34 results about "Eccentric compression" patented technology

The invention discloses a construction method for excavating an upside-down well wall of a deep foundation pit under an eccentric compression working condition. The construction method is suitable for an asymmetric load scene that the soil covering height of one side of a vertical shaft is obviously larger than that of the other side of the vertical shaft. The method comprises the steps that firstly, grouting is conducted on the periphery of the shaft wall of a vertical shaft under the current ground, and a soil body reinforcing area is formed; then, a mouth locking ring beam is constructed at a shaft mouth of the vertical shaft, an upper structure comprising a retaining wall, a reverse pressing plate, a retaining wall ring beam and a plate support is upwards constructed on the mouth locking ring beam, and soil covering side earthwork is synchronously backfilled to the level ground elevation in the construction process; next, an upside-down well wall method is adopted for subsection downward excavation, an annular arch frame, angle braces and anchor rod supports are constructed after each section is excavated, and an upper ring beam and a lower ring beam are arranged at the horsehead position and connected with the adjacent arch frames through vertical supports; and finally, concrete bottom sealing is conducted on the shaft completion face. The anti-overturning moment is formed through the reverse pressing plate and synchronous backfilling, and the problem of well wall instability caused by eccentric loads is effectively solved in combination with a multi-stage supporting system.

The compression roller assembly of the vertical type circular mould granulator comprises an eccentric compression roller piece and an adjusting assembly, after a driving force is applied to an adjusting rod, a rotating shaft is driven to rotate through an adjusting plate, and the eccentric compression roller piece is driven to rotate through the adjusting assembly. A gap between the eccentric compression roller piece and a mold on the vertical ring mold granulator is adjusted; and a thinning groove is formed in the adjusting rod. Therefore, the thinning groove is formed in the adjusting rod, the structural strength of the adjusting rod on the part can be reduced through the thinning groove, and the adjusting rod is prone to breakage at the position of the thinning groove or near the position of the thinning groove after being subjected to external force exceeding the preset size; therefore, the eccentric compression roller piece or the mold can be prevented from being damaged due to continuous high-strength confrontation between the eccentric compression roller piece and the mold, so that the structural reliability of the eccentric compression roller piece and the mold can be improved, and the service life of the eccentric compression roller piece and the mold can be prolonged.

The application discloses a modified eccentric compression method considering torsional constraint stiffness of end cross beams. The steps are as follows: (1) obtaining relevant parameters of the beam bridge according to engineering data; (2) calculating the torsional constraint stiffness of the end cross beams to the main beam; (3) calculating the load transverse distribution coefficient at the fulcrum point through the lever principle method, and the single-web section main beam and double main beam bridge are calculated by using a single beam model, and the double-web three main beam and more main beam bridges with multiple pieces are calculated by using a double beam model; (4) calculating the load transverse distribution coefficient of the main beam in the longitudinal bridge direction at any position by the modified eccentric compression method considering the torsional constraint of the beam end; (5) considering the change of the load transverse distribution along the longitudinal bridge direction for the concentrated load, taking the load transverse distribution coefficient at the midspan position for the uniformly distributed load, and then calculating the load effect. The method considers the elastic support of the stiffness of the end cross beam to the torsional deformation of the main beam, and provides a new high-precision method for the load transverse distribution calculation of the box section beam bridge.

The utility model relates to the technical field of geopolymer-foundation concrete combined test piece tests, in particular to a loading device for a tension and compression test of a geopolymer-foundation concrete combined test piece, which comprises a testing machine body, a test piece is arranged on a bottom supporting plate of the testing machine body, a top pressing plate is arranged right above the bottom supporting plate, and a top pressing plate is arranged right above the top pressing plate. The vertical surfaces of the bottom supporting plate and the top pressing plate are square; the loading device further comprises two right-angle plates and a driving part for driving the two right-angle plates to be synchronously close to or away from each other, and the direction in which the two right-angle plates are synchronously close to or away from each other is parallel to the diagonal line of the square surface of the bottom supporting plate; the maximum value of the distance between the two right-angle plates is larger than the length of the diagonal line of the square surface of the top pressing plate. According to the utility model, the test piece is ensured to be positioned at the central position of the bottom supporting plate during each test, so that the eccentric compression of the test piece is effectively avoided.

