53results about How to "Improve structural ductility" patented technology

The invention relates to an ultra-high performance cement-based pi-shaped girder poured with an ultra-high performance cement-based composite. The pi-shaped girder meets the following conditions: H1/B1 is equal to (0.2-1); T1/H1 is equal to (0.01-0.3); T2/B3 is equal to (0.1-0.5); B2/B1 is equal to (0.2-0.8); B3/B2 is equal to (0.1-0.5); T2/H1 is equal to (0.02-0.2); R2/R1 is equal to (0.3-0.8); R3/R2 is equal to (0.1-0.5); B1 is larger than or equal to 1500 mm and is smaller than or equal to 5000 mm; H1 is larger than or equal to 500 mm and is smaller than or equal to 3000 mm; the span L is equal to (10-200 m). According to the ultra-high performance cement-based pi-shaped girder, the grain composition of multielement cementing materials and grain composition of aggregates are optimized, and a chemical additive is used, so that the compressive strength reaches 170 MPa or above under standard curing for 28 d under the precondition that the material has good fluidity; the ultra high strength cement-based composite and a high strength rib material are adopted, the construction is reasonable, and the design is optimized, so that the whole component has the characteristics that light weight and durability are achieved, the upper structure and the deck slab are integrated, and quick prefabrication and assembly can be achieved, while the bearing capacity is guaranteed; the ultra-high performance cement-based pi-shaped girder can be applicable to quick construction of small-sized and medium-sized bridges in the fields of highways and railways.

The invention relates to a detachable U-shaped corrugated belt double-layer inclined-slit steel plate damper, and belongs to the technical field of civil engineering energy dissipation and shock absorption. The metal damper is composed of a plurality of U-shaped energy dissipation parts, double-layer inclined-slit steel plates, an upper cover plate and a lower cover plate. The metal damper is based on the design concepts that multidirectional energy dissipation is achieved, energy dissipation parts are detachable, the shear bearing capacity is improved, out-of-plane buckling is restrained, multiple shear energy dissipation mechanisms work cooperatively, and a double-insurance mechanism is adopted, and the limitation of a traditional metal damper is broken through. U-shaped energy dissipation units are connected in parallel, so that the multidirectional energy dissipation of the damper is effectively realized. Through a reasonable design, the damper can achieve multi-position yield, theenergy dissipation performance is stable, and the shear bearing capacity is greatly improved. The U-shaped energy dissipation parts and the double-layer inclined-slit steel plates dissipate energy together to form the double-insurance mechanism. After an earthquake, the normal use function can be recovered only by replacing the energy dissipation parts. The metal damper develops towards the assembling direction, is easy and convenient to replace and obvious in economic benefit, can be effectively combined with a support, and provides lateral force for the support.

The invention relates to a truss type steel-reinforced concrete framework side node with an energy dissipation device. The steel skeleton in a beam is a truss type steel skeleton, which comprises vertical members, chord members and diagonal members. T-shaped profile steels are arranged on the upper and the lower parts of the beam to serve as the chord members, and are connected through angle irons, so that a truss type steel skeleton concrete beam member is formed. The vertical members and the chord members on the ends of the beam and in the core area of the node form a rectangular structure, the diagonal members are crossed, and are welded between the upper chord members and the lower chord members, the truss type steel skeleton extends into a column, and the length of the extending end is 0.9 times as the width of the section of the column in the direction. The ductility, equivalent viscous damping coefficient he and average energy dissipation coefficient Beta of the truss type steel-reinforced concrete framework side node with the energy dissipation device disclosed by the invention are remarkably increased in comparison with the ductility, equivalent viscous damping coefficient he and average energy dissipation coefficient Beta of reinforced concrete nodes. The truss type steel-reinforced concrete framework side node with the energy dissipation device has good structural seismic resistance and energy-dissipating capability.

The invention relates to a multiple-chamber type double steel plate concrete combined shear wall, which integrally consists of two wall body surface steel plates (6) and a wall inner plain concrete (7), wherein the wall body surface steel plates (6) and the wall inner neat concrete (7) are connected by bolt screws (2), split reinforced bars (1) and vertical separating plates (4) to ensure the cooperated work, the bolt screws (2), the split reinforced bars (1) and the vertical separating plates (4) are welded on the steel plates, the wall body space between the two steel plates is separated into bin chambers by the vertical separating plates (4), the inside of one part of bin chambers is cast with concrete to form concrete bin chambers (8), the other part of bin chambers is kept empty and is filled with a foam aluminum porous energy dissipating material to form an empty bin chamber (9) and an energy dissipating material filling bin chamber (10), and then the alternative distribution of the concrete bin chambers (8), the empty bin chamber (9) and the energy dissipating material filling bin chamber (10) is realized. The multiple-chamber type double steel plate concrete combined shear wall has the advantage that the rigidity is reduced, and the extensibility is increased, so the suitability is further improved.

