With the wide application of extra-wide bridges,the research on their seismic performance is necessary.A proposed airport viaduct in Yunnan Province is an extra-wide bridge.The article takes this extra-wide bridge as the engineering background,establishes the spatial rod system model and solid model,analyzes its dynamic properties.Under the action of E1 and E2 earthquakes,combined with the bending moment curvature curve of the bridge pier,analyze its seismic performance and performs local analysis of the piers under E2 earthquakes with the solid model established by ABAQUS software.The analysis shows that the bridge is in the elastic working stage under E1 earthquake,and some piers enter the plastic working stage under E2 earthquake,but the plastic deformation,plastic displacement and plastic hinge angle are within reasonable range,and the shear strength of the diagonal section of the piers all meet the requirements,indicating that the seismic performance of this extra-wide bridge is good.
万方数据