Concrete-filled steel tube pier

Abstract

The invention provides a concrete-filled steel tube pier. The pier includes a crossbeam, pier columns and a tie beam; the tie beam includes a tie beam main body and a tie beam energy consumption assembly; the tie beam main body includes a first steel tube, a first soft steel inner core, first concrete and a first connection board; the tie beam energy consumption assembly includes a second steel tube, a second soft steel inner core, a first PVP film, second concrete and a second connection board; and the second connection board is fixedly connected to the corresponding first connection board through bolts. Through the arrangement of the tie beam, the intensity and rigidity of the double column piers in transverse direction of a bridge can be enhanced, the tie beam yields before the pier under the action of earthquake, so that a plastic hinge can be formed, earthquake energy can be dissipated, damage and destruction processes of the pier can be delayed, and relatively good earthquake-proof performance can be achieved; and as the fixed connection of the connection boards can be realized through the bolts, the energy consumption assembly can be rapidly replaced after earthquakes, so that rapid repairing can be realized.

Description

technical field [0001] The invention relates to a bridge pier structure, in particular to a steel pipe concrete bridge pier. Background technique [0002] Many earthquakes at home and abroad have shown that bridge structures, as an important part of the traffic lifeline, are of great significance to post-disaster first aid and restoration and reconstruction. However, traditional bridge piers mostly use reinforced concrete structures, and reinforced concrete bridge piers are self-heavy, poor in ductility, difficult to construct, long in construction period, difficult to repair, and high in cost. Restoration will cause great difficulties and huge indirect losses to disaster relief after the earthquake. Therefore, the realization of bridge restorability has great research value. [0003] With the rapid development of modern cities in China, there are more and more interchanges and viaducts, and the application of concrete filled steel pipe piers is becoming more and more exten...

AI Technical Summary

Problems solved by technology

However, the existing concrete-filled steel tube piers are prone to shear failure and ultra-low cycle fatigue cracks under actual earthquakes. It is difficult to repair after the earthquake or the repair time is very long, which seriously affects disaster relief and post-earthquake emergency and normal use.

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