155 results about "Horizontal shear" patented technology

The invention relates to a transverse isotropic hard formation horizontal shear wave velocity inversion method and device. The method comprises the following steps: acquiring waveform data measured by a target interval array acoustic logging dipole mode; based on the waveform data, using a weighted spectrum coherence analysis method to calculate and obtain a bending wave actual measurement frequency dispersion curve; according to the bending wave actual measurement frequency dispersion curve, calculating to obtain bending wave time difference probability density; according to the bending wave time difference probability density, calculating to obtain a stratum vertical shear wave speed; establishing an objective function of transverse isotropic stratum horizontal shear wave velocity inversion based on a frequency dispersion equation of the transverse isotropic stratum and the stratum vertical shear wave velocity; and according to the objective function, inversion is carried out to obtain the stratum horizontal shear wave velocity. According to the method, the target function of horizontal shear wave velocity inversion is reduced from two dimensions to one dimension, and the stability and efficiency of inversion are remarkably improved.

The invention relates to a rock multi-surface direct shear test system and method considering fluid-solid coupling, and relates to the field of rock mechanics and seepage mechanics. Comprising a true triaxial loading frame which is used as a supporting frame of a test system and is used for clamping a sample and realizing a true triaxial stress state; the shear loading device is arranged in the true triaxial loading frame and is used for independently applying a horizontal shear load; the seepage module is connected with the true triaxial loading frame and is used for feeding fluid into the surface of the sample; the data acquisition system is used for monitoring and recording stress, strain, displacement, acoustic emission signals and seepage parameters in the test process in real time; and the servo control system is used for coordinating and controlling static loading, shear loading and seepage processes. According to the invention, the loading precision is improved, more real test conditions are provided for safety assessment of deep rock mass engineering and geological disaster prevention and control, and the device has important engineering application value.

The invention relates to a wind power tower bending shear torsion test loading anti-interference decoupling switching integrated device, which comprises a reaction wall, a support, a reaction column, a reaction longitudinal beam, a reaction cross beam and four actuators, and is characterized in that the top end of a fixed tower on the support is connected with a loading beam through a switching device; the first actuator applies axial load to the tower drum through the loading beam and the switching device, the second actuator and the third actuator apply bending moment to the end of the tower drum through the loading beam and the switching device, the fourth actuator is matched with the connecting piece, the rectangular steel plate is connected with the switching device to apply horizontal shearing force and torque to the end of the tower drum, and application and decoupling of various types of loads are achieved. The test precision is ensured; the device can truly simulate the load condition of the tower drum section, can also be matched with the loading beam to transmit the axial force, the bending moment, the shearing force and the torque to the wind power tower drum, and effectively solves the influence of horizontal displacement and torsional deformation on loading in the horizontal and vertical load coupling loading process in the wind power tower drum composite load simulation test.

The invention relates to a device for measuring deformation of components and nodes in a historic building wood structure, in particular to a system for measuring deformation between historic building wood components, which comprises a bracket set interlayer slippage measuring device, a column base node embedding-slippage measuring device and a mortise and tenon joint embedding-tenon pulling amount measuring device. The measuring system is mainly composed of three deformation quantity measuring devices suitable for different positions. The deformation quantity measuring devices comprise a tilt angle sensor, a small displacement sensor and a small displacement combination sensor. Measurement data are mainly collected through a static strain gauge and are simultaneously input into a computer terminal for real-time recording, data of corresponding sensors are integrated after export, and the deformation quantity required at each position is calculated. According to the invention, a set of complete measurement system suitable for horizontal and vertical relative deformation between historic building wood components is formed, and the problem that the relative deformation state between local components is difficult and inaccurate to obtain when the horizontal shear deformation of a structure is researched in the past is solved.

