16 results about "Hogging" patented technology

The invention provides a counterweight difference adjustment method for hogging moment area jacking of a special-shaped multi-girder steel-concrete composite beam, which comprises the following steps of: establishing a finite element model of the special-shaped multi-girder steel-concrete composite beam, and arranging two ends and the middle part of the special-shaped multi-girder steel-concrete composite beam on a beam column; performing jacking height simulation of different numerical values on the special-shaped multi-girder steel-concrete composite beam at the middle supporting point for many times to obtain a first bridge deck stress result at the middle supporting point; carrying out balance weight difference adjustment finite element simulation on the basis of the first bridge deck stress result, and applying a balance weight along the line type of the main beam to adjust the pre-compressive stress of the bridge deck at the middle fulcrum of the main beam so as to achieve a design target; and the concrete bridge deck is constructed on the basis of counterweight data obtained through counterweight difference adjustment finite element simulation. By establishing a finite element model and carrying out multi-group jacking height simulation and subsequent counterweight difference adjustment simulation, the stress state of the bridge deck at the middle fulcrum of each main beam under different working conditions can be accurately determined. The counter weight is applied on the basis, so that the stress nonuniformity caused by a special-shaped structure and a multi-girder system can be effectively made up, the pre-compressive stress of the bridge deck at the middle supporting point of each girder is more uniform, and the design goal is accurately achieved.

The invention discloses a corrugated steel web box girder hogging moment area shear nail push-out test device and method.The corrugated steel web box girder hogging moment area shear nail push-out test device comprises a corrugated steel web combined box girder, a loading frame, a pulley support, a jack and a displacement measuring device, and a reinforced concrete plate of the corrugated steel web combined box girder is connected with a corrugated steel web through shear nails; the cross beam of the loading frame applies symmetrical vertical pressure to the reinforced concrete slab through the jack, the stand column applies horizontal push-out force to the lower sliding support through the jack, the reinforced concrete slab is pushed out of the top face of the steel box girder, and a shearing force sliding curve is recorded through the displacement measuring device and the pressure sensor. Through a two-way loading mode of first vertical and then horizontal, the shear bearing capacity of the shear nail under the actual cracking condition of a hogging moment region concrete slab is more effectively simulated, a test device for only applying one-way force to the shear nail is improved, the real stress condition of the continuous beam bridge hogging moment region is met, and the displacement measurement device is simple in structure, stable in clamping and high in practicability. The relative slippage of the shear nails is effectively measured.

The invention discloses a composite beam plastic flexural capacity correction calculation method considering interface slippage. The method is suitable for a hogging moment area of a steel-concrete composite beam reinforced by an external prestress carbon fiber reinforced composite material rib. The method comprises the following steps: firstly, determining basic static boundary parameters and a shear connector constitutive model; in the iterative calculation, solving a temporary bearing capacity by utilizing an axial force and moment balance equation, and calculating interface slippage along the beam length and a deformation loss item at the support based on internal force distribution; then determining a rigidity degradation coefficient according to the average slip amount, and dynamically reducing the static yield bending moment to reconstruct the plastic hinge length; and finally, constructing a corrected deformation coordination equation, deducting a deformation loss item in geometric deformation calculation to obtain the real elongation of the in-vitro CFRP rib, and updating a stress parameter until a result is converged. According to the method, by introducing a deformation loss item and a rigidity degradation mechanism, deviation caused by traditional rigid connection assumption is corrected, and accurate prediction of the ultimate bearing capacity is achieved.

