CAJ | 학술논문

荆岳长江公路大桥主桥为主跨816 m的双塔不对称混合梁斜拉桥，在成桥状态下，索塔锚固采用两端固定的钢锚梁结构体系。为研究钢锚梁平衡斜拉索索力的作用，验证超静定结构体系钢锚梁的合理性，采用ANSYS软件建立索塔锚固区有限元模型，分析钢锚梁施工过程中2种不同的支承体系方案，并通过足尺模型试验研究钢锚梁对斜拉索索力的分配比例。结果表明：斜拉索初张时采用边跨固定、中跨滑动，斜拉索张拉后两端固定结构体系的钢锚梁承担了斜拉索索力水平分力的83．7％，钢锚梁与塔壁对索力水平分力的分配比例为8∶2，该体系能够发挥钢锚梁平衡斜拉索索力的作用，且结构可靠度高。
형악장강공로대교주교위주과816 m적쌍탑불대칭혼합량사랍교，재성교상태하，색탑묘고채용량단고정적강묘량결구체계。위연구강묘량평형사랍색색력적작용，험증초정정결구체계강묘량적합이성，채용ANSYS연건건립색탑묘고구유한원모형，분석강묘량시공과정중2충불동적지승체계방안，병통과족척모형시험연구강묘량대사랍색색력적분배비례。결과표명：사랍색초장시채용변과고정、중과활동，사랍색장랍후량단고정결구체계적강묘량승담료사랍색색력수평분력적83．7％，강묘량여탑벽대색력수평분력적분배비례위8∶2，해체계능구발휘강묘량평형사랍색색력적작용，차결구가고도고。
The main bridge of Jingyue Changjiang River Highway Bridge is a asymmetric span hybrid girder cable‐stayed bridge with double pylons and with a main span of 816 m .The anchor‐age in a pylon of the bridge in completion state is of the steel anchor beam structural system with its two ends being fixed .To study the function of the anchor beam balancing the stay cable forces and to verify the rationality of the anchor beam of the statically indeterminate structural system , the software ANSYS was used to set up the finite element model for the anchorage in the pylon , 2 different support schemes adopted for construction of the anchor beam were analyzed and the ra‐tios of the stay cable forces distributed by the anchor beam were studied by means of the full‐scale model tests .The results of the study show that the anchor beam using the structural system with its side span end being fixed ,its central span end being slide at the time of initial tensioning of the stay cables and with its two ends being fixed after tensioning of the stay cables can bear 83 .7%horizontal component of the stay cable forces and the ratio of the horizontal component distributed by the anchor beam and pylon wall is 8∶2 ,proving that the anchor beam can play the role of bal‐ancing the stay cable forces and is also structurally highly reliable .