The invention relates to a stirring type particle circulation coupling reactor, a fluidized bed and a particle circulation coupling method, the fluidized bed comprises a reactor, a solid recovery device and a storage tank, a stirring structure is introduced into the reactor, and horizontal shearing force generated by stirring is used for crushing large-size particle agglomerates to prevent hardening of micro-nano particles; meanwhile, the circular flow of the gas medium provides a vertical acting force for the particles, and the coalescence behavior of the gas phase and the solid phase in the reactor is reduced, so that the problem that the micro-nano particles are blocked in the annular space area of the reactor is solved, the fluidization quality is improved, and the circular continuous treatment of the micro-nano particles is realized; the fluidized bed utilizes the built-in guide cylinder to realize circulation, and the circulation direction can be a central airlift type or a central descending type by adjusting the gas flow rate ratio of the guide cylinder to the annular gap area, so that the circulation flow of particles is enhanced, and the fluidization quality of the particles at the bottom of the circulation section is improved.

The invention discloses a test device for testing water-salt migration and shear strength of a novel partition layer of a salinized soil roadbed under THMC coupling conditions and a use method of the test device. The device comprises a water-salt migration system, a temperature control system, a vertical loading system, a horizontal shear system and a data monitoring system. Wherein the temperature system simulates roadbed temperature difference, the water-salt system reproduces internal water-salt migration, the vertical loading simulates an upper load, the horizontal shearing system directly measures the strength of a soil sample, and the data system monitors and records moisture, salt, temperature, stress and settlement changes in the soil sample in real time. The device can simulate a complex THMC coupling environment, reveal water and salt migration, temperature stress distribution and settlement rules, and can execute a direct shear test under the condition of keeping the original state of a soil sample. On the whole, the method has high feasibility, practicability and applicability, and a powerful tool is provided for salinized soil roadbed research.

A structural beam and deck assembly containing portions of beam members interconnected by a deck assembly. Beam members have horizontal top and bottom flange elements interconnected by one or more vertical web member. The top flange of the beam members is serrated such that a series of serrations protrude horizontally in at least one direction from a top of the one or more vertical web member or are cut-out from the flange of a rolled shape. Adjacent beam and deck assemblies are installed such that attachment of one portion of a beam member to another results in the completed cross section of the beam member. In one embodiment, the serrated top flange and at least a portion of the web member are intended to be encased by a horizontal concrete slab. The slab material is capable of encasing all exposed surfaces of and curing around each serration to transfer horizontal shear forces between the serrated top flange and the slab material such that the beam members and slab behave compositely.

The utility model discloses a 2000-ton microcomputer-controlled electro-hydraulic servo dynamic compression-shear testing machine, and belongs to the technical field of dynamic compression-shear tests. The testing machine comprises a four-stand-column and four-double-layer inclined rib main body frame, an upper pressing plate, a lower pressing plate and a horizontal shearing loading mechanism, wherein the four-stand-column and four-double-layer inclined rib main body frame is composed of four stand columns, an integrated base, a fixed cross beam, a vertical consolidation device and four double-layer inclined ribs; the vertical consolidation device comprises a vertical sensor and a heavy guide structure; an integrated base is arranged at the lower end of the tester; a horizontal shear loading mechanism is arranged above the integrated base; the integrated base is connected with four stand columns. A fixed cross beam is arranged on the four upright posts; a vertical oil cylinder is arranged in the middle of the fixed cross beam, a plurality of vertical sensors are arranged below the vertical oil cylinder, and an upper pressing plate is arranged below the plurality of vertical sensors; four vertical double-layer inclined ribs are connected to the four corners of the fixed cross beam, and heavy guide structures are arranged on the sides, close to the vertical double-layer inclined ribs, of the upper pressing plates respectively. The structure effectively solves the problem that the oil cylinder and the sensor are easily affected by lateral force to be damaged.

The utility model belongs to the technical field of building structures, and discloses a framed wall beam structure system which comprises frame columns, a frame joist, an upper-layer masonry wall, constructional columns and a ring beam, the lower portion of the frame joist is connected with a house foundation through a plurality of frame columns, and the constructional columns are arranged above the frame joist according to current specification requirements to be connected with the ring beam. Masonry walls are built among the frame joists, the constructional columns and the ring beams; a plurality of protruding pin keys are arranged in the length direction of the frame joist and embedded into a masonry wall, so that the interface of the wall and the beam is changed into a horse-tooth-shaped interface from a plane interface in the traditional design. By means of the protruding pin keys arranged on the frame joist, the horizontal shear resistance and the sliding resistance of the interface of the wall and the beam in the axis direction of the frame joist are enhanced, the wall beam serves as a combined component which is stressed integrally, the size and reinforcing bars of the joist are reduced, the clear height of a bottom layer is increased, the manufacturing cost is reduced, and good application and popularization value is achieved.

