538 results about "Shaped beam" patented technology

The invention discloses a composite material T-shaped beam forming method in the technical field of aviation, a forming die, a laying die and a bottom face forming die which are arranged in a split mode and can be combined are adopted, forming is conducted through a secondary hot-pressing curing process, and the method comprises the following steps that S1, preforming and R corner prefabricating are conducted, the independently-prefabricated prepreg core material is positioned in a T-shaped beam R-angle area formed after the prepreg core material and the T-shaped beam R-angle area are oppositely combined; and S2, first-time mold closing and pre-curing are carried out, specifically, the laying mold and the forming mold are oppositely closed, lateral auxiliary positioning is carried out through the bottom face forming mold, locking and fixing are carried out through a positioning pin and a clamping piece, and first-time hot-pressing curing is carried out on a combined body obtained after mold closing. According to the method, the independently prefabricated core material which is subjected to heat-sealing, pressing and pre-curing is filled in the R-angle area, and a secondary hot-pressing process of pre-curing and final curing is matched, so that sufficient pressure transmission and tight laying of the R-angle area are ensured, the defects of layering, bridging and the like are effectively avoided, and the percent of pass of nondestructive testing of products is remarkably improved.

The invention relates to the technical field of beam feeding of special-shaped beams, in particular to an F-beam feeding method which comprises the following steps that S1, a heightening joint is additionally arranged below each reverse supporting assembly of a middle supporting leg, and a lengthened main truss is installed on a main beam; s2, a block C is conveyed forwards, and after the front end of the block C penetrates through a rear supporting leg, a front hoisting trolley is controlled to be aligned with the hoisting point position of the front end of the block C; s3, the front crane carriage lifts the front end of the C block, and the distance between the highest position of the shoe-shaped gold ingot cross beam and the bottom face of the C block is larger than or equal to 10 cm; s4, the front hoisting trolley and the rear beam transporting trolley move forwards together, and the height from the highest position of the shoe-shaped gold ingot cross beam to the bottom face of the block C is kept to be larger than or equal to 10 cm all the time; s5, the rear hoisting trolley hoists the rear end of the block C until the block C is horizontal; and S6, the front hoisting trolley and the rear hoisting trolley jointly hoist the beam to move forwards to complete beam feeding. According to the beam feeding method, the risk that the C block collides with the shoe-shaped gold ingot cross beam is reduced.

The invention discloses an I-shaped column-full dry type connection RC beam column joint and a connection method, and belongs to the technical field of building structure engineering. The joint comprises a prefabricated I-shaped column, a stepped beam, a shear connector and a U-shaped connecting steel plate. A long bracket and a short bracket are respectively arranged at the top and the bottom of the I-shaped column; the end part of the step-shaped beam is in an inverted step shape and is provided with an extending section; the shear connector is a long-strip-shaped steel member provided with a screw rod; and the U-shaped steel plate is provided with screw holes which are respectively matched with the shear connector and the beam end screw. During connection, rapid assembly is achieved in the mode that the brackets of the upper column and the lower column are in lap joint, shear key grooves are interlocked, the shear connectors penetrate into the square holes, the beam bodies are supported on the combined brackets, and finally the U-shaped steel plates are used for anchoring. According to the joint, complete dry type operation is achieved, cast-in-place concrete and steel bar welding are not needed, the construction efficiency is remarkably improved, wet operation is reduced, loads can be borne after installation, the overall performance is reliable, and the development requirement of fabricated buildings is met.

The invention discloses a tunnel segment joint quality high-precision detection method and system based on an image stabilization mechanical arm. The device comprises a circular track patrol platform, the self-adaptive image stabilization mechanical arm and a macro-micro fusion detection module. The circular rail cruising platform comprises a cruising platform pedestal and a guide rail, the guide rail is installed on an H-shaped beam at the tail of the shield tunneling machine through a cushioning connecting piece, the guide rail is of a circular structure and is located in the shield tunneling machine, and the cruising platform pedestal is arranged on the guide rail and can move in the circumferential direction of the guide rail; one end of the self-adaptive image stabilization mechanical arm is mounted on the cruising platform pedestal, and the macro-micro fusion detection module is mounted at the other end of the self-adaptive image stabilization mechanical arm, so that the macro-micro fusion detection module synchronously moves along with the cruising platform pedestal and is arranged facing a joint of a segment to be mounted and a mounted segment. The invention relates to the technical field of tunnel construction, and can solve the problems of low efficiency, high risk and lagging of manual detection and large interference, low precision and poor flexibility of fixed equipment detection in the prior art.