The invention provides a steel-concrete composite beam hogging moment region rigidity degradation rule calculation method and a storage medium, and belongs to the technical field of computer-aided calculation. The method comprises the following steps of S100, determining random fatigue loads borne by a hogging moment area of the steel-concrete composite beam, and calculating the amplitude S and the amplitude distribution rule of each fatigue load; s200, performing curve fitting on the amplitude distribution rule of the fatigue load, and determining a probability density function of the amplitude of the fatigue load; s300, determining the fatigue life of the hogging moment area of the steel-concrete composite beam; s400, the static load ultimate bearing bending moment of the hogging moment area of the steel-concrete composite beam is determined; s500, determining a rigidity reduction value of the hogging moment area of the steel-concrete composite beam during fatigue failure; and S600, calculating the rigidity degradation rule of the steel-concrete composite beam under the random fatigue load. According to the method, the rigidity degradation process of the hogging moment area of the steel-concrete composite beam can be calculated and predicted in advance, and a theoretical basis is provided for maintenance and repair of a bridge.

The invention relates to the technical field of underground engineering construction, in particular to a prefabricated station jacking method using novel longitudinal beam connection, which comprises the following steps of: prefabricating prefabricated longitudinal beam single-section components according to station structure blocks, and sequentially and integrally jacking the prefabricated longitudinal beam single-section components in a ring-dividing manner under the assistance of a temporary support system; pre-stressed anchor cables are arranged in reserved anchor cable tensioning holes in the hogging moment stress areas of the prefabricated longitudinal beam single-section components in a penetrating mode and tensioned to the designed pre-stress, and the hogging moment stress areas of the prefabricated longitudinal beam single-section components form a whole; the pre-embedded stress steel plates of the prefabricated longitudinal beam single-section components of the adjacent rings are connected in the joint areas, so that the sagging moment stress areas of the multiple prefabricated longitudinal beam single-section components form a whole; and a wet joint is poured in the joint area. The method has the advantages that the construction efficiency is improved; the structural safety is enhanced; the engineering cost is reasonably controlled; the method adapts to complex geological conditions; green construction is promoted; the construction efficiency is improved, the cost is reduced, and the structural safety is enhanced.

The utility model relates to the technical field of bridge construction, in particular to a hogging moment tensioning beam body embedded pipeline grouting device. According to the hogging moment tensioning beam body embedded pipeline grouting device, the device can be embedded in the beam body construction process, the upper grouting pipe is changed to be vertically upward to be exposed out of the top face of a beam body under the action of the conical disc, grouting is convenient, and construction safety is improved. A hogging moment tensioning beam body embedded pipeline mud jacking device comprises a beam body and cover plates, and the left cover plate and the right cover plate are placed on the beam body. The device is pre-buried in the construction interior of a beam body, then the upper grouting pipe is vertically and upwards exposed out of a bridge floor under the action of the conical disc, and after the bridge construction is completed, the interior of the corrugated pipe can be grouted through the upper grouting pipe, so that the device can be pre-buried in the construction process of the beam body, and the construction efficiency is improved. And the upper grouting pipe is changed to be vertically upwards exposed out of the top surface of the beam body under the action of the conical disc, so that grouting is facilitated, and the construction safety effect is improved.

The application relates to the technical field of finite element data processing, in particular to a camber rib reverse assembly and closing precision prediction method based on finite elements. The method comprises the following steps: acquiring measured data and environmental data of different sampling time points of each day under different assembly progress of the camber rib steel material, determining the fluctuation abnormality degree based on the numerical fluctuation of the measured data of the current assembly progress, determining the closing abnormality degree of different measured data of the closing opening based on the point cloud data record matching under different assembly progress and the change of the measured data and the wind deflection angle, finally, combining the fluctuation abnormality degree and the closing abnormality degree, screening out abnormal data from the measured data to obtain normal data, and realizing the finite element precision prediction based on the normal data. The numerical fluctuation of the measured data itself and the fluctuation situation influenced by the environmental factors are used to screen out abnormal data information and retain normal data information, so that the precision of the finite element model prediction data is higher, and the accuracy is stronger.