The application relates to an anti-seismic building pile foundation, and relates to the technical field of building pile foundations. The anti-seismic building pile foundation comprises a base body, the outer side of the base body is provided with a plurality of main support columns, a plurality of grooves are formed in the outer side surface of the base body and are fixedly connected with first fixing shells, one end of each main support column is fixedly connected with a first fixing block, the first fixing blocks are arranged in the first fixing shells respectively, and a secondary support column is arranged on the side surface of each main support column. Compared with a traditional single columnar pile foundation, the anti-seismic building pile foundation can disperse seismic loads in multiple directions, can transmit transverse seismic forces to a wider soil area through multiple levels of support, and can solve the problems that the anti-seismic building pile foundation with a single columnar structure has limited horizontal shear resistance, is prone to pile body fracture and inclination under the action of strong seismic loads, and the problems are more prominent, especially in soft soil foundations or high-intensity seismic areas.

The present invention relates to the technical field of TOD vibration isolation, and specifically, to a tensile thick-laminated rubber vibration isolation device for TOD upper cover buildings. It includes a thick-laminated rubber bearing, which includes multiple layers of steel plates and multiple layers of thick rubber sheets. The multiple layers of steel plates and the multiple layers of thick rubber sheets constitute a composite part, and the two ends of the composite part are respectively provided with a closure part and a connecting part. The thick-laminated rubber bearing is provided with an anti-pullout sleeve assembly, and the end of the anti-pullout sleeve assembly is connected to the connecting part. The anti-pullout sleeve assembly includes an anti-pullout sleeve, and a conical tensile guide rod is arranged in the anti-pullout sleeve, and a spacer rubber guide sleeve is arranged between the anti-pullout sleeve and the conical tensile guide rod. The present invention not only ensures the upper and lower vibration displacements of the thick-laminated rubber bearing under the vertical vibration isolation working condition through the provision of the anti-pullout sleeve, but also has greater anti-pullout, anti-impact, anti-tilt and anti-horizontal shear force capabilities.

The invention relates to the technical field of wind power generation tests, and discloses a wind power tower load loading test device and an evaluation system.The wind power tower load loading test device comprises a test bed, a loading structure and a load actuation structure; by arranging the loading structure and the load actuating structure, vertical axial force, bending moment, horizontal shearing force and torque can be applied to a test piece at the same time, and the test device is closer to the actual stress working condition compared with a traditional loading mode, so that the accuracy and reliability of test data are improved; the first actuator is arranged perpendicular to the upper end face of the loading piece so as to simulate the axial load and bending moment effect borne by the wind power tower in the operation process. The second actuator is arranged perpendicular to the side face of the loading part so as to apply shearing force and torque, multi-dimensional combined loading is achieved, and mechanical property analysis of complex load combination is facilitated; the loading mode is controlled through the actuator, the controlled and accurate load applying process is achieved, manual intervention is reduced, and the test efficiency and consistency are improved.

The invention discloses an X-ray three-dimensional imaging-based II-type and III-type crack in-situ testing device and method, belongs to the technical field of crack in-situ testing, and solves the problem that an existing crack in-situ testing device only tests I-type cracks and cannot test II-type and III-type cracks. The device comprises a tension-compression fatigue testing machine, a clamp main body and an X-ray monitoring assembly. Through the collaborative design of the translation reversing mechanism, the rotary reversing mechanism and the reversing switching piece in the clamp main body, the single vertical motion of the loading rod piece can be flexibly converted into horizontal shearing motion for testing type II cracks or rotary motion for testing type III cracks; therefore, in-situ testing of three basic crack types by one device is realized, the application range of the device is greatly expanded, the testing efficiency is improved, and a key experimental tool is provided for studying fatigue fracture behaviors of materials under multi-mode loads.