The invention discloses a combined rigid frame steel plate girder-pier girder solid structure. According to the structure, an I-shaped steel main girder and a crossbeam form a box-shaped grid room, perforated plate connection pieces are arranged inside web plates of the box-shaped grid room and penetrate through reinforcing bars and pour concrete, so as to solidify the pier girder. To ensure thatthe load born by the main girder is transmitted to the pier effectively, perforated plate connection pieces are arranged inside web plats of the steel main girder and the crossbeam of the box-shaped grid room, the perforated plates penetrate through common reinforcing bars and then concrete is cast so as to resist shear force, shaft force and bending moment of the pier girder solidified part; thesteel plate girder and the concrete pier are connected through the perforated plates, so that the structure is simple, bears forces reasonably and transmits force reliably, can meet various requirements of normal use and limit loading, improves the crossover capability of the bridge while the dead weight is reduced, is convenient and quick in construction, and solves main problems that the web plate concrete cracks, the middle span warps downwards and the anti-seismic performance is reduced in the existing concrete rigid frame bridge due to long-term load.

The invention belongs to the technical field of earthquake resistance of building structures, and particularly relates to an energy dissipation type coupled anti-seismic wall with reinforcing bars, grouting holes, building blocks and a combined coupling beam and a manufacturing method. The energy dissipation type coupled anti-seismic wall is adopted by a bearing wall of a multi-storey building in a town. The energy dissipation type coupled anti-seismic wall comprises a building block wall body, a coupling beam, soft steel dampers, single-reinforcement core columns, construction core columns and horizontal pull connecting ribs. According to the invention, due to the combined action of the core columns and the horizontal pull connecting ribs, the building block wall body is effectively constrained, and the integrity and the anti-seismic performance of a coupling wall column are improved. The coupling beam and a constraint building block wall beam on the top of the coupling beam are combined to form the shear type combined coupling beam, and the soft steel dampers are arranged on the portions of connection between the coupling beam and the coupling wall column, so that multiple energy dissipation and seismic resistance defense lines of the coupled anti-seismic wall are formed, and the ductility and the energy dissipation capacity of the wall body are enhanced.

The invention discloses a flexible reinforced earth structure based on an 8-shaped tyre and relates to a reinforced earth structure. A basic unit structurally comprises 8-shaped waste tyres (10), high-strength plastic bolt nuts (20) and building padding (30). The high-strength plastic bolt nuts (20) are connected among the 8-shaped waste tyres (10), and the building padding (30) is paved at holes inside and outside the 8-shaped waste tyres (10). The 8-shaped waste tyres (10) are arranged in a plane transversely and longitudinally to form a planar net structure. A three-dimensional net structure is composed of a plurality of layers of vertical planar net structures. The flexible reinforced earth structure is easy to compact and avoids damage caused by too much deformation. The reinforced earth structure is good in ductility and durability, low in modulus of deformation, high in damp and good in seismic resistance and has good deformation adaptation and long-term stability. The reinforced earth structure is simple, convenient to construct and low in cost, fully uses waste and earth materials on the field and reduces environment pollution and covering area.

The invention discloses a combined dense rib plate as well as a manufacturing method and an assembled type plate-column structure thereof, for improving the shock resistance and the impact resistance of combined dense rib plates. The combined dense rib plate comprises concrete wing plates, anti-shearing connecting parts and steel beams, wherein the upper wing edges of the steel beams are connected with the anti-shearing connecting parts; the concrete wing plates are positioned above the steam beams and are connected with the steel beams through the anti-shearing connecting parts; the steel beams comprise transverse beams and longitudinal beams; the transverse beams are in orthogonal connection with the longitudinal beams; grids are formed between every two adjacent transverse beams and between every two adjacent longitudinal beams which are in orthogonal connection with the two adjacent transverse beams; each transverse beam and each longitudinal beam comprise upper wing edges, lower wing edges which are positioned below the upper wing edges, and webs which are positioned between the upper wing edges and the lower wing edges and are connected with the upper wing edges and the lower wing edges. The combined dense rib plate is applicable to the technical field of building structures.

