一种提高刚架拱桥刚度的方法及其应用OA北大核心

To improve the rigidity of rigid-frame arch bridges,this study proposes a reinforcement method-the plate-truss composite strengthening technique,which involves adding steel trusses to the rigid-frame arches on both sides,re-laying the bridge deck steel bars,and newly pouring concrete on the original deck to form a plate-truss composite structure capable of resisting loads.A bridge in Liucheng County of Liuzhou is applied to Midas Civil.The mechanical properties of the structure before and after reinforcement are compared.Thus,the bridge is reinforced by the method.Through the load test,the deflection of the reinforced bridge under the load test and the impact coefficient under the barrier-free sports car test are measured.The results show that the rein-forcement method can greatly improve the structural stiffness.