19 results about "Shear bond" patented technology

The utility model relates to the technical field of steel structure shear resistance, in particular to a novel steel structure shear key which comprises a high-strength bolt and a sleeve which are sleeved together, the top of the sleeve is inserted into a pre-embedded plate of a steel column foot or a support, and the top of the sleeve is in threaded connection with the pre-embedded plate and then is welded and reinforced under the plate in a surrounding mode. The sleeve is embedded into a foundation and fixedly connected with the foundation, and the high-strength bolt is screwed into the sleeve through the top of the sleeve and fixedly connected with an upper layer component through a nut. The high-strength bolt and the sleeve which are sleeved with each other are adopted to replace existing H-shaped steel and square steel, only a small installation gap is needed, steel bars at the joint are easy to process, the influence on anchoring connection of concrete and the steel bars at the connecting position can be reduced to the maximum extent, the embedded part is machined in a factory, and the construction cost is reduced. And the connection precision and quality are guaranteed, only high-strength bolts need to be screwed in and screwed to the installation torque on site, and the effect is good through practice inspection.

The invention discloses a joint with a ring beam-UHPC prefabricated pipe concrete column and a frame structure, and belongs to the technical field of building structures, the joint of the concrete column comprises a prefabricated UHPC formwork reinforced concrete frame column, a prefabricated UHPC formwork reinforced concrete frame beam and a prefabricated UHPC formwork reinforced concrete ring beam; each of the prefabricated UHPC formwork reinforced concrete frame columns and the prefabricated UHPC formwork reinforced concrete frame beams comprises a prefabricated UHPC formwork and cast-in-place concrete poured in a hollow structure of the prefabricated UHPC formwork, and a reinforcement cage is embedded in the prefabricated UHPC formwork; the prefabricated UHPC formwork reinforced concrete ring beams are connected with the prefabricated UHPC formwork reinforced concrete frame columns through shear keys, and the prefabricated UHPC formwork reinforced concrete frame beams are connected with the prefabricated UHPC formwork reinforced concrete ring beams through lap joint steel bars. Compared with a traditional concrete frame structure, the prefabricated UHPC formwork reinforced concrete frame structure has the advantages that the bearing capacity, the pressure resistance, the corrosion resistance and the abrasion resistance are remarkably improved, in addition, by means of UHPC, the durability of a building can be improved, and the service life of the building can be prolonged.

The invention belongs to the technical field of adhesive performance detection, particularly relates to test equipment and a test method for detecting adhesive bonding strength, and aims to solve the problem that different detection equipment needs to be used when different adhesive bonding strengths are detected in the prior art, the following scheme is provided: the test equipment comprises a base, a U-shaped frame is fixed at the top of the base, and the U-shaped frame is fixed at the bottom of the base; a hydraulic cylinder fixedly penetrates through the top of the U-shaped frame, a first U-shaped clamping seat is fixed to an output shaft of the hydraulic cylinder, a countersunk head screw is clamped in the first U-shaped clamping seat, a bonding bottom material and a bonding top material are arranged at the bottom end of the countersunk head screw, and the bonding bottom material and the bonding top material are bonded through mucilage glue. According to the test equipment, a tensile bonding force test, a shear bonding force test, an impact bonding force test and an environmental adaptability test can be sequentially performed on the test equipment, so that the test function of the test equipment is improved, the test cost is reduced, the test range is greatly widened, and the efficiency of later-stage adhesive bonding strength detection can be further improved.

The present invention discloses a device and method for measuring the shear bond strength of a high-temperature and high-pressure cementing interface, and belongs to the field of oil and gas well cementing. The device includes a kettle body, an oil storage tank, a hydraulic pump, an electronic control system, a display, a support frame and a base. The kettle body includes a top cover, an upper kettle, a lower kettle, a bottom cover, a simulated casing, a simulated formation, a positioning steel cylinder, a piston cylinder, an inner piston, an outer piston and a floating support plate. The method includes: pouring cement slurry into the annular space between the simulated casing and the simulated formation; curing the cement slurry at a constant temperature and pressure; slowly increasing the pressure in the piston cavity, and moving the inner piston downward until the simulated casing is separated from the cement ring; continuing to increase the pressure in the piston cavity, and the outer piston moves downward under the push of the inner piston until the cement ring is separated from the simulated formation. The test process of the present invention is controllable, and the test results are consistent with the downhole environment, providing an important technical means for optimizing cement slurry performance and cementing process parameters, and further improving the cementing quality of oil and gas wells.