The invention relates to geotechnical engineering, in particular to a large-dimension steel and concrete combined hollow anti-slide pile and a construction method thereof. The large-dimension steel and concrete combined hollow anti-slide pile comprises a plurality of pile sections which form a square framework by virtue of steel products, wherein concrete covers the inner side and the outer side of the square framework; the steel products are exposed from the upper end and the lower end of the concrete at the inner side; the pile sections are stacked up and down; a connecting point is formed between the steel products of upper and lower adjacent pile sections; and the connecting point is provided with a secondary concrete layer. The large-dimension steel and concrete combined hollow anti-slide pile provided by the invention is mounted in stages in a hole forming process, the mounted pile sections can be used as a protective structure, and are also used as one part of an anti-slide engineering pile, so that the construction speed is shortened, and the materials are saved; and the large-dimension steel and concrete combined hollow anti-slide pile has greater bending rigidity and better structure ductility, so that greater anti-slide bearing capacity can be obtained when the wall thickness is relatively small.

The invention provides a bending-resistant ductile truss frame, and belongs to the field of earthquake proofing of building structures. According to the technical scheme, the bending-resistant ductile truss frame is that a yielding energy dissipating rod is arranged at the span of a bending moment infection point of the truss under the vertical load effect; two ends of the yielding energy dissipating rod are respectively hinged to adjacent lower chord members; the bearing capacity of the yielding energy dissipating rod is less than that of the lower chord members, so that the yielding energy dissipating rod can be yielded earlier than the lower chord members under earthquake; the yielding energy dissipating rod is mounted after the vertical load is loaded. The equivalent damping ratio of the bending-resistant ductile truss frame under fortification and rare occurrence earthquake is obviously increased and more than that of the common truss frame, the shearing force of the base and interlayer displacement are obviously less than those of the common truss frame, and the energy dissipating effect and earthquake absorption effect are obvious; compared with the common truss frame, a frame column of the bending-resistant ductile truss frame is difficultly avoided plastic hinge, so that the strong column and weak beam yielding mechanism is easily achieved, and as a result, the ductility of the structure is improved, and the preset earthquake proofing performance target is achieved.

The invention relates to a combined reinforcement continuous wall and belongs to the technical field of foundation pit support in civil engineering. The combined reinforcement continuous wall can replace a concrete underground continuous wall support mode and a bored concrete pile support mode. The combined reinforcement continuous wall is composed of vertical reinforcements, connection bodies, multifunctional crowns, inner charged materials and outer auxiliary materials. Each vertical reinforcement is composed of a pipe body or formed after the pipe body is combined with a linear body, wherein the linear body is located in the pipe body. Each connecting body is composed of a horizontal component or a vertical component or an inclined component or a plate provided with holes. The crowns are located on the tops of the vertical reinforcements and can be assembled, detached and repeatedly used. After the connecting bodies and the crowns are connected with the vertical reinforcements, a combined reinforcement is formed. The inner charged materials are located in the pipe bodies. The outer auxiliary materials are located outside the pipe bodies. The invention further relates to a construction method of the combined reinforcement continuous wall. When applied to foundation pit support, the combined reinforcement continuous wall and a construction method of the combined reinforcement continuous wall have the advantages that cost can be reduced, the work efficiency can be improved, the safety can be improved, and environmental friendliness can be achieved.

The invention relates to an overall pier and beam built-in connecting structure and a construction method thereof. The connecting structure comprises a main beam and concrete-filled steel tube combined pier. The built-in section of the pier and a main beam are integrally formed in an integral pouring mode, the main beam is arranged between main steel tubes of four corner points of the pier, steel frameworks are connected between the adjacent main steel tubes, and prestress steel strands are arranged between the main steel tubes and on the box walls of the steel frameworks and the main beam. Aiming at the problems that the ultimate bearing capacity of a pier and beam connecting position is lower than other positions of the structure, and the pier beam connecting position is firstly damaged under the earthquake load effect, through structure overall rigidity demonstration and system rigidity matching demonstration, the transverse size of the top face of the pier is increased, a beam body of the main beam is embedded between the main steel tubes of the pier in an overall width mode, the steel frameworks are arranged to be connected with the main steel tubes of the pier, the longitudinal and transverse prestress steel strands are tensioned, finally rebar pouring concrete is arranged, the connecting intensity of the pier and the main beam is improved, the ultimate bearing capacity of the pier and beam fixed connecting position is effectively improved, and then the pier and beam connecting position is not a weak link of a structural system any more.