The beam and slab prefabrication integrated production line comprises a steel bar machining unit, a movable mold table, a mold closing mechanism, a concrete pouring unit, a steam curing unit and a finished product transferring unit which are sequentially arranged along a ground rail. A T-shaped steel reinforcement framework is formed by the steel reinforcement machining units, a pouring area is defined by the strip-shaped mold table, the T-shaped mold plate and the side mold plate through the unique structural design of the movable mold table, and the side mold plate can move along the oblique sliding base. The mold closing mechanism realizes mold closing through a hydraulic rod; the finished product transfer unit transfers finished products through cooperation of a hydraulic supporting rod and a transfer trolley. The production line effectively solves the problems of large demolding friction, high energy consumption, low efficiency and the like of a traditional T-shaped beam plate prefabrication production line, can improve the prefabrication quality and production efficiency of the T-shaped beam plate, and is suitable for large-scale bridge engineering construction.

The invention discloses a superconducting magnetic levitation U-shaped track beam and a preparation method thereof, and belongs to the technical field of bridge engineering.The superconducting magnetic levitation U-shaped track beam is used for running of a magnetic levitation train with superconducting coils arranged on the two sides of a train body, and the track beam comprises a plurality of track beam sections which are sequentially spliced in the longitudinal direction; each track beam section comprises a main beam body and two side plates arranged on the two transverse sides of the main beam body respectively, the two side plates and the main beam body are integrally formed to form a U-shaped beam body structure, a maglev train can run in the U-shaped beam body, mounting grooves are formed in the inner side wall faces of the two side plates and used for mounting ground coils, and the invention further provides a preparation method of the superconducting maglev U-shaped track beam. The superconducting magnetic levitation U-shaped track beam is formed by splicing the multiple track beam sections, the main beam body and the two side plates in the track beam sections are integrally formed, the number of joints of the track beam is greatly reduced, the smooth performance of the track beam is guaranteed, and the overall stability of a magnetic levitation track system is improved.

The invention belongs to the technical field of pultrusion, and discloses a J-shaped beam forming method based on a pultrusion RTM process and a J-shaped beam. The invention discloses a J-shaped beam forming method based on a pultrusion RTM process. The J-shaped beam forming method comprises the steps that a laying layer structure of a J-shaped beam is set; drawing the fiber fabric according to the layering structure; drawing the fiber fabric into a preforming mold for preforming; and pulling the pre-formed fiber fabric into a forming mold for final forming. A traditional autoclave forming process of the J-shaped beam is changed into a pultrusion forming process, a laying layer structure of the J-shaped beam is designed according to the structural stress and thickness of the J-shaped beam and is converted into a yarn fiber fabric of a pultrusion RTM process, and the yarn fiber fabric is subjected to preforming and final forming through a preforming mold and a forming mold. And the repeated heating and cooling process in the curing process in the autoclave forming process is simplified, and the production efficiency of the J-shaped beam is improved. The J-shaped beam disclosed by the invention has the advantages of net profile boundary and no need of additional processing.

The invention relates to the technical field of sensors, and provides a six-dimensional force and torque force sensor and a preparation method thereof.The six-dimensional force sensor is of a disc-shaped structure and comprises an outer supporting ring, an inner mass block and eight elastic beams connected between the outer supporting ring and the inner mass block; wherein the eight elastic beams comprise a first elastic beam and a second elastic beam which are alternately arranged around the inner mass block, the first elastic beam is a straight beam, the second elastic beam is a special-shaped beam, and a strain gauge preset on the main surface of each elastic beam responds to the strain of the elastic beam to generate a measurement signal; and the force and / or the torque applied to the inner mass block or the outer support ring can be determined according to the measurement signal. Due to the fact that the different elastic beams are different in shape and structure, the strain gauges are preset on the elastic beams of different types and positions, and the bridging mode is set, the output of each Wheatstone bridge is only sensitive to the force or the moment of force in the changed direction and is not sensitive to the force or the moment of force applied in other directions, and the decoupling capacity of the sensor structure is improved to the maximum degree.

