NUMERICAL SIMULATION OF MASONRY BRIDGE ON COHESIVE ELEMENT
Ancient stone arch bridges are generally built with block stones,the materials of which are with obvious heterogeneity.Moreover,the bridge is prone to cumulative deformation that changes the geometric shape of the arch ring under long-term loading,thereby affecting its structural stress.With traditional integral finite element models,it is difficult to accurately simulate the stress performance of the ancient stone arch bridge.A parameterized model-ing method is used to establish a two-phase numerical model to accurately simulate the actual stress state of the an-cient stone arch bridge and analyze the factors affecting its bearing capacity.The material nonlinearity is simulated through cohesive elements,and initial defects are introduced through a self-designed program.The influence of geo-metric and material parameters on the bearing capacity and failure mode of arch bridges is analyzed.The results indi-cate that geometric and material parameters significantly affect the bearing capacity and failure mode of the struc-ture,providing a basis for the design,repair,and reinforcement of stone arch bridges.
masonry bridgeinitial imperfectionstwo-phase numerical modelcohesive elements
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