The invention discloses a method for calculating horizontal bearing deformation of a pile bucket foundation based on a multi-spring model. The method comprises the following steps: determining geometric parameters, soil body parameters and load parameters of the pile bucket foundation; according to a pile barrel foundation structure, foundation segmentation treatment is conducted, and the foundation is divided into a barrel reinforcing section and a barrel non-reinforcing section; establishing four spring models of the pile barrel foundation; determining the position of the rotation center; establishing and discretizing a control equation; and carrying out nonlinear equation set solution, and outputting a converged load-displacement curve and other distribution maps through iterative solution. According to the method, the p-y springs, the side impedance torque springs, the foundation anti-torque springs and the foundation horizontal shear springs are introduced, foundation failure modes and soil body constraint conditions under different pile barrel combinations can be fully considered, and the accuracy of calculation of the horizontal bearing deformation parameters of the pile barrel foundation is ensured.

The utility model relates to a transverse impedance multidirectional damping steel spring device which comprises a spring outer sleeve (1), a steel spring (5) and a spring inner sleeve, the spring inner sleeve comprises a spring inner sleeve cover (2) and a spring inner sleeve base (6), and a transverse impedance elastic body (3) for transverse limiting is arranged between the spring outer sleeve (1) and the spring inner sleeve base (6). Compared with the prior art, three-direction damping amplification is adopted, besides the main vibration isolation direction, the stability and vibration in the direction perpendicular to the main vibration isolation direction of the spring can be controlled, and meanwhile the problem that the spring is subjected to transverse shearing dynamic load to cause fatigue fracture and failure of the spring is solved; therefore, the transverse stability and reliability are improved, and the service life of parts is prolonged.

The application discloses a strong node connecting structure system of a fabricated concrete structure, relates to the technical field of building node connecting, and comprises a foundation column connecting assembly fixedly installed at the end of a foundation assembly, a column connecting assembly fixedly installed at the end of a column assembly, a beam connecting assembly fixedly installed at the end of a beam assembly and a beam-column node connecting assembly, the foundation column connecting assembly is fixedly connected with the column connecting assembly, the column connecting assembly is fixedly connected with the beam-column node connecting assembly, and the beam connecting assembly is fixedly connected with the beam-column node connecting assembly. The square tube of the foundation column connecting assembly and the beam-column node connecting assembly is provided with a spline piece, which can effectively resist horizontal shear stress and seismic force; the beam connecting assembly and the secondary beam connecting assembly adopt a first upper connecting plate, a first middle connecting plate and a first lower connecting plate in a upper-middle-lower separated mode, and when the main beam and the secondary beam are subjected to tension at the upper part and compression at the lower part, the main beam and the secondary beam can bear load bending moment and resist torsional deformation.

The present invention discloses a connection structure of an asynchronous cantilever construction steel-concrete joint and a construction method thereof, comprising a corrugated steel plate, a flange plate, a perforated rib plate, a through-steel, a rubber sleeve, an L-shaped steel and a concrete top plate; the corrugated steel plate is welded to the bottom of the flange plate, the flange plate is evenly divided by the lower corrugated steel plate, the through-steel is symmetrically welded to the surface of the flange plate; the through-steel passes through the perforated rib plate, the rubber sleeve wraps the through-steel, the L-shaped steel is symmetrically welded to the outside of the perforated rib plate, and the concrete top plate wraps all the above structures. Under the action of the same load, compared with the original connection structure, the present invention can effectively prevent the influence of local horizontal shear force on concrete, avoid cracking of concrete at the end, and ensure the quality of the project. In addition, all components are symmetrically arranged, the construction is simple, and the impact on the construction progress is minimal.

The utility model discloses an anti-pulling and non-shearing connecting structure of a disassembly-free bottom die steel bar truss floor support plate, which comprises a disassembly-free template and a steel bar truss arranged on one side of the disassembly-free template, and further comprises a connecting piece, the connecting piece is respectively connected with the steel bar truss and the disassembly-free template, the connecting piece is rigidly connected with the steel bar truss, and the connecting piece is connected with the disassembly-free template. The connecting piece is flexibly connected with the non-dismantling formwork in the direction parallel to the plane where the non-dismantling formwork is located, and is rigidly connected with the non-dismantling formwork in the direction not parallel to the plane where the non-dismantling formwork is located. According to the utility model, the disassembly-free bottom die can be effectively prevented from cracking under the action of horizontal shearing force, and the durability is improved.