The invention provides a construction method for installing a large-span special-shaped beam curved template system, and belongs to the technical field of building construction. According to the construction method, accurate three-dimensional modeling is conducted on the shape of a special-shaped beam through a special-shaped curved surface parametric modeling algorithm, and material prefabrication is guided; eight oscillation excitation devices and twelve vibration monitoring devices are optimally arranged by using experimental design and a graph theory analysis method to form a dynamic monitoring network, vibration response data are analyzed in real time by using a wavelet transform monitoring algorithm, and the energy ratio of each frequency band is calculated as a quality evaluation index. A game optimization model is established, and according to different ranges of energy ratios, the support spacing is automatically adjusted, a back ridge fixing mode is combined or a supporting system is reinstalled, so that a comprehensive quality assurance system of accurate geometric modeling-dynamic state monitoring-intelligent parameter adjustment is constructed. The technical problem that the installation quality of a large-span special-shaped beam curved template system is difficult to guarantee is solved.

The invention relates to a synchronous loading and self-adaptive compensation system for a fatigue test and a working method thereof.The synchronous loading and self-adaptive compensation system for the fatigue test is characterized in that the synchronous loading and self-adaptive compensation system comprises a T-shaped beam capable of being connected with a fatigue testing machine, the two lower side portions of the T-shaped beam are connected with pentagonal steel plates respectively, and the pentagonal steel plates are connected with the T-shaped beam. A plurality of groups of loading units are mounted between the two pentagonal steel plates, each loading unit comprises a hard shell and a rotating disc rotationally connected with the hard shell, a driving mechanism for driving the rotating disc to swing and rotate is arranged on the hard shell, a spherical hinge is fixedly mounted on the rotating disc, and the rotating disc is fixedly connected with the driving mechanism. The lower part of the spherical hinge is connected with an electric telescopic rod which can be electrically controlled to stretch out and draw back, and the lower end of the electric telescopic rod is provided with a loading block acting on the test piece; the problems of'void impact 'and'loading eccentricity' are fundamentally solved, and efficient, accurate and safe multi-test-piece synchronous fatigue test is realized.

The invention relates to the technical field of bridge jacking construction, in particular to a large-area special-shaped continuous beam asynchronous jacking system and a jacking construction method. According to the method, jacking force is pre-distributed based on a finite element model and a historical data training machine learning algorithm, and high-precision deformation coordination control is achieved through a hydraulic jack group and a multi-sensor cooperative monitoring network (including displacement, strain, inclination angle and deflection parameters) placed on a special-shaped beam in combination with an iteratively optimized graded jacking and dynamic compensation strategy. Comprising the steps that the total jacking height is constructed in a graded mode, and in each stage of jacking, output of all fulcrums is adjusted in real time through a PLC so that the displacement synchronization error can be kept to be smaller than or equal to 0.5 mm; when it is monitored that local stress exceeds the limit, a dynamic compensation mechanism is triggered, and secondary balance of the load is achieved by jacking and accelerating an overstress point and jacking adjacent fulcrums in a reinforcement mode. According to the method, the problems of stress concentration, local support disengaging and the like caused by uneven stress in the jacking process of the special-shaped continuous beam are solved.

An antenna system steerable in any direction and methods of use are provided. In an embodiment, the antenna system comprises a substantially ellipsoid-shaped shell body and a plurality of cells coupled to the body, wherein each cell comprises a conductive material. In an embodiment, the shell body comprises a metasurface. In an embodiment, the antenna system further includes a plurality of switches coupled to the plurality of cells, wherein each switch is configured to change its coupled cell between reflective, transmissive, and absorptive states. The antenna system further includes a feed radiator located at or around the center of the shell body; a radio coupled to the feed; and a processor coupled to the feed, radio, and the plurality of switches, wherein the processor is configured to produce a shaped beam by controlling a subset of the plurality of switches.