The application discloses a dry filter box side automatic compression sealing structure, which comprises a compression device, an eccentric compression assembly, a pushing structure, a bearing support and a power assembly. The compression device comprises a compression rod. The compression rod comprises a long section, a short section and an arc-shaped connecting surface. The compression rod is provided with a first compression point and a direct compression position. The eccentric compression assembly comprises an eccentric wheel. The compression rod is horizontally rotated around the compression rod rotating point to be opened and compressed. The compression rod is opened through a tensioning piece to avoid the dry filter box channel. A single section is arranged in the long section of the compression rod, and the single section is provided with an inclination angle. The cross section of the eccentric wheel is a circular or arc-shaped columnar body. The pushing structure is provided with an inclined plane pushing plate with an inclined plane. The inclined plane area is sufficient to cover the outer surface of the eccentric wheel and is provided with redundancy. The inclined plane pushing plate is divided into two sections of functions of an empty load and a substantial compression eccentric wheel. The side compression sealing is designed at the tail end of the pushing process of the power assembly. The front pushing power of the front locking is utilized to realize the overall and comprehensive compression sealing of the side.

The utility model relates to the technical field of carbon tank installation, in particular to a carbon tank installation support with a quick release function, which comprises a support main body and a carbon tank base, the support main body is provided with a through chute matched with the carbon tank base in a guide sliding clamp mode, and eccentric pinch rollers capable of rotating are arranged at four corners of the through chute. The four corners of the carbon tank base are each provided with an arc quick-release groove matched with the corresponding eccentric pressing wheel, when rotating to the vertical state, the eccentric pressing wheels can rotate into the arc quick-release grooves and abut against the bottommost portions of the arc quick-release grooves, and when rotating to the parallel state, the eccentric pressing wheels can rotate into the arc quick-release grooves and abut against the bottommost portions of the arc quick-release grooves. The eccentric pressing wheel is located above the arc quick-release groove and located above the top end face of the carbon tank base, the carbon tank quick-release device further comprises a locking mechanism capable of positioning the eccentric pressing wheel in a vertical state and a horizontal state, the carbon tank quick-release device is convenient and quick to mount and dismount, labor is saved, meanwhile, stability is high, and the stability of the carbon tank during operation is guaranteed.

The application discloses a kind of adjustable pneumatic bellows pressure test special equipment, it is related to bellows detection technical field, including workbench, sealing sleeve, sealing ring, lever arm, cylinder, pressure plate, eccentric compression block, V-shaped positioning block.In the application, eccentric compression block of movable adjustable acts on the axis on the left and right sides of sealing port, to ensure that the compression force is uniform and efficient;Can freely extend and retract and adjust the diameter of sealing surface positioning at will, can quickly position the position of sealing surface in use, prevent the impact on sealing after putting off;Can adjust the width according to the size of each size bellows sealing surface, accurately act on the sealing surface during clamping action to perform compression action;Linkage treatment is carried out to cylinder and V-shaped positioning block, adjust the position of V-shaped positioning block;The structure of sealing ring is designed, so that the sealing ring is convenient for sealing treatment to bellows of different sizes, can link up and adjust the up and down movement of cylinder and the expansion and contraction of sealing ring.

The application discloses a deep foundation pit inverted shaft wall excavation construction method under eccentric compression working condition, and is suitable for an asymmetric load scene in which the earth covering height of one side of a shaft is significantly greater than that of the other side. The method first carries out grouting on the outer periphery of the shaft wall below the present ground surface to form a soil reinforcement area; then a lock mouth ring beam is constructed at the shaft mouth, and an upper structure including a retaining wall, a counter pressure plate, a retaining wall ring beam and a plate brace is constructed upwardly on the ring beam; during the construction process, the earth covering side is simultaneously backfilled to the grading ground surface elevation; then the inverted shaft wall method is adopted to excavate downward in sections, after each excavation section, a circumferential arch frame, an angle brace and an anchor rod support are constructed, and upper and lower ring beams are arranged at the position of a horse head door and are connected with adjacent arch frames through vertical supports; finally, a concrete bottom sealing is constructed at the shaft completion surface. The application forms an anti-overturning moment through the counter pressure plate and the synchronous backfilling, and combines a multi-stage support system, so that the shaft wall instability problem caused by eccentric load is effectively solved.