The invention relates to a rock high-frequency multi-surface direct shear test system and a rock high-frequency multi-surface direct shear test method considering fluid-solid coupling, and relates to the field of rock mechanics and seepage mechanics. Comprising a true triaxial loading frame which is used as a supporting frame of a test system and is used for clamping a sample and realizing a true triaxial stress state; the shear loading device is arranged in the true triaxial loading frame and is used for independently applying a horizontal shear load; the seepage module is connected with the true triaxial loading frame and is used for feeding fluid into the surface of the sample; the high-frequency dynamic disturbance device is arranged in the true triaxial loading frame and is used for applying a disturbance load; the data acquisition system is used for monitoring and recording stress, strain, displacement, acoustic emission signals and seepage parameters in the test process in real time; and the servo control system is used for coordinating and controlling static loading, shear loading, seepage and high-frequency dynamic disturbance processes. The invention provides a test system and method capable of comprehensively considering a fluid-structure interaction effect, high-frequency disturbance and multi-surface direct shear loading so as to overcome the defects in the prior art.

The invention relates to the technical field of data query and analysis, in particular to an intelligent acquisition, analysis and processing method for transformer cross cut sheet stock detection data. The method comprises the following steps: firstly, constructing a cross-cut sheet material production database, and then if a detection result of the cross-cut sheet material is unqualified, performing feature extraction on the unqualified cross-cut sheet material to obtain an unqualified sample feature; obtaining a first cross cut sheet stock set according to the main association retrieval similarity, obtaining a second cross cut sheet stock set according to the secondary association retrieval condition, and constructing an unqualified cross cut sheet stock set according to the first cross cut sheet stock set and the second cross cut sheet stock set; constructing an unqualified factor feature vector set according to the causal strength index; processing elements in the disqualified factor feature vector set according to the effective frequency to obtain main factors of the disqualified cross cut sheet stock; and real-time data of steps or processes where the main factors are located are collected and are compared and analyzed with standard data, and early warning is given out.

A method, system, device, and readable storage medium for predicting leading-edge bulging cracks are disclosed, relating to the field of geological disaster monitoring and early warning. Specifically, the method includes determining the active thrust of the landslide on the leading edge based on the landslide mass weight, sliding surface dip angle, seepage hydrodynamics, and additional thrust, wherein the additional thrust is generated by external dynamic disturbance. When the detected active thrust is not less than the passive earth pressure limit, the target vertical bulging displacement is determined based on horizontal shear displacement, maximum dilatation angle, geometric correction factor for shear zone thickness, hydraulic correction factor, initial effective stress, real-time effective stress, and dilatation angle stress sensitivity factor. The predicted leading-edge bulging crack result is determined based on the target vertical bulging displacement and the predicted vertical bulging displacement. This application can improve the accuracy and applicability of leading-edge bulging crack prediction.

This invention discloses a prefabricated staircase and its construction method, relating to the field of prefabricated building construction technology. By setting up the staircase body and two anchoring structures, under normal use, the anchoring structures provide sufficient vertical bearing capacity and horizontal shear resistance, ensuring the overall stability of the staircase. In the event of sudden disasters such as earthquakes, due to the presence of through-type anchor bodies within the anchor holes, when the stair slab participates in resisting lateral forces in the main structure, the shear force is mainly distributed to the load-bearing beam through the anchor bodies in the anchor hole area, rather than concentrated at the single lap interface between the stair slab and the load-bearing beam. This effectively avoids concentrated shear failure caused by the short column effect at the stair slab ends due to abrupt changes in stiffness, reducing the risk of brittle shear failure of the stair slab, thereby protecting the prefabricated staircase components from severe damage. The staircase is less prone to overall collapse or severe displacement, which helps maintain the relative unobstructed escape route during earthquakes and increases the possibility of safe evacuation.