The cantilever type retaining wall comprises a plurality of waste L-shaped beams, the sides, with flanges, of the waste L-shaped beams face a mountain, the bottoms of the waste L-shaped beams are embedded into the position below a foundation by a set depth, and the space between the waste L-shaped beams and the mountain is filled and tamped through lateral filling soil; the adjacent ends of all the waste L-shaped beams are fixedly connected through connecting transverse partition plates to form a retaining wall, and settlement joints are arranged on the retaining wall at equal intervals. The invention further discloses a construction method of the cantilever retaining wall for recycling the waste T-shaped beams. According to the method, the T-beam of the abandoned bridge can be reused, pollution of construction waste to the environment is reduced, the retaining wall built by the abandoned T-beam serves as a structure for supporting a natural or artificial slope mountain body to be free of collapse so as to keep the stability of a soil body, and great economic benefits and ecological benefits are achieved.

The invention discloses a holosymmetric four-mass MEMS gyroscope which comprises four sensitive mass block coupling structures which are arranged in a central symmetry manner, and four first U-shaped beams, four n-shaped beams and a cross-shaped coupling structure which are arranged in a central symmetry manner and are connected with the four sensitive mass block coupling structures, compared with the prior art, the four sensitive mass block coupling structures are designed compactly and symmetrically, so that the sensitivity can be effectively improved, and thermally induced drift can be effectively reduced. The driving mode and the working mode are separated through the specific coupling mechanism, so that frequency coupling is avoided, and environmental vibration interference is reduced. And meanwhile, the symmetry of the structure is beneficial to uniform distribution of thermal stress or mechanical stress, so that zero drift caused by temperature change is inhibited.

The invention provides a friction stir welding aluminum alloy I-shaped beam pressure limp bearing capacity design method which comprises the following steps: acquiring key parameters of a friction stir welding aluminum alloy I-shaped beam test piece, including section size information, structural design parameters, material mechanical property indexes, welding seam parameters and geometric initial defects; calculating dimensionless parameters based on the key parameters; calculating a pressure limp bearing capacity theoretical value of the transverse stiffening rib-free aluminum alloy I-shaped beam when the transverse stiffening rib-free aluminum alloy I-shaped beam is subjected to concentrated load in the midspan according to European specifications or an American aluminum coordination design manual; real pressure limp bearing capacity data of the stirring friction welding aluminum alloy I-shaped beam are obtained through experimental testing and finite element simulation, and a correction coefficient is obtained through regression analysis fitting based on the real pressure limp bearing capacity data and dimensionless parameters; and the correction coefficient is multiplied by a standard theoretical value, or an American standard formula based on least square method regression correction is adopted, and the pressure limp bearing capacity design value of the friction stir welding aluminum alloy I-shaped beam is obtained.

The invention relates to the technical field of MEMS (Micro Electro Mechanical System) gyroscopes, and discloses an in-plane rotating MEMS gyroscope, which comprises two driving frames distributed along a second direction; the driving connecting frame is located between the two driving frames; the two coupling frames are distributed in the first direction and are both located in the driving connection frame; each coupling frame is provided with four orthogonal correction electrodes which are symmetrically distributed relative to the first direction and are antisymmetrically distributed relative to the second direction; the two detection frames are located between the two coupling frames; each detection frame is provided with two detection electrodes which are distributed in an anti-symmetric manner relative to the first direction; and the first inclined U-shaped beam can drive the two detection frames to do reverse reciprocating motion along the second direction in the detection mode. According to the in-plane rotating MEMS gyroscope disclosed by the invention, the structure of the MEMS gyroscope is optimized to improve the consistency of motion in a driving mode and inhibit coupling errors, so that the detection performance of the gyroscope is improved, and the in-plane rotating MEMS gyroscope is suitable for application scenes with higher requirements.

The invention provides a construction method for load decomposition and transmission of a special-shaped beam curved template, and belongs to the technical field of building construction.The load change of each node of the curved template is monitored in real time by establishing a load jump identification matrix, and a supporting system abutting stability matrix is constructed to evaluate the bearing capacity of each abutting point; a graph theory shortest path algorithm is utilized to optimize a load transmission path and form a fluctuation evaluation vector, a prestressed reinforcement tension stability control matrix is constructed to realize symmetrical batch tension, and support system parameters and a tension program are adjusted in real time through a load transmission dynamic balance equation set. And a load transmission effect evaluation vector is established to perform continuity and controllability evaluation on an overall transmission path, and when the transmission efficiency is lower than a set value, the load distribution and path optimization program is executed again, so that the technical problem of instability of a support system caused by uncontrollability of the load transmission path in the construction process of the special-shaped beam curved template is solved.