The invention belongs to the technical field of bridge engineering construction, and provides a bridge hogging moment searching device and method. The device comprises a cross beam, walking wheels, a supporting assembly, a vertical sliding vertical plate, an elastic jacking assembly and a guide assembly, the elastic jacking assembly drives the guide assembly to be attached to the bottom of a beam plate in a self-adaptive mode, when the device passes through a tensioning toothed plate, accurate positioning is achieved through downward pressing and rebounding, and the supporting assembly can achieve switching of device moving and positioning locking. The construction method comprises the steps of beam and slab erection, wet joint construction, hogging moment tensioning point searching, prestress tensioning, system conversion and the like, and the device can serve as a tensioning alignment reference after positioning. A worker does not need to enter a high-altitude narrow space for operation, potential safety hazards are reduced, the construction process is simplified, and hogging moment tensioning quality and construction efficiency are improved.

The utility model discloses a simple semi-finished stirrup transfer device which comprises a supporting base. The moving wheels are mounted at four corners of the lower end of the supporting base; the supporting rods are symmetrically connected to the two sides of the supporting base; a plurality of placing rods, wherein each placing rod is vertically connected to the supporting rod; and the anti-falling pieces are connected to the end parts of the placing rods. The semi-finished stirrup can be easily transferred from the storage area to the final processing and manufacturing area, so that the semi-finished product storage area is separated from the final processing and manufacturing area, and the semi-finished stirrup products with gradually-changed hogging moment toothed plates of T-beams are classified, stacked and stored in a centralized manner; standardized construction is achieved, the T-beam hogging moment toothed plate gradual change stirrup semi-finished product is better protected, and the situation that in the ground storage process, due to the fact that the T-beam hogging moment toothed plate gradual change stirrup semi-finished product is placed in a mess, rusting and corrosion of the T-beam hogging moment toothed plate gradual change stirrup semi-finished product are easily caused, and the service life and the quality are affected is avoided.

The utility model relates to the technical field of hogging moment steel beams, in particular to a controllable hogging moment steel beam for a cast-in-place continuous section at the pier top of a prefabricated T beam, which comprises a rib body, the rib body comprises a straight rod, and a hook section is arranged on the surface of the straight rod; and a reinforcing mechanism is arranged on the surface of the straight rod. Through the arrangement of the first connecting block and the second connecting block, the connection between the screw rod and the straight rod and the connection between the screw rod and the hook section can be positioned, the screw rod penetrates through the first connecting block and the second connecting block, and the locking between the first connecting block and the second connecting block can be realized in cooperation with the action of the screw sleeve; therefore, the straight rod and the hook section can be reinforced, the straight rod and the hook section are not prone to deformation, the effect of adjusting prestress can be achieved, the strength of the straight rod and the hook section is better, the bending resistance, shearing resistance and other capacities of the hogging moment steel beam can be improved, and the bearing capacity and stability of the cast-in-place continuous section of the prefabricated T-beam pier top can be guaranteed.

The utility model provides a hogging moment stretching platform. Comprising a middle person standing platform, a left hanging frame, a right hanging frame, a left person standing platform and a right person standing platform, wherein the lower end of the left hanging frame is connected to the left side of the middle person standing platform; the lower end of the right hanging frame is connected to the right side of the middle person standing platform; the left diagonal draw bar is used for connecting the left end of the left person standing platform with the left hanging frame; the right diagonal draw bar is used for connecting the right end of the right person standing platform with the right hanging frame; the distance between the left end of the left person standing platform and the right end of the right person standing platform is larger than the spacing distance between the longitudinal protruding strips on the two adjacent T-shaped beams. According to the hogging moment stretching platform, the width of the expanded hogging moment stretching platform is larger than the spacing distance between the longitudinal protruding strips of the box girder, and the problem that when an existing hanging basket is used, the distance between the hanging basket and a middle beam is large, and consequently safety is poor is solved.

