30results about How to "Improve compressive stiffness" patented technology

In a method for chassis control of a motor vehicle which has at least one wheel suspension, a vehicle body, and a shock absorber having a rebound stage, whose stiffness is adjustable, and a compression stage, whose stiffness is adjustable, the stiffness of the compression stage is changed for a compressive load of the shock absorber generated by a specific vehicle body movement, and the stiffness of the rebound stage is additionally changed for a subsequently following tensile load of the shock absorber generated by the specific vehicle body movement, or the stiffness of the rebound stage is changed for a tensile load of the shock absorber generated by a specific vehicle body movement, and the stiffness of the compression stage is additionally changed for a subsequently following compressive load of the shock absorber generated by the specific vehicle body movement.

The invention discloses a method for improving stress performance of a negative bending moment zone ofa steel-concrete combined multi-box continuous beam bridge. The continuous girder bridge built by using the method comprises multiple horizontally connected separate small box beams. The upper portion of each small box beam is a concrete bridge surface plate. The lower portion is a steel box beam. The concrete bridge surface plate and the steel box beam are connected into an integral body by the shear force of the top flange of the steel box beam. Normal stress steel bars and constructional steel bars are arranged in the concrete bridge surface plates of the whole bridge. Normal horizontal and longitudinal stiffening ribs are arranged in the steel box beams. The longitudinal stress steel bars in the concrete bridge surface plates of the negative bending moment zone are intensified in density. After the steel box beams is erected, the surface plates are grouted and the preformed holes are prepared, concrete is grouted in the steel beam base plates of the negative bending moment zone through the holes, the concrete grade is identical to the concrete grade of the bridge surface plates. The method can increase the compression strength of the steel box beam base plate, improve the unfavorable stress condition that the steel box beam base plates in the negative bending moment zone is bent by pressure.

The invention discloses a high-capacity cylindrical lithium ion battery. Tab-position end face is shaped; a high frequency oscillation and pressure are applied on to make the foil bodies softened in the scope of 0.1-6.5 mm. At the instant of high-frequency oscillation, the rigidity of the foil body is greatly decreased; and the foil bodies are mutually wound and compressed together, so that the weight density of the foil body in unit volume is increased and meanwhile, the rigidity of the compressed foil body at the Tab-position end face is greatly increased, thereby laying a firm foundation for laser welding of the 1 Tab-position end face and a current collector, increasing a laser welding effective area of the Tab-position end face and the current collector, and improving the welding strength.

A pneumatic tire comprises a spiral belt formed by spirally winding a cord(s) along a circumferential direction of a torus tread, wherein the spiral belt is comprised of at least one layer constructed with a combination of two different cords each having an initial tension of not less than 50 cN/cord.

Apparatus for enhancing pushability and minimizing kinking of a balloon catheter is provided, wherein a catheter comprises inner and outer tubes, and a balloon that is proximally affixed to the outer tube and distally affixed to the inner tube. The catheter of the present invention further comprises a tubular member imposed on the inner tube which is configured to form a reversible mechanical linkage between inner tube and outer tube while an axially compressive load is applied to the catheter tip.

The invention discloses a pneumatic membrane compression bar and a manufacturing method thereof and belongs to the field of pneumatic membrane structures. The pneumatic membrane compression bar comprises a bar end enclosure (1), a tubular air bag (2), reinforcing membrane materials (3), a sealing rubber ring (4), buried ropes (5), a thermal bonding seam rib (6), a balancing rib (7), an air inlet (8), an air outlet (9), a bar end steel hoop (10) and a sealing rubber pad (11). The pneumatic membrane compression bar is characterized in that a membrane material and the thermal bonding seam rib (6) are connected to form the tubular air bag (2), and meanwhile, the tubular air bag (2) is internally provided with the balancing rib (7); the inner walls at two ends of the air bag are additionally provided with the reinforcing membrane materials (3), and the buried ropes (5) are embedded in the ends of the air bag; and the tubular air bag (2) is connected with the bar end enclosure (1) by using the bar end steel hoop (10), and meanwhile, construction measures including the sealing rubber ring (4), the sealing rubber pad (11) and the buried ropes (5) are adopted between the tubular air bag (2) and the bar end enclosure (1) so that the pneumatic membrane compression bar is assembled. The pneumatic membrane compression bar has the characteristics of high compression resistant rigidity, light weight, high bearing capability and convenience in deformation compatibility, manufacture and installation.

The invention provides an assembly type prestressed steel pipe concrete column-column connection mode and belongs to the technical field of structural engineering. A connection device comprises a lower column, an upper column, a lower cover plate, an upper cover plate, lower column lifting hooks and prestressed cables. The lower column is provided with two lower column lifting hooks, and the lower column lifting hooks are welded to the two inner surfaces of the upper end of the lower column respectively, play a positioning role in the lifting process of the upper column and play a role in strengthening a joint area after the upper column is lifted. After lifting is completed, cement paste is pumped upwards through reserved holes in the lower cover plate, so that the upper and lower columns are filled with the cement paste. Connection with certain strength is achieved by filling the columns with the cement paste. The connection part of the columns is located near a contraflexure point so that the shear capacity of the columns can be improved by pouring the cement paste. The prestressed cables are fixed through the upper and lower columns, the deformation performance and the compressional stiffness of the columns are improved, the tensile strength of the columns is obviously improved, assembly between structural die blocks is achieved, assembly speed of the members is increased, the assembly quality of the members is improved, and the connection mode sufficiently meets requirements of an assembly type steel structure system and sufficiently adapts to characteristics of the assembly type steel structure system. Through the assembly type prestressed steel pipe concrete column-column connection mode, the construction speed is greatly increased, the construction quality is greatly improved, and the column-column connection mode adapts to the development of assembly type steel structures.

