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 provides a tension-compression elastic support which comprises a support top plate, an outer casing, an inner casing, an annular baffle, a steel core pillar, a spring partition plate, a steel sliding plate, a wear-resistant plate, a support bottom plate, an upper layer disk spring set and a lower layer disk spring set. The specification and the quantity of disk springs selected in the support are controlled, so that the elastic stiffness required by a structural design is provided, and the bearing capacity and deformation requirements of the support can be balanced; the tension-compression elastic support can be widely applied to the field of engineering design; the design problem that can be solved by large-scale design alteration before can be solved at very small cost; the structural design is more flexible; the stress is more reasonable; and the construction cost of engineering is lowered.

Tension-compression elastic support

Failure Analysis for Overall Stability against Sliding and Overturning of a Girder Bridge

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 discloses a bridge shock reduction and isolation supporting base and a cable-stayed bridge and suspension bridge supporting structure. The bridge supporting base comprises a left part and a right part, the left part is a transverse disk spring assembly, the right part is a transverse one-way movable supporting base, the left part and the right part are connected in series and connected into an integrated structure through a connecting piece, and a plurality of C-type mild steel dampers can be evenly arranged between a first plate and a second plate in the circumferential direction. The invention discloses application of the bridge supporting base to a cable-stayed bridge and a suspension bridge. After the bridge shock reduction and isolation supporting base is adopted, the transverse vibration period of the structure can be effectively prolonged, and deformation of a disk spring can also consume part of earthquake energy, so that bridge tower transverse seismic response can be remarkably reduced, the amplitude reaches 20-30%, and design difficulty and building cost are effectively reduced.

Bridge shock reduction and isolation supporting base and cable-stayed bridge and suspension bridge supporting structure

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

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

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

The invention provides an embedded type steel anchor box, and belongs to the technical field of bridge structure design. The embedded type steel anchor box comprises a horizontal steel pulling plate, an anchor bearing plate, a seat plate, an upper force transfer plate, a lower force transfer plate, a rubber plate and a felt. The rubber plate forms a deformation cushion zone between the steel anchor beam and the concrete at the joint surface of the steel and concrete; the horizontal component force of the inhaul cable is maximally suffered by the steel anchor box via the deformation effect of the deformation cushion zone, thereby greatly reducing the horizontal force suffered by the tower wall, thus ensuring the load-bearing safety of the tower columns. The embedded type steel anchor box can be widely applied to the field of engineering design; such an embedded type steel anchor box can be installed in smaller space of tower columns of medium and small scales of cable-stayed bridge; the stress of the concrete tower wall is greatly reduced at the same time. The embedded type steel anchor box makes the structure design more flexible, makes the stress more reasonable, and makes the engineering construction convenient.

Embedded type steel anchor box

The invention provides a prefabricated assembled concrete pier and belongs to the technical field of bridge engineering. The assembled concrete pier is prefabricated through the following steps of firstly, welding shear studs to steel plates, then pre-burying the steel plates in prefabricated concrete pier segments, reserving prestressed steel beam ducts in the prefabricated concrete pier segments and the steel plates, mounting the prefabricated concrete pier segments in order, pulling a prestressed steel beam, and finally performing grouting and anchor sealing, wherein the preburied steel plates are arranged between the prefabricated concrete pier segments and are in contact with the prefabricated concrete pier segments. According to the prefabricated assembled concrete pier, seams are made of steel so that the bearing capacity of the seams of the prefabricated concrete pier segments can be improved, and the anti-seismic capacity of the pier can be improved.

Jiang Tao

Papers

Tension-compression elastic support

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

Locally-embedded steel pipe concrete column type aseismatic bridge pier

Embedded type steel anchor box

Prefabricated assembled concrete pier