The invention discloses a lift-off support structure, and relates to the technical field of supports. According to the main technical scheme, the lifting-off device comprises a lifting-off buckle cover, a lifting-off screw rod, a first plate body, a lifting-off clamping tenon and a supporting column body, wherein a lifting-off clamping groove is formed in one side of the lifting-off buckle cover; the lift-off screw rod is arranged on one side of the lift-off buckle cover; the first plate body is oppositely arranged on one side of the lift-off buckle cover, and the first plate body is connected to the lift-off screw rod in a sliding manner; the lift-off clamping tenon is arranged on the first plate body in a penetrating mode, and the lift-off clamping tenon is connected to the lift-off clamping groove in a sliding mode. The supporting column body is arranged on the side, away from the lift-off buckle cover, of the first plate body, and the supporting column body is connected to the lift-off clamping tenon. When an earthquake occurs, the lift-off clamping tenon is attached to the groove wall of the lift-off clamping groove. At the moment, the lift-off clamping tenon and the lift-off screw rod transmit horizontal shearing force together. The aims of reducing the fracture risk of the lifting screw rod, prolonging the service life of the lift-off support structure and improving the structural stability are expected to be achieved.

The utility model relates to the technical field of vibration isolation of constructional engineering, in particular to a support suitable for horizontal vibration isolation and vertical isolation of subway vibration, which comprises a platform upper connecting plate, a horizontal vibration isolation support arranged on the platform upper connecting plate, a vertical vibration isolation support, a horizontal anti-rotation system and a platform lower connecting plate, the vertical vibration isolation support comprises an upper cover barrel and an elastic element connected with the upper cover barrel, the top of the upper cover barrel is connected with the bottom of the platform upper connecting plate, the lower end of the elastic element is connected with the platform lower connecting plate, and the two ends of the horizontal anti-rotation system are connected with the platform upper connecting plate and the platform lower connecting plate respectively. The horizontal anti-rotation system is arranged on the periphery of the vertical vibration isolation support, the horizontal anti-rotation system can change along with compression or stretching of the vertical vibration isolation support, the horizontal vibration isolation support and the vertical vibration isolation support are connected in series, and meanwhile the horizontal anti-rotation system is arranged on the periphery of the vertical vibration isolation support. When the horizontal shear displacement of the horizontal shock insulation support occurs, the support disclosed by the utility model does not rotate as a whole.

The application relates to a kind of anti-interference decoupling switching integrated devices for wind power tower cylinder bending shear torsion test loading, including counterforce wall, support, counterforce column, counterforce longitudinal beam, counterforce crossbeam and four actuators, the top end of tower cylinder fixed on support is connected to loading beam through switching device, first actuator applies axial load to tower cylinder through loading beam and switching device, second, third actuator applies bending moment to the end of tower cylinder through loading beam and switching device, fourth actuator cooperates with connecting piece, horizontal shear and torque are applied to the end of tower cylinder through rectangular steel plate connected switching device, realize the decoupling of various types of load application, ensure test accuracy;The device can truly simulate the load condition of tower cylinder section, and can also transmit axial force, bending moment, shear and torque to wind power tower through loading beam, effectively solve the influence of horizontal displacement and torsional deformation on loading in the process of horizontal and vertical load coupling loading in wind power tower composite load simulation test.

The invention discloses a rock-fill particle cyclic shear test system and test method, and relates to the technical field of shear tests, the rock-fill particle cyclic shear test system comprises a test frame, a shear box assembly, a vertical loading device, a horizontal shear device and a data acquisition system. By adopting a rolling shaft structure, friction interference can be reduced, constant vertical stress can be accurately applied by combining the synergistic effect of a high-precision hydraulic pusher and a force transmission plate in the vertical loading device, and the horizontal shearing device can be used for shearing a workpiece through a second hydraulic pusher and a third hydraulic pusher. Dynamic simulation of a horizontal cyclic shear load under a complex stress path is realized, mechanical response of a rockfill body in an actual working condition is completely restored, a data acquisition system integrates a three-dimensional shear force sensor, a laser displacement sensor and a high-speed camera unit, a stress-displacement evolution process and particle motion mesoscopic characteristics can be synchronously captured, and the mechanical response of the rockfill body in the actual working condition is completely restored. And multi-dimensional coupling analysis can be realized in cooperation with a data processing terminal.

