Research on Reasonable Structural Form of Portal Pier of Urban Bridge in High Seismic Region
In the construction of urban bridges,when the new bridge intersects with the existing facilities or the clearance under the bridge is limited,the portal pier is often used to reasonably avoid the structures under the bridge.Based on a bridge engineering example in the high seismic region,this paper studies the influence of the stiffness ratio of bent cap to pier column on the stress of four-column portal pier,and gives two schemes of prestressed concrete bent cap with support on side pier and consolidation of pier column and steel bent cap.The seismic performance analysis and engineering economy comparison are carried out.The results show that the latter one has better seismic performance and engineering economy,which can be popularized in urban bridge construction.
high seismic regionurban bridgeportal pierstiffness ratioseismic performance
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