The application discloses a large-angle spherical hinge support for a column double eccentric compression test, which comprises a bottom plate, a spherical hinge assembly is arranged on the bottom plate, the upper end of the spherical hinge assembly is connected with a spherical hinge plate, an upper sliding rail group is arranged at the spherical hinge plate, a lower sliding rail group is arranged at the bottom plate, a connecting rod assembly is arranged between the upper sliding rail group and the lower sliding rail group, and the connecting rod assembly ensures large-angle rotation of the spherical hinge assembly. The large-angle rotation is realized by adjusting the matching relationship between the hemispherical body in the spherical hinge plate and the groove body in the bottom basin, and the upper sliding rail group and the lower sliding rail group provide a sliding and rotating adjustment support base for the connecting rod assembly. The large-angle bidirectional rotation can be realized by the sliding steel bars and the connecting rod assembly, the spherical hinge plate and the bottom basin are in surface-to-surface contact, the contact stress area is larger than that of the traditional line contact, the peak stress on the contact surface is reduced, meanwhile, the connecting rod assembly on the outer side can limit the maximum displacement of the bidirectional hinge of the support, and the test piece is prevented from being separated from the support.

The application provides a device and a method for testing the out-of-plane eccentric compression performance of a plate component, characterized in that the device comprises a lower pressure plate, an upper pressure plate, a knife corner and a parallel roller, wherein the lower pressure plate is fixed on the end face of the free end of the plate component; the upper pressure plate is arranged on the lower pressure plate; the knife corner is welded below the upper pressure plate; and the parallel roller is limited on the end face of the upper pressure plate away from the lower pressure plate and can roll on the upper pressure plate; when the eccentric compression test is performed, the pressure of the pressure device acts on the parallel roller, the parallel roller rolls under pressure and transmits the eccentric force to the plate component through the upper pressure plate and the lower pressure plate. The device eliminates the horizontal force at the knife corner, ensures that the direction of the load is always vertical downward during the loading process, and can achieve better test results.

The present application relates to a kind of skewback type abutment stress calculation method, the force and bending moment of abutment are converted, including axial pressure N, longitudinal shear force Fx, horizontal shear Fz, longitudinal bending moment Mz, transverse bending moment Mx and torque My, then according to stress balance, force and moment are distributed in the abutment slope and its vertical imaginary plane, i.e. the stress of any point on the abutment slope and imaginary plane can be directly calculated using the stress formula of eccentric compression rectangular section, abutment slope, imaginary plane and base horizontal plane form right triangle geometric relationship, can be calculated according to the geometric projection relationship, vertical stress balance and bending moment balance, the base stress of any point on base horizontal plane, greatly simplify the calculation process, the method is solved according to the most direct direction of force transmission path, the solution result is also the actual stress of abutment base, not component force, and the calculation method is simple and applicable.

This invention provides a data acquisition and processing method and system for axial and eccentric static load tests on ECC-strengthened concrete columns, belonging to the field of structural testing and data acquisition and processing technology. This method simultaneously acquires sensor data and image data, first identifying cracks and then performing data preprocessing. Furthermore, by using the crack information set and the installation position of each preset sensor, it dynamically generates axial and eccentric compression correction parameters, achieving refined correction of the initial stress information. This method effectively solves the shortcomings of traditional methods, such as the accidental deletion of key damage data and the lack of quantification of the impact of multiple microcracks, significantly improving the accuracy of test data and providing reliable support for the mechanical performance evaluation of ECC-strengthened concrete columns.