Provided is a steel pipe joint device. The steel pipe joint device disclosed herein comprises: a first joint pipe coupled to one end of a steel pipe; a second joint pipe inserted into and coupled to the first joint pipe; a shear key for connecting the first joint pipe and the second joint pipe; a first fixing part for fixing the shear key to the first joint pipe; and a second fixing part for fixing the shear key to the second joint pipe.

The invention relates to a BFRP-lightweight concrete-steel double-wall hollow beam connected through PBL shear keys. The BFRP-lightweight concrete-steel double-wall hollow beam comprises a BFRP pipe, a hollow steel pipe and a lightweight self-compacting fiber reinforced concrete layer. The BFRP pipe is a rectangular pipe column with fillets, the radius of the fillets is 1020 mm, and the thickness of the fillets is smaller than 5 mm. The hollow steel pipe is round or square, the thickness of the hollow steel pipe is 510 mm, and the hollow steel pipe shifts to a tension area to enhance the bending performance. The PBL shear keys are composed of perforated steel plates and high-strength deformed steel bars and are divided into a single-hole continuous form and a multi-hole continuous form, and the shear strength and ductility of the steel-concrete composite structure are enhanced. The light self-compacting fiber reinforced concrete is prepared from a plurality of materials in proportion, and has good self-compacting property and durability. The structure integrates the durability of BFRP and the excellent mechanical performance of a steel-concrete composite structure, and is suitable for outdoor severe environments and compression or bending members with anti-seismic requirements.

Provided is a pressure-sensitive adhesive sheet which has excellent impact resistance, is less apt to leave an adhesive residue, and brings about excellent reworkability.　A pressure-sensitive adhesive sheet 1 includes a pressure-sensitive adhesive layer 2 which is a rubber-based pressure-sensitive adhesive layer. When the pressure-sensitive adhesive surface (adhesive surface (X)) of the pressure-sensitive adhesive layer 2 is applied to a stainless-steel plate, and this pressure-sensitive adhesive layer 2 is allowed to stand for 30 minutes in an environment of 23°C and 50% RH and then examined for 180° peeling adhesive force at a pulling speed of 300 mm / min, the peeling adhesive force is 5.5 N / cm or greater. When the pressure-sensitive adhesive surface (X) of the pressure-sensitive adhesive layer 2 is applied to a stainless-steel plate, and this pressure-sensitive adhesive layer 2 is allowed to stand for 24 hours in an environment of 23°C and 50% RH and then examined for dynamic shear bond force under the conditions of a pulling speed of 10 mm / min and a peel angle of 0°, the dynamic shear bond force is 0.35 MPa or greater. When the pressure-sensitive adhesive surface (X) of the pressure-sensitive adhesive layer 2 is applied to a stainless-steel plate, and this pressure-sensitive adhesive layer 2 is allowed to stand for 30 minutes in an environment of 23°C and 50% RH and then examined for 180° peeling adhesive force at a pulling speed of 300 mm / min after supplying 0.5 mL of ethanol to the adhesion interface, then the adhesive force is 2.0 N / cm or less.

The present invention discloses an anchor-type split assembly type anchor foundation and a tension leg platform, wherein the tension leg platform comprises a pile foundation, the pile foundation comprises a first base and a second base connected to each other, the first base is used to be inserted into the ground, and the second base is set as a hollow structure, and the anchor-type split assembly type anchor foundation also comprises an anchor device, the anchor device is sleeved on the outer wall of the second base, and the inner wall of the anchor device is provided with a shear key. The anchor-type split assembly type anchor foundation utilizes the first base to be driven into the soil, and then the second base is set as a hollow structure, and the reinforcement performed by the anchor device can greatly improve the overall stiffness and strength of the single pile foundation, improve the whole machine frequency of the wind turbine, improve the comprehensive bearing performance of the wind turbine foundation, and make the large-diameter single pile suitable for deeper water depths and more complex marine environments. In addition, by arranging shear keys on the inner wall of the anchor device, the ability of the deep-water floating wind power platform to resist environmental loads is further improved.