The utility model provides a device for correcting roundness deviation of a steel pipe, which comprises an inner frame, a plurality of supporting rods and a plurality of pipe expanding frames, the inner frame, the supporting rods and the pipe expanding frames are sequentially connected from inside to outside, each pipe expanding frame comprises an inner sleeve rod and an arc-shaped beam, one end of each inner sleeve rod is telescopically connected with the corresponding supporting rod, the other end of each inner sleeve rod is connected with the corresponding arc-shaped beam, and each arc-shaped beam is connected with the corresponding supporting rod. And the outer edges of the plurality of arc-shaped beams belong to the same circle. The steel pipe coiling device is reasonable in structural design form, and can adapt to coiled steel pipes with different diameters by selecting and matching the inner frames with different sizes and adjusting the stretching and retracting of the inner sleeve rods.

The invention belongs to the technical field of T-shaped beam top plate reinforcement cage forming, and discloses a T-shaped beam top plate reinforcement cage welding device which comprises a rack, a long rib positioning mechanism, a stepping mechanism, a mesh moving mechanism and a welding mechanism. The supporting part is used for supporting all the full-length ribs; the stepping mechanism is movably arranged on the rack in the second direction, and the stepping mechanism can clamp the full-length rib supported by the supporting part to move in the second direction; the mesh moving mechanism is movably arranged on the rack in the second direction, and the mesh moving mechanism is used for moving the single reinforcing mesh located on the full-length ribs; the welding mechanism is arranged on the rack and used for welding the full-length ribs and the single reinforcing mesh moved in place by the mesh moving mechanism. The T-shaped beam top plate reinforcement cage can be automatically formed, and the production efficiency of the T-shaped beam top plate reinforcement cage is improved.

The invention provides a composite paddle D-shaped beam core mold forming device and method. The device comprises a lower mold, an upper mold, a base, a left side positioning plug pin and a right side positioning plug pin. The lower die is fixed to the middle position above the base, the upper die is located above the lower die and detachably connected with the lower die, the end of the lower die is provided with a left positioning plug pin and a right positioning plug pin which are used for preventing the core die from moving in the spanwise direction when the core die is cured, and the left positioning plug pin and the right positioning plug pin are symmetrical about the vertical bisector of the device. The left positioning plug pin and the right positioning plug pin are arranged at the end of the lower die, so that the core die can be prevented from moving in the spanwise direction when the core die is cured, the core die cannot be seriously deformed due to extrusion, D-shaped beam prepreg cannot be folded and bent, and the curing forming quality is high.

The present application relates to the field of arc-shaped beam formwork erection and installation, and discloses an arc-shaped beam formwork construction tool and a construction method of the arc-shaped beam. The tool comprises a bottom formwork and a top formwork, a plurality of standard formworks fixed between the top formwork and the bottom formwork, a rotating insertion rod assembly for connecting two adjacent standard formworks, a steel wire rope assembly connected to all the standard formworks on the same side of the arc-shaped beam, and a tension bolt assembly connecting the side formworks on both sides of the arc-shaped beam in the thickness direction. The arc-shaped beam formwork of various sizes and various radii is assembled and spliced by the standard formworks, the rotating insertion rod assembly and the steel wire rope assembly, which has the characteristics of convenience, small size, easy installation, reduced material cost and high practicability. In addition, the device is convenient to assemble, can ensure the visual integrity of the arc-shaped beam during construction, improves the construction quality, and has low technical requirements for the workers.

