9 results about "Surface shear" patented technology

The application discloses a micro-nano circular plate fracture analysis method considering coupling of surface effect and plastic zone, and firstly establishes a three-dimensional curved surface coordinate system suitable for a surface layer, and then further corrects a Dugdale cohesion force model according to a superposition principle after considering surface correlation of the plate, and then simplifies the Dugdale cohesion force model into a hyper-singular integral equation by using Hankel transformation, and finally obtains influences of the surface effect on the plastic zone size and crack surface displacement by numerically solving the hyper-singular integral differential equation.The method can accurately capture the nonlinear coupling relationship between the crack size, the surface shear modulus, the torsional displacement and the stress intensity factor under the micro-nano scale, effectively corrects calculation deviation generated by traditional classical theory when the surface effect is ignored, ensures the accuracy of the fracture analysis under different scales, and realizes more accurate and more comprehensive theoretical description of the elastic-plastic fracture behavior of the micro-scale material.

The utility model discloses a kind of stress regulation and control structures of anti steel bridge bridge surface shearing damage, belong to steel bridge technical field, for the uneven shearing stress distribution of steel bridge and pier contact surface caused by steel bridge surface stress concentration, easy to induce microcrack and gradually expand into structural crack, finally cause the problem of local or overall rupture of bridge surface, including pier, the bottom surface of pier inner side wall is fixed with horizontal plate, the top surface middle part of horizontal plate is fixed with double-shaft motor, two output ends of double-shaft motor are fixed with threaded rod respectively, the both sides of the top surface of horizontal plate are fixed with side block;The utility model cooperates with control box, adjusts the position of dispersion type support frame, so that the position of stress concentration of steel bridge can be supported, effectively disperses stress, avoids uneven shearing stress distribution of steel bridge and pier contact surface caused by concentrated stress, easy to induce microcrack and gradually expand into structural crack, finally cause the local or overall rupture of bridge surface.

This invention discloses a composite-structure wall shear-enhanced sintering raw material mixing and granulation device and method, belonging to the field of metallurgical sintering raw material processing technology. The device includes a storage cylinder and a stirring component disposed on its inner wall. The stirring component employs three optimized structures: a trapezoidal composite lifting component, a lifting plate and shear blade synergistic structure, or a lifting plate and inclined baffle synergistic structure. By optimizing the inner wall component structure, this invention can generate a three-dimensional composite force field of radial lifting, axial shearing, and diffusion on the material, significantly improving the mixing uniformity and granulation efficiency of the sintering raw materials, effectively controlling particle residence time, and reducing energy consumption. This invention has a simple structure, is easy to modify based on existing cylindrical equipment, and has extremely high industrial application value.

The utility model discloses a shear wall structure belongs to building construction technical field, including shear wall body and connecting component, the shear wall body both sides symmetry is provided with tenon, and the whole surface shear wall is formed to a plurality of groups splicing through tenon splicing, and longitudinal grouting cavity pouring fixed is formed, connecting component includes two connecting plates and fixed bottom plate, and connecting plate and fixed bottom plate perpendicularly weld in unison, and fixed bottom plate bolt fixed is on the beam body, and connecting plate is cooperated with the long groove of shear wall body lower part, forms horizontal grouting cavity and adopts bolt fixed, is used for vertical connection shear wall body and beam body. The utility model has the advantages of high installation stability, low construction precision requirement, simple construction process, reduces construction cost, and effectively shortens construction period.

The application provides an anchoring and supporting device and method which can adapt to large deformation of rock mass structure surface shearing. The anchoring and supporting device is a wedge-shaped split sleeve shear-resistant variable anchor rod, which comprises a rod body formed by sequentially connecting an outer anchor part, a free part, an intermediate anchoring part and an inner anchor part, and a wedge-shaped split sleeve arranged on the intermediate anchoring part, and a fixed orientation push rod with a grouting guide pipe is arranged on the wedge-shaped split sleeve. According to the position and direction of the shearing dislocation surface of the surrounding rock, the method uses a drilling machine to drill a hole and inserts the wedge-shaped split sleeve shear-resistant variable anchor rod into the hole for anchoring, pushes the wedge-shaped split sleeve to a specified depth through the fixed orientation push rod, adjusts the angle to form a closed grouting space, injects low-strength rapid-setting gel into the space, installs a tray and a lock nut and applies a pre-tightening force. The application converts passive adaptation of the anchor rod to the deformation of the surrounding rock into active control of the deformation of the surrounding rock, effectively reducing the reinforcement support and secondary support caused by the breakage of the anchor rod.

The application discloses a shear capacity prediction method and system based on an intelligent algorithm: test data of a double-sided laminated shear wall laminated surface shear capacity test is acquired; three second-order interaction features are constructed through feature multiplication according to a seven-dimensional input feature vector, and combined with original seven-dimensional features to form a ten-dimensional enhanced feature vector; the ten-dimensional enhanced feature vector is normalized; a standardized data set is divided into a training set and a test set; a three-layer BP neural network including an input layer, a hidden layer and an output layer is constructed; the training set is used to train the BP neural network by using a back propagation algorithm, and network weight and bias parameters are updated by using a gradient descent algorithm until a loss function converges or a maximum iteration number is reached; the prediction accuracy of the trained BP neural network is evaluated according to the test set; and the shear capacity of a to-be-tested sample is calculated by using the BP neural network that has passed evaluation. The application improves the bearing capacity prediction accuracy.

This utility model discloses a concrete-surfaced shear wall structure, relating to the field of wall reinforcement technology. The concrete-surfaced shear wall structure includes an original infill wall, an original beam, a shear wall structure, and steel plate components. The original beam is connected to the original infill wall. The shear wall structure includes rebar anchors, rebar components, and a concrete wall structure. The first wall structure of the concrete wall structure is connected to one side of the original beam, and the second wall structure is connected to the original infill wall. Part of the rebar anchor structure is located in the original beam, and another part is located in the first wall structure or in the second wall structure. The rebar components are located in both the first and second wall structures. Thus, by reinforcing both sides of the original infill wall to form a concrete-surfaced shear wall structure, the stiffness and seismic bearing capacity of the original infill wall are improved, thereby enhancing its seismic performance.

This invention discloses a rock mass structural surface shear strength degradation model that simultaneously considers vibration abrasion and relative motion velocity. Addressing a significant shortcoming of current structural surface strength vibration degradation models—namely, the exaggeration of the influence coefficients of vibration abrasion and relative motion velocity on the vibration degradation of structural surface strength—this invention improves upon the aforementioned models based on the Barton criterion. It proposes a rock mass structural surface shear strength degradation model that simultaneously considers vibration abrasion and relative motion velocity. Furthermore, parameter sensitivity analysis is used to study the influence of peak ground acceleration, basic friction angle and roughness coefficient of the structural surface, and the shear strength degradation factor parameters m and P0 on slope seismic stability, providing a useful reference for slope seismic stability analysis.