The utility model discloses a passive packer with a protective structure, including a packer body, a fixing assembly fixedly assembled between the packer body and the sleeve, a guide protection steel sheet fixedly assembled on the packer body through the fixing assembly, and an auxiliary support mechanism assembled in the packer body. By arranging the guide protection steel sheet, the surface of the packer body can be protected during the process of inserting the sleeve into the steel pile, avoiding the contact between the surface of the packer body and the steel pile shear key in the steel pile, effectively reducing the damage to the surface of the packer body during the pile insertion process, and reducing the risk of sealing failure of the packer body during the subsequent grouting process.

The utility model discloses a dental after tooth bonding's shearing adhesive strength testing arrangement belongs to involve material testing technical field, including support board, the support board is fixedly connected with mounting panel, the outside fixed connection of electric push rod has electric push rod, the piston rod end fixed connection of electric push rod has vertical board, the outside mounting of vertical board has thrust sensor, in the shearing force test process, still can rotate through the first twist seat that torque test motor drives to carry out, and the first twist seat will drive the tooth that contacts the contact board to rotate under the condition of rotating, and all carry out slight rotation deviation in each rotation process, simulate the slight deviation phenomenon that will appear in human body occlusion process, further increase the diversity of strength test, increase data result to make the test result more in line with the use environment in human body use process.

The invention discloses a composite structure bridge shear key state monitoring method and system based on an intelligent coating. The method comprises the steps that S1, crack damage information of a monitored object is acquired; s2, processing the obtained crack damage information; s3, analyzing the processed crack damage information, and determining a structure crack damage condition in combination with structure system characteristics; and S4, combining the structure crack damage condition with the expert experience database of the specific engineering structure, and evaluating the state of the monitored object. According to the invention, real-time quality monitoring of the composite structure bridge shear key which is difficult to monitor is realized, and service life reduction and potential safety hazards of the composite structure bridge caused by damage of the bridge shear key are effectively avoided.

To provide a bridge joint structure that ensures sufficient load-bearing performance in the direction perpendicular to bridge axis.SOLUTION: A bridge joint structure 100 includes a cross girder 1 that is installed on a substructure 3 via supports 4 and extends in a direction perpendicular to the bridge axis, and multiple precast main girders 2 that are installed on the cross girder 1 and extend in the bridge axis direction in parallel to the direction perpendicular to the bridge axis, and a shear key 6 is formed on the top surface of the cross girder 1 to prevent the multiple precast main girders 2 from shifting due to shear force. The jointing method includes a cross girder installation process to install the cross girder 1 on the substructure so that the surface with the shear key 6 becomes the girder top surface, and a main girder installation process to install the multiple precast main girders 2 on the cross girder 1 so that the shear keys 6 prevent them from shifting due to shear force.SELECTED DRAWING: Figure 1

In a general aspect, an anchor includes a tubular body formed at least partially from a cementitious material and having an open end and a closed end. The anchor also includes an eye pad coupled to the tubular body and configured to be coupled to a mooring line. The tubular body includes a base wall, a peripheral wall, and a shear key. The base wall defines a closed end of the tubular body and has first and second surfaces on opposite sides of the base wall. A peripheral wall extends from a first surface of the base wall to an open end of the tubular body, and a shear key extends from a second surface of the base wall. The shear key is configured to penetrate into the subsea surface and to resist lateral displacement of the anchor along the subsea surface upon penetration.

The present invention provides a bridge system conversion structure and construction method based on a corrugated steel web composite structure. By using a prefabricated composite assembly section and a steel-concrete hoisting section, the existing T-shaped rigid frame bridge simply supported hanging hole system can be quickly converted into a continuous system. At the same time, a corrugated steel web-UHPC steel-concrete composite beam is used to replace a traditional concrete hanging beam, thereby reducing the dead weight of the structure. In conjunction with the conversion of the system, the bending moment at the root of the T-frame is greatly reduced, and the structural safety redundancy is improved. A steel top plate + inverted V-shaped shear key ultra-high performance concrete composite bridge deck system is adopted, which can greatly reduce the dead weight and solve the cracking problem compared with a concrete bridge deck. Compared with a steel bridge deck, the top plate stiffening rib can be omitted and the steel plate thickness can be reduced, and the overall durability is good. During construction, factory prefabrication and on-site installation are adopted, thereby avoiding complex on-site steel-concrete combined section construction, and there is no need to set up temporary supports in the water. The overall hoisting and connection assembly are pre-connected to achieve rapid installation in a short time, and the construction process is simple.

