CAJ | 학술논문

以南京江心洲大桥为工程背景,对空间缆索自锚式悬索桥主鞍座的相关问题进行研究.以大型通用有限元程序为平台,采用二次开发技术,建立精细化有限元模型,在此基础上采用合理的加载模式对其进行空间受力分析,并阐述与空间主鞍座相匹配的主缆切点简化修正方法.结果表明:空间主缆在成桥状态对主鞍座横向力的作用会造成鞍槽外侧壁应力大于内侧壁的应力;主缆横向体积力会对主鞍座压紧装置和鞍体产生梯度分布的竖向挤压力;自锚式悬索桥体系转换过程中缆索的几何非线性效应显著,体现在空缆到成桥状态主缆与主鞍座空间切点位置会有较大的变化.
이남경강심주대교위공정배경,대공간람색자묘식현색교주안좌적상관문제진행연구.이대형통용유한원정서위평태,채용이차개발기술,건립정세화유한원모형,재차기출상채용합리적가재모식대기진행공간수력분석,병천술여공간주안좌상필배적주람절점간화수정방법.결과표명:공간주람재성교상태대주안좌횡향력적작용회조성안조외측벽응력대우내측벽적응력;주람횡향체적력회대주안좌압긴장치화안체산생제도분포적수향제압력;자묘식현색교체계전환과정중람색적궤하비선성효응현저,체현재공람도성교상태주람여주안좌공간절점위치회유교대적변화.
Based on the engineering background of the Jiangxinzhou Bridge in Nanjing, issues related to the spatial main saddle of the self-anchored suspension bridge are studied.The refinement finite element model is established by the secondary development technology based on the platform of the general finite element program, and a reasonable load pattern is used in its spatial structural analysis, by which its path of force transference and stress distribution are obtained.Matched with the spatial main cable, the tangency point correction method is also discussed.The results show that the lateral wall stress of the saddle groove is higher than the stress within the wall due to the role of lateral forces in the finished bridge state; the horizontal volume force of the main cable can generate a gradient distributed vertical extrusion pressure on the saddle clamping device and the main saddle body; the geometric nonlinear effect of the self-anchored suspension bridge cable system in the construction process is significant, which can be reflected in the spatial tangent point position of the main cable with the main saddle changes a lot from free cable to finished cable.