The utility model discloses a tool rack for assisting T-beam hogging moment prestress tensioning equipment, and belongs to the technical field of device movement. The tool rack comprises a support, a sliding piece is installed on the support, a lifting device is connected below the sliding piece, C-shaped steel is installed on the lifting device, and the tensioning equipment is installed on one leg, close to the opening side, of the C-shaped steel. The other leg of the C-shaped steel is installed on the lifting device, and after the C-shaped steel is installed on the lifting device, the C-shaped steel and the tensioning equipment are in a horizontal suspension state. According to the tool rack for assisting the T-beam hogging moment prestress tensioning equipment, the tensioning equipment is installed on the C-shaped steel, the load of the tensioning equipment is increased, the tensioning equipment cannot shake during operation, a fixing device additionally installed on a conventional auxiliary tool rack is replaced, the whole auxiliary tool rack is simpler in structure, the cost is reduced, and the work efficiency is improved. The device is easy to assemble on a construction site and is more practical.

The utility model relates to the technical field of hoisting equipment, and provides a box girder hogging moment stretch-draw reserved notch mould hanging bracket and hoisting equipment, the box girder hogging moment stretch-draw reserved notch mould hanging bracket comprises a bracket body, a plurality of first hanging lugs and a plurality of second hanging lugs, the bracket body comprises an enclosure frame, a first cross rod and a second cross rod, the enclosure frame forms a hollow area, and the first hanging lugs and the second hanging lugs are arranged in the hollow area. The first cross rod and the second cross rod are arranged in the hollow area and are connected with the enclosure frame; the plurality of first lifting lugs are respectively arranged on the first cross rod and the second cross rod; the multiple second lifting lugs are all arranged in the hollow area, and the multiple second lifting lugs are arranged along the surrounding frame in a surrounding mode. And the stability and safety of the reserved notch mold in the hoisting process are enhanced through multi-point hoisting. And unforeseen circumstances such as unbalance and hanging ring unhooking caused by the fact that the reserved notch mold is directly grabbed and hoisted by hoisting equipment are avoided.

The present application relates to the technical field of building structure, and provides a steel concrete-steel truss composite beam structure with pre-applied reverse bending moment and a construction method thereof, the structure comprising support columns, double-layer steel truss beams and steel concrete beams arranged between adjacent support columns, and the top of the double-layer steel truss beam being fixedly connected with the bottom of the steel concrete beam; pre-compression devices or pre-tension devices are arranged between several groups of adjacent nodes in the interlayer plane of the double-layer steel truss beam, the pre-compression devices being located in the negative bending moment area of the steel concrete beam, and the pre-tension devices being located in the positive bending moment area of the steel concrete beam; the pre-compression devices make the steel concrete beam generate pre-applied positive bending moment in the negative bending moment area thereof, and the pre-tension devices make the steel concrete beam generate pre-applied negative bending moment in the positive bending moment area thereof. The pre-applied reverse bending moment can offset part of the bending moment effect caused by the upper load, improve the bearing capacity and crack resistance of the steel concrete beam, improve the spanning capacity of the beam under the premise of ensuring small clear height, and also improve the seismic performance of the composite beam.

The invention relates to the field of bridges, and aims to provide a pre-pressing hogging moment area corrugated steel web combined continuous beam bridge and a construction method thereof.The pre-pressing hogging moment area corrugated steel web combined continuous beam bridge comprises bridge piers sequentially arranged at intervals and corrugated steel web combined box beams erected at the tops of the bridge piers, and a plurality of steel pipe supports are arranged between every two adjacent bridge piers; the upper end of each steel pipe support is provided with a retractable bearing mechanism used for bearing the corrugated steel web combined box girder, and a tensioning mechanism used for applying pre-compressive stress to a hogging moment area of the corrugated steel web combined box girder is further connected between each steel pipe support and the corrugated steel web combined box girder. According to the invention, the pre-compressive stress can be applied to the hogging moment area of the corrugated steel web combined continuous beam bridge, so that the influence of cracking of a bridge concrete panel is reduced.