The invention discloses a damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and a manufacturing method thereof, and belongs to the field of bridge engineering. An exposed node connecting piece consists of a foot plate, anchor bolts, end connecting plates and buckling restraining sleeves. A connecting plate is mounted between prefabricated steel pipe concrete sections through high-strength bolts; the exposed node connecting piece is connected with each of a cover beam and a bearing platform by utilizing the anchor bolts, and is connected with a prefabricated steel pipe concrete section through the high-strength bolts relying on the end connecting plates. A pre-stressed tendon penetrates through a section prefabricated steel pipe concrete pier; the two ends of the pre-stressed tendon are respectively anchored to the interiors of the bearing platform and the cover beam by using anchorage devices. The energy consumption-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier disclosed by the invention has the characteristics of small post-seismic residual displacement, high energy consumption capacity, controllable energy consumption, high assembling degree, convenience and quickness in construction process, greenness, high efficiency, energy conservation, environment friendliness, easiness in factory production, convenience and quickness in construction, and the like; the construction period of the pier can be remarkably shortened.

Damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and manufacturing method thereof

The invention discloses a steel-fiber composite concrete combination column which comprises an inner steel pipe arranged in the center. A non-adhesive steel strand is arranged in the inner steel pipe. An outer steel pipe is arranged on the outer side of the inner steel pipe. Concrete is poured to the portion between the inner steel pipe and the outer steel pipe. Multiple additional small steel pipes are evenly distributed on the outer side of the outer steel pipe. Each additional small steel pipe is internally provided with an additional non-adhesive steel strand. The steel-fiber composite concrete combination column further comprises a composite reinforcement cage which is coaxial with the outer steel pipe and is arranged on the outer side of the outer steel pipe, both the outer steel pipe and the composite reinforcement cage are coated with high-ductility concrete, and the outer side of the high-ductility concrete in a core region is coated with an anti-peeling layer. The steel-fiber composite concrete combination column is mainly characterized in that the controlled second rigidity generated after yielding and the small post-earthquake residual displacement are stabilized, quick repair can be achieved after an earthquake, and the column has the high durability similar to that of a fiber composite reinforcing structure. The concrete combination column can be used for a bridge pier column and a building structural column and can adapt to high-corrosion environments such as the ocean. A repairing method is further provided. The damaged concrete combination column can be quickly repaired.

Steel-fiber composite concrete combination column and post-earthquake repairing method thereof

The invention provides a locally-embedded steel pipe concrete column type aseismatic bridge pier, and belongs to the technical field of structural design of bridges. The aseismatic bridge pier comprises longitudinal ribs, stirrups, steel pipes, common strength concrete, high strength concrete and a bridge pier foundation. According to the bridge pier, a steel pipe concrete column is locally embedded to the reinforced concrete bridge pier, the advantage of high ductility of the common strength concrete bridge pier and the advantages of high pressure resistance, high shear resisting, high bearing capacity and high ductility of the steel pipe high strength concrete are fully utilized, and therefore, the shear resistance, the pressure resistance, the bearing capacity, the ductility and the energy consumption capacity of the bridge pier can be improved, the bridge pier can be avoided shearing damaging and bending conquassation, and as a result, the aseismatic performance of the reinforced concrete bridge pier can be effectively improved; the steel pipe concrete column is embedded in the local maximum force bearing range of the bridge pier, so that the purpose of the improving the aseismatic performance of the bridge pier is achieved, and the purpose of minimizing the cost of the bridge pier and the construction difficulty can be reached. The bridge pier can be widely applied to the field of bridge construction design.

Locally-embedded steel pipe concrete column type aseismatic bridge pier

A steel-fiber reinforced polymer (FRP) composite material reinforced concrete column comprises an inner steel pipe arranged in the center, wherein the inner steel pipe is internally provided with an unbonded steel strand; the outside of the inner steel pipe is provided with an outer steel pipe, concrete is poured between the inner steel pipe and the outer steel pipe, a plurality of additional small steel pipes are evenly arranged outside the outer steel pipe, and each of the additional small steel pipes is internally provided with an additional unbonded steel strand A composite bar cage coaxial with the outer steel pipe and arranged on the outside thereof is also provided, wherein both the outer steel pipe and the composite bar cage are covered by high-ductility concrete, and at a core area, the outside of the high-ductility concrete is wrapped with an anti-spalling layer

Steel-fiber composite material concrete combined column, and post-earthquake repair method thereof

The invention provides a prefabricated segmental assembling pier in the form of component combination for the bottom segments. The prefabricated segmental assembling pier includes a bearing cap, a small-diameter pier column, hollow segmental pier bodies, a prestressed steel bars and a plurality of solid pier bodies. The bearing cap is fixed. The lower end of the small-diameter pier column is fixedwith the bearing cap, the hollow segmental pier bodies are arranged along the circumference of the small-diameter pier column and are fixed with the small diameter pier column. The solid pier bodiesat the lowest end are arranged on the small diameter pier column, and the hollow segment pier bodies, the upper solid pier body is arrange on the lower solid pier body, the prestressed steel bars respectively pass through the solid pier bodies, the hollow segment pier bodies and are fixed on the bearing cap or respectively pass through the solid pier bodies, and the small diameter pier column andare fixed on the bearing cap.

Prefabricated segmental assembling pier in the form of component combination for the bottom segments

The utility model provides an anti-seismic bridge pier provided with a locally buried concrete-filled steel tubular column, and belongs to the technical field of bridge structure design The anti-seismic bridge pier comprises longitudinal bars, stirrups, normal-strength concrete, high-strength concrete and a bridge pier foundation The concrete-filled steel tubular column is locally buried in a reinforced concrete bridge pier, and the advantage of good ductility of a normal-strength concrete bridge pier and the advantages of high pressure-resistant and shear-resistant bearing capacity and good ductility of a high-strength concrete-filled steel tube are fully utilized, so that the shear-resistant and pressure-resistant bearing capacity, ductility and energy-dissipating capacity of the pier are improved, shear failure and bending collapse of the pier are avoided, and the anti-seismic performance of the pier is effectively improved The concrete-filled steel tubular column is buried in only a local range, with maximum stress, of the pier, so that the purposes of improving the anti-seismic performance of the pier and reducing the construction cost and construction difficulty of the pier as much as possible are achieved The anti-seismic bridge pier can be widely used in the field of bridge project design

Qiu Wenliang

Papers

Anti-seismic bridge pier provided with locally buried concrete-filled steel tubular column

Locally-embedded steel pipe concrete column type aseismatic bridge pier