The horizontal displacement of abutment will cause the vertical deflection of the main arch,and the additional internal force produced will make the stress of the key section of the main arch more unfavorable.These will affect the ultimate bearing capacity of arch bridge.The finite element software Midas Civil is used to establish the plane frame model of reinforced concrete arch bridge,and the abutments are given different horizontal displacements so as to observe the variation of the displacement,internal force and resistance of the critical section,thus to find the limit of the horizontal displacement met the ultimate bearing capacity of the arch bridge.And it is used to guide the construction of the bridge.%桥台水平位移会使主拱圈产生竖向挠度,并且产生的附加内力使得主拱圈某些关键截面受力更加不利,影响拱桥的极限承载能力;通过有限元软件Midas Civil建立钢筋混凝土钢架拱桥平面杆系模型,对桥台施加不同的水平位移,观察各关键截面位移及内力和抗力的变化;最终确定该拱桥的满足极限承载能力的水平位移限值,并以此为依据指导该桥施工.
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