Pan Shengshan

Bio: Pan Shengshan is an academic researcher. The author has contributed to research in topics: Natural rubber & Shape-memory alloy. The author has an hindex of 3, co-authored 23 publications receiving 42 citations.

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

Abstract: 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

Locally-embedded steel pipe concrete column type aseismatic bridge pier

Abstract: 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.

Reinforcing method for winding thermal excitation embedded shape memory alloy wires on concrete column

Abstract: The invention discloses a reinforcing method for winding thermal excitation embedded shape memory alloy wires on a concrete column, and belongs to the field of concrete structure reinforcing. According to the force-bearing requirement of a reinforcing member, the to-be-reinforced zone is determined, and a protection layer of the to-be-reinforced zone is wholly or partially chipped away; according to the force-bearing requirement of the reinforcing member, the winding range, interval and diameter of the thermal excitation embedded shape memory alloy wires are further determined, the size and position of positioning screws are determined; the shape memory alloy wires are positioned through the positioning screws and fixed through anchorage device finally; the shape memory alloy wires are heated to the reverse change finish temperature or above of the shape memory alloy wires so that the shape memory alloy wires can generate restoring force; and heating is stopped, after the shape memory alloy wires are naturally cooled, the protection layer is repaired with epoxy-cement mortar, and the surface of the repaired concrete column is coated with fireproof paint. The reinforcing material is buried in the protection layer, so that the corrosion resistance is good, no anchorage device is exposed, the reinforced structure is good in durability, finished product protection is easy, the structure is consistent with an original structure after being reinforced, and the appearance is not influenced.

Method for designing arch bridge whose arch axis is cycloid

Abstract: The invention provides a method for designing an arch bridge whose arch axis is a cycloid, and belongs to the technical field of bridge engineering. The method comprises the following steps: firstly determining a span, a width and a load standard of the arch bridge; then designing an arch axis whose equation is a cycloid, wherein the cycloid equation is: X = R * (T-SIN (T)), Y (R * = 1-COS (T)), wherein 2R refers to the height of the arch bridge, T refers to a parameter from 0 to 2 pi, R = L/2 pi, and L refers to the span; designing a main girder and a boom, wherein the boom is an inclined boom, and the position of the boom is adjusted to ensure reasonable stress; and finally designing according to the design method of an ordinary arch bridge. In the design method, the arch axis whose equation is the cycloid is adopted, so the stress of the arch bridge is more reasonable in combination with the inclined boom, the materials are better saved, and the aesthetic effect of the bridge is better.

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

Abstract: 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.

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

Abstract: 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.

Construction method for cantilever assembly steel arches for cast-in-situ large-span concrete arch bridge

Abstract: The invention relates to the technology of cantilever assembly steel arches for an arch bridge, and particularly relates to a construction method for cantilever assembly steel arches for a cast-in-situ large-span concrete arch bridge According to the invention, the steel arch is formed by jointing a standard segment, an adjustment segment, an arch crown segment and an arch springing segment, a construction process mainly comprises assembly for the steel arches and transversal movement for the steel arches which are performed simultaneously at the both sides spanned by the bridge during construction The construction method is characterized in that a transversal system adopts a transversal connection mode, and an arch top surface and a floor adopt a flat connection mode during a segment connection process; the segments are connected by adopting bottom chord pin shafts and top chord bolts; and the specific construction is performed according to six steps including arrangement for a steel arch abutment, assembly for steel arch segments, arrangement for a transversal cable wind rope, pavement for a main arch ring, detachment for the steel arches, and transversal movement for the steel arches The method is saving in material use, high in speed, reasonable in structure, advanced, economic and practical in technology, and suitable for arch bridges with different spans

Locally-embedded steel pipe concrete column type aseismatic bridge pier

Abstract: 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.

Manufacturing method of arch hinge of steel arch bridge

Abstract: The invention discloses a manufacturing method of an arch hinge of a steel arch bridge and belongs to the technical field of bridge steel structure machining and manufacturing. The manufacturing method of the arch hinge of the steel arch bridge includes the following steps that hinge shaft and bearing bush plate materials are obtained; holes are evenly drilled in the hinge shaft plate material with the axial center generatrix of the contact face of a hinge shaft and a bearing bush being a symmetry line; the ends of the hinge shaft and the bearing bush plate materials are pressed through a veneer reeling machine, and a hinge shaft cylinder and the bearing bush are reeled; a generatrix is formed in the axial center of the bearing bush in an etched manner and coincides with the axial center generatrix of the hinge shaft, and rear rolling bolts of drilled hole groups are arranged; a transverse space ring is placed in the hinge shaft, the transverse space ring in the hinge shaft and a longitudinal structure are welded, and then a hinge shaft end plate is welded; the hinge shaft and a bearing bush plate which are connected together through bolts are hoisted into a bearing bush base to be welded; the hinge shaft and the bearing bush bolts are disassembled, and the arch hinge is obtained after bolt holes are plugged; the gap between the hinge shaft and the bearing bush is detected; and the hinge shaft is disassembled to be welded together with an arch foot section. The manufacturing method of the arch hinge of the steel arch bridge increases material utilizing rate, is not limited by machining of large mechanical cutting equipment, and is low in cost and short in manufacturing period.