The utility model relates to the technical field of tower barrel sections for wind power generation, discloses a U-shaped lifting hook for lifting a barrel section, and solves the problems that after a U-shaped beam enters the barrel section, when the U-shaped beam is lifted, the U-shaped beam slightly shakes, and the barrel section has the risk of falling off. Moving plates and rack plates are mounted at the upper ends of the two extrusion blocks, gears are meshed with one sides of the rack plates, rotating shafts are arranged on the gears, connecting columns and rotating discs are mounted at one ends of the rotating shafts, and the connecting columns are driven to rotate through the rotating discs, so that the rotating shafts are driven to rotate, the two gears rotate, and the gears drive the rack plates to move downwards; and thus, the movable plate is driven to move downwards, the extrusion block moves downwards, the extrusion block extrudes the upper side of the outer surface of the shell ring, the shell ring is fixed between the extrusion block and the lower beam, and the situation that the shell ring falls off due to shaking of the U-shaped beam is prevented.

The utility model provides a wave-shaped beam plate forming machining device which comprises a first machining area and a second machining area, and a supporting sliding part is arranged between the first machining area and the second machining area. A push plate moving towards the second machining area is arranged on the first machining area. Positioning columns are arranged at the two ends of the side, away from the first machining area, of the second machining area correspondingly, and the distance between the two positioning columns is smaller than the width of a steel plate used for producing the corrugated beam plate and larger than the width of the formed corrugated beam plate. The semi-finished product in the first machining area is pushed to the next machining area through the push plate, and then the corrugated beam plate can pass through the position between the two positioning columns by means of the width change of the bent semi-finished product, so that automatic feeding and discharging of the corrugated beam plate are completed. And meanwhile, hidden dangers to personal safety of workers due to the fact that hands or tools of the workers stretch into the machine in the operation process are avoided.

The application provides a pipeline intelligent hoisting device and method based on accurate orientation regulation, and relates to the technical field of municipal pipeline construction. The device comprises a hoisting frame, the bottom corners of the hoisting frame are provided with support column structures, four groups of hydraulic support rods are fixedly arranged on the bottom sides of the hoisting frame, the telescopic ends of the hydraulic support rods are rotatably provided with H-shaped wheels, two groups of L-shaped beam frames are fixedly arranged on the top of the hoisting frame, and the middle part of the L-shaped beam frame is slidably provided with a sliding seat in cooperation with a guide rail. The application is provided with a sliding seat, which provides stable movement control function, can move the pipeline to the delivery position according to the need, and can adjust according to the installation condition of the pipeline. According to the angle requirement, the extension range of different hoisting cables can be controlled to adjust the horizontal angle of the gripper, thereby realizing the adjustment of the laying angle of the pipeline, and solving the problem of inconvenient stable control of the existing hoisting device.

The utility model discloses a trough beam structure capable of separating pedestrians from vehicles, belongs to the field of bridge engineering, and solves the problems that the clearance below a bridge is difficult to meet the flood discharge requirement after the bridge is level-crossed with a dike, the noise and tail gas pollution of a motor vehicle lane is serious, and the pedestrian experience feeling is poor. A channel beam is of a channel structure formed by a bottom plate and web plates on the two sides of the bottom plate, cantilever plates are arranged on the two sides of the channel beam respectively, and bridge railings are arranged on the outer sides of the cantilever plates. The bottom plate is used for arranging a motorway, and the cantilever plate is used for arranging a sidewalk. By adopting the through channel beam structure and the cantilever slab overhanging structure, the height of the bridge building is effectively reduced, navigation and flood discharge clearance under the bridge are ensured, and roads on two banks do not need to be lifted; the webs on the two sides of the channel beam are used for conducting hard isolation on a sidewalk and a motorway, separation of people and vehicles is achieved, potential safety hazards are reduced, and noise and tail gas are isolated.

This invention relates to the field of novel materials, specifically a novel metamaterial exhibiting both multi-stable state and negative Poisson's ratio properties. It comprises a concave hexagonal frame, two arc-shaped beams positioned on the upper and lower sides of the frame's inner cavity, and a vertical rod. The two arc-shaped beams are fixedly connected to the upper and lower ends of the vertical rod via their respective central portions. When the structure is subjected to a vertical compressive load, the frame's diagonal bracing rotates inward, contracting and compressing the ends of the arc-shaped beams, generating a significant negative Poisson's ratio effect. This process forces the arc-shaped beams to bend and deform towards the center, accompanied by energy dissipation. When the displacement reaches a critical threshold, the arc-shaped beams buckle and overturn, switching to a steady state. This invention, through specific geometric configurations and differentiated material layouts, achieves morphological self-repair after impact and reuse under low-intensity conditions. This metamaterial can be arranged as a two-dimensional periodic array as a unit cell.

