes are discussed. Four different cable replacement conditions are designed. And the changes in cable force, main girder stress, main girder deflection and main pylon internal force under the different cable replacement conditions are calculated. The analysis results show that the cable force released from a single cable is mainly borne by the cables within the adjacent range, and the influence of cables at different positions on the force of the entire bridge is significantly different. The analysis results can provide the guidance for the optimization of cable replacement schemes and the whole process of cable replacement.