The utility model discloses a water turbine guide vane middle sleeve pressing plate device capable of preventing a bolt from being broken, which comprises a whole circular ring pressing plate (2) formed by combining two semicircular ring pressing plates (1), the whole circular ring pressing plate (2) is provided with fixing bolt holes (3) which are uniformly distributed and staggered with a splicing sectioning line of the two semicircular ring pressing plates (1), and each semicircular ring pressing plate (1) is provided with four fixing bolt holes (3). Fixing bolt holes (3) are formed in the two semicircular pressing plates (1), the fixing bolt holes (3) in the two semicircular pressing plates (1) are symmetrically formed relative to a splicing sectioning line, detachable fixing bolts (4) are arranged in the fixing bolt holes (3), four sets of limiting grooves (5) which are evenly distributed are formed in the outer edge of the whole circular pressing plate (2), the transverse sections of the limiting grooves (5) are semicircular, and special pins (6) for supporting the whole circular pressing plate (2) in the radial direction are arranged on one sides of the limiting grooves (5). Horizontal shearing force borne by the fixing bolts can be reduced, and the situation that the pressing plate bolts are broken is avoided.

The utility model discloses a novel damping device for an elevator main engine, which belongs to the technical field of damping devices and comprises a support component, the support component comprises a first support plate, a spherical hinge support plate is integrally arranged above the first support plate, a spherical core is hinged inside the spherical hinge support plate, and a second support plate is arranged above the spherical hinge support plate. A second support plate is integrally arranged at the top of the ball core; a plurality of groups of belleville springs are connected between the first support plate and the second support plate; and the honeycomb base plate is connected to the upper surface of the second support plate, and the center of the honeycomb base plate is fixedly connected with a threaded connecting rod. Three-degree-of-freedom bearing is achieved through the supporting assembly, vertical pressure, horizontal shearing force and torsional moment are borne at the same time through cooperation of a ball core and a sliding interface, a three-dimensional stress system is formed, meanwhile, load uniformization is achieved, stress distribution is uniform through the spherical surface contact design, and local stress concentration is avoided.

The invention relates to coarse-particle soil direct shear and repeated shear test equipment and a test method, and relates to the field of soil mechanics test equipment. According to the technical scheme, the friction detection and rolling mechanism outputs horizontal shearing force through the horizontal servo motor, the shearing force deducts extra friction force generated by related rolling parts through the friction sensor, and the reliability of test data is improved; the V-shaped embedded guide rail is matched with the V-shaped bearing seat, so that chipping abrasion is avoided, the shearing box mechanism is limited to only do one-way reciprocating motion, lateral movement deflection is prevented, vertical stress uniformity is guaranteed, the service life is prolonged, the maintenance cost is reduced, and automatic alignment can be achieved to improve efficiency; the conveying mechanism provides power and is matched with a motor and the like to achieve automatic operation, labor intensity and cost are reduced, and the automation degree is high; the shearing box mechanism in modular design is convenient to maintain, sample loading boxes of different specifications and types can be replaced, subsequent maintenance is facilitated, and the experiment efficiency and the resource utilization rate are improved; the lifting foot margin mechanism is convenient to install, and a fixed floor does not need to be transformed.

The invention provides a calculation optimization method for an arch and cross beam combined section of a separated steel truss girder arch bridge, and belongs to the technical field of civil engineering, and the method comprises the following steps: determining a shear-resistant section according to the arch and cross beam combined section structure and a force transmission path, and determining main shear-resistant plates and welding seams; setting constraint conditions, and calculating to obtain vertical and horizontal shear forces of the shear-resistant section; solving the shear stiffness of a shear resistant plate and a welding seam by utilizing a shear stiffness calculation formula of a connecting plate of the arch and the cross beam and the welding seam after correction, and distributing shear force to calculate the force transmission of the plate and the welding seam; calculating the average shear stress of the force transmission plate and the weld joint, constructing a shear stress function, and calculating the maximum shear stress; introducing a strength check coefficient to judge a shear stress result, and optimizing the thickness of a combined section plate and the number of partition plates to obtain a structure optimization scheme; the method solves the problems that an existing arch and cross beam combined section optimization calculation method is huge in workload, complex in process and long in structure checking calculation time.