The utility model discloses a prefabricating device of a pi-shaped beam plate, which comprises an outer side mold and an inner tube mold, a concrete pouring cavity is arranged between the inner tube mold and the outer side mold, and the inner tube mold is connected with the outer side mold through a support. The inner tube mold is provided with a bottom mold and at least two box-type bodies, each box-type body is composed of a top inner mold and four side inner molds, corner molds are arranged between the adjacent side inner molds and between the side inner molds and the top inner mold, the side inner molds are hinged to the bottom mold, the bottom mold is firmly fixed to the ground through foundation bolts, and the adjacent top inner molds are connected through connecting plates. The top inner mold, the side inner mold and the box-type body are arranged to form a closed box-type structure, the vertical linkage rod and the horizontal linkage rod are arranged to be matched with the hydraulic jack to form a hydraulic connecting rod type detachable split inner mold, and the situation that a mold plate is deformed due to high temperature and demolding adsorption force is generated is avoided.

The invention discloses a self-resetting damper based on mechanical metamaterial axial pressure driving transverse cooperative instability. The damper is composed of metamaterial units arranged periodically, and each unit comprises inner left / right arc-shaped beams with opposite concave surfaces, outer left / right arc-shaped beams with opposite convex surfaces, inner / outer upper and lower fixing plates, a vertical supporting beam and left / right transverse connecting beams. The end parts of the inner and outer left / right arc-shaped beams are connected with inner / outer upper and lower fixing plates which are arranged in parallel; the middle of the vertical support beam is connected with the inner upper-lower fixing plate; the inner and outer arc-shaped beams are connected through left / right transverse connecting beams. The outer beam is bent inwards under shaft pressure, and the inner beam is driven to move inwards cooperatively to generate jumping instability. The multiple units are connected in series, and energy is consumed through continuous instability. The damper can be made of steel or a carbon fiber composite material, and the strength, rigidity and energy consumption characteristics can be customized by adjusting the geometric parameters of the arc-shaped beam and the topological configuration of the unit. In the deformation process, all components are kept in an elastic state, and the excellent self-resetting capacity is achieved.

The invention relates to the technical field of bridge engineering, in particular to a mixed ultra-high performance concrete continuous structure system bridge and a construction method thereof. The mixed type ultra-high performance concrete continuous structure system bridge comprises bridge piers and a bridge superstructure, and the bridge superstructure comprises a web hollowed-out section box girder and a solid web section box girder; the bridge adopts a mixed large-span prestressed ultra-high performance concrete continuous structure system bridge, so that the weight of the bridge is reduced, and the span capacity of the bridge is greatly improved; the structure formed by the first pi-shaped beam, the groove beam and the stand column is designed, the construction bending moment is balanced in combination with external prestressing force, a certain thickness of each part is guaranteed, the problems of local buckling, shear instability and overall instability are effectively avoided, and the structure is more stable for the cross section distortion problem. Prestressed tendons are reasonably arranged and pre-tightening force is applied by means of the active constraint effect of prestress, so that buckling deformation of the cross section is effectively restrained.

The invention provides an installation method of a back ridge reinforcing system, and belongs to the technical field of building construction.The installation method comprises the steps that a bent arc secondary keel matched with the curvature of a bent arc section is manufactured through a numerical control hot bending forming or thin plate lamination cold bending process, and a frame body supporting system verified through a pre-pressing test is built; a plane secondary keel and a composite back ridge with a tenon-and-mortise structure interface are installed, a fluid-solid coupling numerical model is established to simulate the concrete pouring process and optimize back ridge arrangement, and a continuous load transmission path from a bottom die to a frame body supporting system is formed through the bent arc secondary keel and the tenon-and-mortise structure interface. A layered symmetrical pouring mode is adopted, vertical rod settlement and back ridge strain are monitored in real time, and the technical problem that a formwork deforms and is unstable due to the fact that the space curved surface load of a special-shaped beam curved section formwork system is difficult to accurately transmit to a plane supporting system is solved.