Research on Seismic Performance of Small Radius Curved Continuous Rigid Frame Bridges for Modern Trams in High Earthquake Area
The continuous rigid frame bridges with the pier and beam consolidation has the characteristics of good integrity,high torsional stiffness,and low structural height of bridges,which has certain application value in the construction of small radius curve bridges for modern trams.At present,this structures are rarely used in high earthquake regions.In order to study the seismic performance of the structure,combined with the example of the project,based on the Pushover method and considering the influence of higher-order vibration modes,the capacity curve of the small radius curve continuous rigid frame bridges is obtained through multi-directional pushover analysis using Midas Civil finite element software.Then the performance points of the structure under seismic fortification are obtained through the capacity spectrum method,and the seismic performance of the structure is studied from the aspects of plastic deformation capacity,plastic hinge development,and internal force distribution of the structure.The research results indicate that the small radius curved continuous rigid frame bridges have significant horizontal bearing capacity and displacement deformation capacity,and has good seismic performance,meeting seismic fortification requirements.It can provide reference value for the application of modern tram small radius curved bridge engineering in high seismic areas.
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