A prosthesis including a UHMWPE core and a coating, wherein the core is a cup-shaped core having a concave first side and a convex second side, wherein the UHMWPE has a weight average molecular weight that is from 2×106 to 3×106 grams per mole. The core has a tensile strength that is from 35 to 50 MPa. The coating layer coats the second side of the core. The coating includes titanium powder having a D50 particle size of from 200 to 250 microns. The coating has a mean thickness that is from 200 to 500 microns. The prosthesis is an acetabular cup prosthesis. When tested for abrasion resistance, the coating loses less than 65 milligrams when abraded for 100 cycles. The coating has a static shear bond strength that is from 15 to 25 MPa and a static tensile bond strength that is from 14 to 25 MPa.

Provided is a method for producing an electrode with which it is possible to obtain a composite material sheet having good stretchability. The method for manufacturing an electrode (10) is characterized by comprising: a composite material sheet manufacturing step for manufacturing a composite material sheet (12) by forming a powder (20) of an electrode composite material containing an active material and a fibrous binder and having a solid content concentration of substantially 100% into a sheet; and a bonding step in which the composite material sheet (12) is bonded to the surface of the core material (11), the binder having, as the main component, polytetrafluoroethylene having a shear bond stress of 40 kPa or less.

A prosthesis including a UHMWPE core and a coating, wherein the core is a cup-shaped core having a concave first side and a convex second side, wherein the UHMWPE has a weight average molecular weight that is from 2x106 to 3x106 grams per mole. The core has a tensile strength that is from 35 to 50 MPa. The coating layer coats the second side of the core. The coating includes titanium powder having a D50 particle size of from 200 to 250 microns. The coating has a mean thickness that is from 200 to 500 microns. The prosthesis is an acetabular cup prosthesis. When tested for abrasion resistance, the coating loses less than 65 milligrams when abraded for 100 cycles. The coating has a static shear bond strength that is from 15 to 25 MPa and a static tensile bond strength that is from 14 to 25 MPa.

The utility model provides a composite assembly type bridge expansion joint device, which relates to the technical field of bridge expansion joint devices and comprises an upper plate and a lower plate, the upper plate is arranged at the top of the lower plate, a shear key is arranged between the upper plate and the lower plate, and the upper plate, the lower plate and the shear key form assembly type section steel. The opposite faces of the upper plate and the lower plate are each provided with a cavity, a special-shaped anchor bolt is inserted into one side of the upper plate and one side of the lower plate in a penetrating mode, the cavity of the upper plate and the cavity of the lower plate are combined to form a circular cavity, and water stop belt side edge lug belts are arranged in the two cavities. When the assembly type profile steel is used, the polished rod end of the special-shaped anchor bolt and the embedded steel bar are welded together, then the pressing filler is poured, and then the lower plate and the upper plate sequentially penetrate through the special-shaped anchor bolt, so that when the profile steel needs to be replaced, the lower plate and the upper plate are fixed through the water stop belt side edge lug belts. And the damaged place can be replaced.

The invention is applicable to the field of biomedical materials, and provides a dental material based on chemically modified polyether ketone ketone as well as a preparation method and application thereof, and the preparation method of the dental material comprises the following steps: sequentially sulfonating polyether ketone ketone materials to obtain sulfonated polyether ketone ketone materials; carrying out chemical modification treatment of one or more of amination, hydroxylation and carboxylation on the sulfonated polyether ketone ketone material to obtain a chemically modified polyether ketone ketone material; and filling the surface of the chemically modified polyetherketoneketone material with dental resin to obtain the dental material. Amino, hydroxyl or carboxyl is grafted to the surface of the polyetherketoneketone material through a chemical method, the shear bonding strength between the polyetherketoneketone and dental resin can be remarkably improved, and the hydrophilicity of the material is improved.