The invention relates to the technical field of railway station construction, in particular to an elevated single-column station in a high-intensity area and a construction method thereof. Through thedesign that the lower layer is a station hall layer and the upper layer is a platform layer, the station hall layer of a high-speed rail station is directly arranged below the platform layer, and meanwhile, the station hall layer and the platform layer do not occupy too much land area, so that the arrangement of the high-speed rail station is not limited by land any more, the construction cost ofa high-speed rail is reduced, and the development of high-speed rail traffic is promoted. And meanwhile, a steel pipe-concrete combined structure system greatly reduces the dead weight of the structure and reduces the earthquake response. Due to the fact that the dead weight of the structure is reduced, the built height of the elevated single-column station can be effectively increased, and the elevated single-column station has good road landscape.

The invention belongs to the technical field of structural engineering steel structures, and particularly relates to a replaceable column base for a recoverable functional structure. The replaceable column base comprises a bottom layer steel column and a foundation 21, wherein the bottom layer steel column comprises a flange 11, a web 12, a bottom plate 13, a reinforcing part and a replaceable anchor bolt; the flange 11 and the web 12 are connected with the bottom plate 13 through welding; the bottom plate 13 of the bottom layer steel column is placed on the top surface of the foundation 21; and a threaded sleeve 22 is pre-buried in the foundation 21, and the threaded sleeve 22 and the foundation 21 are reliably anchored and connected. The replaceable column base can achieve yield energy dissipation under the earthquake effect so as to protect the bottom layer steel column against bending yield failure, and after an earthquake, rapid recovery of the structure function can be achieved by replacing the anchor bolt.

The invention provides wall anti-seismic mortar, comprising a wall body and a reinforcing mesh, wherein the wall surface of the wall body is uniformly provided with a plurality of holes, the hole diameter is 20-30 mm, the hole spacing is 100-120 mm, the hole depth is 120-180 mm, tie bars with diameter of 4-8 mm are inserted into the holes and are fixed by the mortar poured in the holes, the reinforcing mesh is tied on a wall surface by the tie bars and comprises a plurality of steel bars arranged in an X shape, and the wall surface and the reinforcing mesh are coated with a mortar layer with thickness of 30-80 mm. The wall anti-seismic mortar has strong structural shear capacity and good structure ductility.

The invention discloses a universal base structure for a power distribution device building of a transformer substation. The universal base structure comprises a plurality of first steel bars, a raftpoured from concrete, and a column pier arranged on the raft, wherein the column pier comprises a #-shaped steel frame, a support column and a column leg reinforcing pier; the #-shaped steel frame isflatly laid and embedded into the raft, and welded and fixed to the adjacent first steel bar in the raft; the support column is vertically connected into the central area of the #-shaped steel frame in an insertion manner, a receiving groove used for receiving a part of the support column is arranged in the central area of the #-shaped steel frame, the support column is welded and fixed to the groove wall of the receiving groove, and a plurality of studs are welded to the outer circumferential surface of the support column; and the column leg reinforcing pier is poured from a plurality of second steel bars and concrete, and wrapped at the bottom of the support column, and the second steel bars comprise a plurality of longitudinal bars which are arranged at the periphery of the support column and a plurality of stirrups connected with the plurality of longitudinal bars.

The invention discloses an anti-seismic reinforced concrete frame bent frame of a main factory building of a thermal power plant and a construction method thereof, which solves the problem that the existing reinforced concrete frame bent frame of a main factory building of a thermal power plant has weak seismic capacity. Including the reinforced concrete column of bent frame A column (1), the reinforced concrete column of frame B column (2) and the reinforced concrete column of frame C column (3), the reinforced concrete column of frame B column (2) and the frame C column of reinforced concrete ( 3) A frame grid (4) is arranged between them, and channel steel shear keys (8) and horizontal bars (9) are respectively arranged at the connection between the turbine platform (7) and the reinforced concrete column (2) of the frame column B, The herringbone steel support (5) is set in the frame grid (4), and the stiff type steel bar (10) is set at the top of the reinforced concrete column (2) of column B of the frame and the reinforced concrete column (3) of column C of the frame. . The invention improves the structural ductility of the reinforced concrete frame bent frame of the main factory building of the thermal power plant under a large earthquake.