8 results about "Hogging" patented technology

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 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 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 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.