The present application relates to a kind of corrosion reinforced concrete column eccentric compression bearing capacity analysis method, comprising the following steps: measuring and calculating the basic parameters of eccentric compression reinforced concrete component before and after corrosion;Based on the basic parameters, the limit corrosion rate of eccentric compression concrete component is calculated, and the eccentric compression failure mode is determined;Analysis of the eccentric compression bearing capacity of the eccentric compression reinforced concrete component corresponding to different eccentric compression failure modes.Compared with the prior art, the present application is based on the stress state of the reinforcement on the side far from the axial force (i.e. far side) and the side close to the axial force (i.e. near side) in the eccentric compression column when the normal section fails, realizes the normal section bearing capacity calculation of the eccentric compression reinforced concrete component when the reinforcement on the far side and the near side is arbitrarily corroded, the highest order equation for solving is a quadratic equation, has the advantages of clear concept and simple calculation, can quickly and accurately analyze and evaluate the normal section bearing capacity of the eccentric compression reinforced concrete component.

The invention relates to a compressed member loading device capable of finely adjusting an eccentric direction and an eccentric distance, comprising: an upper loading mechanism comprising an upper cutter reaming plate fixed on an actuator, an upper connecting plate, an upper cutter reaming piece, and an upper hooping assembly fixed on the lower surface of the upper connecting plate, the upper hooping assembly is used for fixing the top of a channel steel test piece, and the upper hooping assembly is used for fixing the top of the channel steel test piece; the eccentric state of the channel steel test piece around a strong axis or a weak axis can be adjusted; the lower loading mechanism comprises a lower cutter reaming plate fixed on the counter-force cross beam, a lower connecting plate positioned above the lower cutter reaming plate, a lower cutter reaming piece arranged between the lower cutter reaming plate and the lower connecting plate, and a lower hooping assembly fixed on the upper surface of the lower connecting plate, and the lower hooping assembly is used for fixing the top of a channel steel test piece; and the eccentric state of the channel steel test piece around a strong axis or a weak axis can be adjusted. Compared with the prior art, the device can meet the requirements of finely adjusting eccentricity around a weak axis or a strong axis and the eccentric distance in a channel steel eccentric compression test.

An arm quick plugging and locking mechanism of a multi-rotor unmanned aerial vehicle for power construction comprises an arm assembly, and the arm assembly is provided with an arm mounting structure in a matched mode; a first eccentric pressing rod is arranged on the vehicle arm mounting structure, and an eccentric rotating shaft is arranged on the first eccentric pressing rod. Compared with the technical scheme that in the prior art, once an unmanned aerial vehicle arm is damaged or needs to be replaced, a professional often needs to conduct complex disassembly, the technical scheme has the beneficial effects that the unmanned aerial vehicle arm rapid inserting and pulling locking mechanism is arranged; by arranging the two eccentric clamping mechanisms on the arm assembly, the load of the arm is uniformly transmitted to the fuselage while the rotation limitation of the eccentric clamping mechanisms is realized, and the reliability of the arm assembly after the arm assembly is fixed in the arm mounting structure is improved. The stability of the whole unmanned aerial vehicle system is improved.

The invention relates to the technical field of steel structure lifting, and discloses a construction method of a reversible deformation measure in an eccentric pressed state of a large-cantilever roof supporting column, which comprises the following steps of: mounting the roof supporting column, assembling a roof truss on the ground, and mounting a lifting frame serving as a lifting point position at the top of the roof supporting column; the supporting part is installed on a roof supporting column; and a lifter is installed on a lifting frame on the top of the roof supporting column, the supporting part and the lifter are connected through a steel strand, and the steel strand is tightened. The problem that deformation of one side of the large cantilever column top is too large when the large cantilever column top bears eccentric loads is effectively solved, the stability and accuracy of a main body structure in the large-span steel structure lifting construction process are greatly improved, steel column side inclination is prevented, the safety in the large-span steel structure lifting process is improved, operation is easy and convenient, materials are simple and easy to find, and cost is low. The construction efficiency is greatly improved, the cost input is reduced, the construction period is shortened, and the construction safety is guaranteed.