In the tire (1), a region of the tread portion (10) overlapping with a range of 80% of a length of the circumferential belt layer (40) in a tread widthwise direction around a tire equator line CL is a central region CR in the tire radial direction trd, and a remaining region of the tread portion (10) is a terminal region TR, a maximum curvature radius of the arc portion of the central circumferential groove 50a is R1, a minimum curvature radius of the arc portion of the terminal circumferential groove 50b is R2, a maximum depth in the tire radial direction trd from the tread surface (11) to a groove bottom 55a of the central circumferential groove 50a is D1, a maximum depth in the tire radial direction trd from the tread surface (11) to a groove bottom 55b of the terminal circumferential groove 50b is D2, and a relationship of R1/D1≦0.130 and a relationship of R2/D2>0.195 are satisfied.

The invention relates to a semi-assembled bamboo plywood-steel pipe dust collection mountain flour concrete combined column, further relates to a manufacturing method of the semi-assembled bamboo plywood-steel pipe dust collection mountain flour concrete combined column and belongs to the technical field of engineering structure bearing columns. The semi-assembled bamboo plywood-steel pipe dust collection mountain flour concrete combined column comprises a bamboo plywood layer, a steel pipe, a dust collection mountain flour concrete column, steel pull rods and nuts. The dust collection mountain flour concrete column is located in the steel pipe, the bamboo plywood layer is bonded on the outer wall of the steel pipe, and dust collection mountain flour concrete is prepared from cement adulterated with dust collection mountain flour. The steel pull rods are arranged perpendicular to the axial direction of the steel pipe in a crossed mode, the two ends of the steel pulling rods are providedwith the nuts, and the nuts are connected with the steel pulling rods through threads. According to the combined column, a steel pipe-dust collection mountain flour concrete reinforcement strategy isadopted, the slender proportion of the combined column can be reduced, anti-compression instable failure of the large-slender proportion combined column is regulated, the anti-compression strength isimproved to reduce anti-compression deformation and creeping, the anti-compression bearing capacity of the combined column is improved, and traditional decoration technological treatment such as embedding, wrapping, riveting, grinding and coating can be adopted on the surface.

In order to effectively improve the overall rigidity of the box structure and reduce the stress on the web, the invention provides a railway high embankment vertical diaphragm box structure to meet the safety and stability requirements of the railway high embankment slope and to solve the durability problem of the embankment structure. Comprises continuously arranged reinforced concrete box-shapedsegments along the extension direction of the embankment, wherein each reinforced concrete box-shaped segment is integrally poured by a top plate, a bottom plate, two side webs and a vertical middlepartition plate located between the two side webs; the upper end of the reinforced concrete box-shaped segment is arranged, and the lower end is respectively consolidated with the top plate and the bottom plate into a vertical middle partition plate; The top plate and the transverse two ends of the bottom plate respectively extend out the same side web plate to form an outer overhanging structure,and the bottom plate is seated on the sand cushion layer; A base bed bottom layer and a base bed surface layer are sequentially constructed on the top plate from bottom to top.

The invention discloses a vibration reduction column composite foundation for a subway station and a vibration reduction method thereof, and the vibration reduction column composite foundation comprises a foundation bottom energy dissipation composite structure located at the bottommost part of the whole foundation; the two special-shaped U-shaped supports are arranged on the upper portion of the foundation bottom energy dissipation composite structure and comprise the first special-shaped U-shaped support and the second special-shaped U-shaped support, and the first special-shaped U-shaped support comprises a first upper horizontal supporting plate and a first lower horizontal supporting plate which are arranged in parallel; a lead rod is arranged in the center of the foundation bottom energy dissipation composite structure, and the two sides of the lead rod are each of a multi-layer viscous-elastic material composite steel plate structure. Vibration generated by the whole station can be effectively reduced, the multi-layer and multi-dimensional vibration reduction effect is achieved, the main structure of the station is effectively prevented from cracking due to long-term vibration, and the safety of long-term operation is guaranteed.

The invention discloses a corrugated steel plate recycled concrete anti-seismic sound-insulation shear wall. The shear wall comprises an anti-seismic energy consumption structure, a damping sound-insulation structure and a bearing structure, wherein the anti-seismic energy consumption structure comprises a plurality of strip-shaped steel plates, edge beams, edge columns and inclined supports; thedamping sound-insulation structure comprises steel plates, elastic cement gum, corrugated steel plates and steel partition plates; the bearing structure comprises recycled concrete, corrugated steel plates, studs and the like; and the bearing structure, the damping sound-insulation structure and the anti-seismic energy consumption structure are sequentially arranged from inside to outside to formthe shear wall. The shear wall can overcome the defects of an existing steel plate shear wall and has the advantages of being resistant to seismic, insulating sound, reducing construction waste and the like.