This invention provides a fluid-circulating magnetorheological brake with eccentric reinforcement, comprising an input shaft cylinder and a camshaft. One end of the input shaft cylinder is provided with a cylindrical section, and a camshaft is coaxially arranged inside the cylindrical section. A first disk is provided on the end face of the camshaft facing away from the input shaft cylinder, and a second disk is provided on the end face of the input shaft cylinder facing away from the camshaft. A first guide rail and a second guide rail are provided opposite to each other on the end faces of the first disk and the second guide rail. The first guide rail is slidably connected to a first sliding assembly, and the second guide rail is slidably connected to a second sliding assembly. A first brake disc is provided on the camshaft, and a second brake disc is provided on the input shaft cylinder. When torque is input, the two brake discs generate eccentric compression, causing the magnetorheological fluid to produce a compression reinforcement effect. The shear yield stress of the magnetorheological fluid is increased, promoting the flow of the magnetorheological fluid, facilitating heat dissipation of the magnetorheological fluid, reducing the impact of temperature rise on the performance of the magnetorheological fluid, and outputting a larger and more stable braking torque.

The utility model discloses a filling type adjustable end, which belongs to the technical field of steel structure foundation pit support, and comprises a fixed part and a movable part, the fixed part comprises a mounting plate, the mounting plate is used for connecting a steel support, the mounting plate is fixedly connected with a fixed column, a filling bin is arranged in the fixed column, one side of the fixed column close to the mounting plate is provided with a liquid injection pipe, and the liquid injection pipe is communicated with the inside and the outside of the filling bin; the movable part comprises a flange plate, a movable column is fixedly connected to the flange plate, the outer diameter of the movable column is matched with the inner diameter of the filling bin, the movable column can be inserted into the filling bin, and a space formed between the bottom surface of the movable column and the bottom surface of the filling bin is filled with solidifiable slurry. The adjustable end is fixed by filling the solidifiable slurry, so that the adjustable end is convenient to erect in the construction process, the erecting efficiency of the steel support is effectively improved, the problem of eccentric compression of the steel wedge type adjustable end is solved, and the adjustable end has more excellent pre-applied axial force retaining performance and bending resistance; and the stability and the reliability of the steel support structure are greatly improved.

This invention relates to the stress design of lightweight ribbed insulated walls for prefabricated buildings, and discloses a method for calculating the eccentric compression bearing capacity of such walls. This method is implemented through four steps: "section equivalence—second-order effect correction—eccentric bearing capacity calculation—eccentricity limit and design process." First, the side panels, ribs, and edge members are equivalent to multi-ribbed composite sections with side flanges, establishing an effective flange width model that varies with slenderness ratio, rib spacing, number of ribs, and insulation layer thickness. Second, an expression for the stability coefficient explicitly incorporating eccentricity and rib arrangement parameters is proposed. Based on this, the formula for eccentric compression bearing capacity and the applicable eccentricity range are given, along with dimensionless lookup charts to enable rapid engineering design. This method systematically characterizes the composite stress and stability performance of lightweight ribbed insulated walls under eccentric compression, improving the safety and economy of the design.

This utility model discloses a pulse rotary cleaning device for cleaning carbon deposits inside cylinders, relating to the field of engine carbon cleaning. It includes a valve seat and a pulse rotary cleaning assembly. The pulse rotary cleaning assembly includes a guide pipe connected to the outlet end of the valve seat. The outlet end of the guide pipe is connected to an injection pipe via an injection pipe housing. The injection pipe is movably disposed within the injection pipe housing. One end of the injection pipe extending beyond the housing is the injection pipe head. One or more eccentric side injection ports are provided on the side of the injection pipe head. This device, through the eccentric side injection ports on the injection pipe, enables the injection pipe to rotate under the push of compressed air, simultaneously causing the compressed air to rotate and spray out in a fan-shaped pattern. Each sprayed fan-shaped area partially intersects, performing secondary cleaning and achieving 360° circumferential cleaning of the combustion chamber space. Furthermore, the vortex airflow generated by the eccentric compressed air flow through the eccentric injection ports blows away residues from the combustion chamber in all directions.

The utility model relates to a stirrup optimizing device of a shock insulation layer stiff concrete short column. The structure comprises a section steel column and a section steel bracket, closed stirrups on the outer side of a stiff concrete short column are replaced by steel plate hoops, only internal non-closed stirrups are reserved, and the steel plate hoops are connected with a section steel column web through connecting plates. According to the principle of equal-strength replacement, the strength of the steel plate hoop is rechecked by referring to the eccentric compression component of the combined structure, and the width, thickness and spacing of the steel plate hoop are determined. The section steel and the reinforcing steel bars of the shock insulation layer stiff concrete structure can be deepened by combining the three-dimensional model, entrusted to be processed, manufactured and formed by factories and transported to the site for hoisting and mounting. According to the utility model, the construction problem of dense nodes in the beam column area of the stiff concrete structure of the buttress on the shock insulation layer is solved, the on-site welding workload can be effectively reduced, the concrete pouring and vibrating operation is convenient, the on-site construction efficiency is improved, and the forming quality of the stiff concrete structure is ensured.

This invention discloses a method for analyzing axial and eccentric damage of steel-concrete composite columns based on acoustic emission. The key technical features include a frame; the frame is a rectangular structure with a counterweight mounted on it. Four sets of support columns are vertically mounted on the upper surface of the counterweight, and these four sets of support columns collectively support a four-position rotary motor. Four sets of steel-concrete composite column positioning mechanisms are arranged around the center of the upper surface of the rotating platform. By setting up four sets of steel-concrete composite column positioning mechanisms and four-position rotary motors, continuous detection of multiple steel-concrete composite columns can be achieved, effectively improving detection efficiency. The steel-concrete composite column positioning mechanisms, through the coordination of adjusting bolts, clamps, and sliding grooves, can adapt to steel-concrete composite columns of different sizes, ensuring firm and convenient positioning. The acoustic emission vibration detection equipment and acoustic emission detection module can accurately capture the acoustic emission signals of the steel-concrete composite column under axial and eccentric pressure.

The utility model provides a workshop steel structure capable of keeping structural rigidity by tensioning, which belongs to the technical field of steel structure buildings and comprises a rigid frame column, a local two-layer beam, a local two-layer column, a bracket, a rigid frame beam, a fixed seat, a prestressed steel pull rod, a support, an anchor rod, a steel cable and a connecting seat. One end of the steel cable is connected with the steel frame column, the other end of the steel cable is obliquely and upwards straightened to penetrate through the steel frame column to be connected with the connecting seat, so that more loads can be converted into pulling force, the compression area is reduced, and the stability of the structure is improved; the prestressed steel pull rod generates an eccentric compression effect in the rigid frame column through stretching and fixing, and the effect overcomes bending moment generated by partial external load, reduces the external load effect and can compensate local two-layer beam deformation caused by vibration, so that the bending resistance of the local two-layer beam is improved.

The invention provides a method, a device and equipment for determining reinforcement parameters of a protection large plate. The method comprises the following steps: dividing the protection large plate of a target power transmission tower into a plurality of blocks; determining a first longitudinal maximum bending moment of the block under a normal working condition, a longitudinal maximum tensile force under a ground surface horizontal deformation working condition and a second longitudinal maximum bending moment under a ground surface curvature deformation working condition; determining a first area of a longitudinal tensile steel bar of the block according to the longitudinal maximum tensile force; according to the first longitudinal maximum bending moment and the second longitudinal maximum bending moment, determining a second area of a longitudinal bending steel bar of the block; and determining the longitudinal total reinforcement area of the block according to the first area and the second area. In the aspect of determining the reinforcement area of the protective large plate, the influences of horizontal deformation of the earth surface, eccentric compression of the protective large plate and the like under different working conditions are considered, and the reliability of the protective large plate is improved.

The invention discloses a torsional angle measurement auxiliary device and a use method, the device comprises two chucks, and each chuck comprises a plurality of driving wheels, a driven plate, two guide plates and a plurality of fastening clamps. The driven plate is clamped between the two guide plates, the driving wheel is located on the outer side edges of circular rings of the two guide plates and penetrates through the two guide plates, the driven plate is meshed with the driving wheel through a gear on the outer circumference of the driven plate, and the driving wheel, the driven plate and the guide plates are assembled and fixed through a plurality of screws. The chuck is connected with a to-be-tested piece, the driving wheel is rotated, and the to-be-tested piece is clamped by the fastening clamp through the gear and the guide groove; and starting the torsion testing machine to perform a torsion experiment, and measuring a torsion angle by means of a photoelectric encoder. All the fastening clamps are tightened at the same time in a gear rotating mode, the coaxial requirement is automatically met in the fastening process, the experiment operation difficulty is lowered, and the experiment steps are simplified. The phenomenon of eccentric compression easily generated when a single pressure head is fastened is avoided, the chuck is prevented from warping, pressure head hole notches are prevented from being damaged, and the durability of the device is improved.

The invention relates to the technical field of building structures, in order to solve the technical problem of inconvenient construction, the invention discloses a design and construction method of a separated type steel reinforced concrete column convenient to construct, which comprises the following steps: S1, determining the bearing capacity and the internal force of original solid-web type steel reinforced concrete; s2, the section of the separated type steel reinforced concrete column is designed; s3, designing a separated type steel reinforced concrete beam-column joint; the step S2 comprises the following steps: step S21, cancelling a connecting web plate in the solid-web type steel reinforced concrete column, forming a plurality of pieces of independent section steel which are symmetrically distributed in a section, and adjusting the strong axis direction and the weak axis direction of the section steel according to the magnitude of internal force; step S22, checking the one-way eccentric compression bearing capacity and the two-way eccentric compression bearing capacity; a connecting web in a solid-web type steel reinforced concrete column is omitted and converted into the separated type steel reinforced concrete column, so that a plurality of pieces of independent section steel are symmetrically distributed in the section, the arrangement mode of the section steel is optimized, and the machining and mounting workload of the connecting web is reduced.

This invention belongs to the field of experimental technology for eccentrically compressed components, specifically relating to an eccentrically compressed loading device for steel lattice columns and its loading method. It includes a test bench, with an upper loading component fixed to the upper end of the test bench. The upper loading component is fixedly connected to a vertical reaction frame via a constraint component. The upper loading component includes a loading box component, with a steel sleeve structure externally disposed on the loading box component. The steel sleeve structure is fixedly connected to the side wall of the actuator cylinder via turnbuckles. A hydraulic actuator and an eccentric structure are disposed between the actuator cylinder and the steel sleeve structure. This invention closely matches the boundary conditions and stress state of eccentrically compressed steel lattice columns with rigid column bases and hinged column tops in actual engineering. It effectively solves the problems of localized damage to the steel column head and the tendency for overall in-plane lateral displacement of steel lattice columns during eccentric loading. It exhibits strong experimental stability, convenient installation, and simple operation, and can meet the requirements for eccentric loading devices for other types of large-size steel components.

The utility model provides an active monitoring device for traffic facilities, which comprises a base, a mounting plate is mounted on the base, a monitor body is mounted on the mounting plate, a fixing mechanism is arranged on the mounting plate, an adjusting mechanism is further arranged below the monitor body, and the adjusting mechanism is connected with the monitor body. The fixing mechanism comprises a first double-layer clamping plate fixedly mounted on the mounting plate, and a first mounting hole is formed in the first double-layer clamping plate. According to the utility model, through cooperation of the fixing mechanism and the adjusting mechanism, stable installation and flexible angle adjustment of the monitor body are realized. The fixing mechanism adopts a double-layer clamping plate, an eccentric pressing rod and other parts, and firm installation is ensured.

This invention belongs to the technical field of spring testing equipment, specifically relating to a high-stress spring fatigue testing device, including a base and a gantry frame. The top of the base is provided with a worktable suitable for placing the spring. The gantry frame is located on top of the base, and a testing rod is provided on the side of the gantry frame facing the worktable. A lifting mechanism is provided between the testing rod and the gantry frame. The top of the worktable has two opposing movable plates, and a scrap bin is opened on the middle surface of the worktable. Both movable plates cover the top opening of the scrap bin. The purpose is to provide a sleeve for the spring to be fitted, and with the cooperation of the sleeve cavity inside the testing rod and the pressure ring at the opening, the top of the sleeve can be inserted into the sleeve cavity, ensuring the coaxiality of the testing rod and the sleeve, achieving precise alignment of the spring and the testing rod without manual alignment, simplifying the operation process, and avoiding test deviations caused by eccentric compression, thus improving the accuracy of the test results.