65 results about "Lateral stiffness" patented technology

A damping partition wall design method having variable friction energy dissipation, comprising the following steps: establishing an empty frame model which does not consider the lateral stiffness resistance of a partition wall, and calculating the inter-story shear force and inter-story displacement of a structure under the action of an earthquake; calculating the elastic strain energy of the structure, and determining an expected additional damping ratio provided by the damping partition wall for the structure; determining a friction damping force-sliding displacement curve of a single group of damping partition walls, and establishing a relational expression of total friction hysteresis energy dissipation and the friction damping force and target sliding displacement of the single group of damping partition walls; comparing a calculated additional damping ratio and the expected additional damping ratio to obtain the relationship thereof, and determining the friction damping force requirement of the single group of damping partition walls; designing elastic pieces; designing anti-shearing connecting pieces; and carrying out damage control verification. According to the damping partition wall having variable friction energy dissipation, parametric design and adjustment are carried out on the basis of the design goal of the structure, so that there are regulations to follow in the design of such a damping partition wall, and the anti-seismic toughness of the partition wall and structure can be synergistically improved.

The invention discloses a parameter optimization and reliability evaluation method for an active suspension control system of a high-speed train, and the method comprises the steps: combining a kinetic model with a multi-objective optimization algorithm; an active suspension secondary vertical stiffness parameter, an active suspension secondary transverse stiffness parameter, an active suspension primary radial stiffness parameter and an anti-snaking shock absorber stiffness parameter of the high-speed train are respectively used as design variables, and curve passing performance, a sperling index and a critical speed in the operation of the high-speed train are optimized; and when the optimization reaches the maximum iteration parameter and the obtained pareto optimal parameter combination meets the constraint condition, verifying the safety, stability and stability of the high-speed train until reaching the standard, thereby verifying the reliability of the active suspension control system, and finally evaluating the reliability of the active suspension control system of the high-speed train. Therefore, the running performance and the line adaptability of the train are improved.

The application provides a spring bidirectional composite metal rubber damper and a working method thereof. The spring bidirectional composite metal rubber damper comprises a vertically arranged outer sleeve, one end of the outer sleeve is closed, the other end of the outer sleeve is internally provided with an inner sleeve, one end of the inner sleeve is closed, the other end of the inner sleeve is movably connected with a core shaft, an annular clamping shoulder is arranged in the middle of the inner sleeve, the annular clamping shoulder divides the inner sleeve into an upper damping cavity and a lower damping cavity, the shaft section of the core shaft located in the upper damping cavity is externally provided with an upper damping pad, the shaft section of the core shaft located in the lower damping cavity is externally provided with a lower damping pad, a lower connecting mechanism is arranged on the closed end of the outer sleeve, the end of the core shaft extends out of the open end of the inner sleeve, and an upper connecting structure is arranged on the extending end. The application is convenient for damping of aerospace, aviation, nuclear industry and military instruments, can solve the poor rigidity adjustability of the current single metal rubber damper, that is, it is difficult to realize the coordination between low rigidity and high durability, meanwhile, the structure has high lateral rigidity and compact structure.

The application discloses a spatial spiral compliance mechanism with a variable stiffness characteristic, comprising a variable stiffness component, a bending component and a fixed base, wherein the variable stiffness component comprises a rigid element, two first leaf-shaped flexible hinges and a variable stiffness module, the two first leaf-shaped flexible hinges are oppositely arranged, and opposite ends of the two first leaf-shaped flexible hinges are respectively connected with the rigid element and the fixed base; the rigid element, the two first leaf-shaped flexible hinges and the fixed base enclose a containing space, the containing space is provided with the variable stiffness module, the fixed base is provided with a containing groove, the bending component is connected with the inner wall of the containing groove, and opposite ends of the variable stiffness module are respectively connected with the rigid element and the bending component; the rotation angle of the variable stiffness module is controlled by input displacement of a driver, the continuous and accurate adjustment of the lateral stiffness of the rigid element can be realized, the variable stiffness module can be quickly adjusted to a suitable stiffness value according to different working requirements, and the adaptability of the spatial spiral compliance device is greatly improved.

A pocketed spring assembly comprises a plurality of parallel strings of individually pocketed springs. A dimensionally stabilizing substrate is secured to at least some of the strings on one of the top and bottom surfaces of the strings. A scrim sheet is secured to at least some of the strings on an opposed surface of the strings to maintain the positions of the strings. The dimensionally stabilizing substrate is laterally rigid enough to maintain length and width dimensions of the coil spring assembly. However, the dimensionally stabilizing substrate is flexible enough to allow the pocketed spring assembly to be roll packed for shipping.

The invention discloses a design method of an integral swing self-resetting structure for mounting a tension-compression energy-dissipation support, and relates to the technical field of civil engineering earthquake resistance, and the integral swing self-resetting structure comprises a tensile limiting device and a compression limiting device; the method specifically comprises the steps that a structural mechanical model is established, and the lateral stiffness of a traditional fixed foundation is calculated; setting a rigid body displacement ratio to determine the vertical and horizontal rigidity and strength of the support; carrying out finite element push-and-cover analysis to verify a rigid body displacement ratio; setting an additional damping ratio; carrying out seismic response spectrum analysis on the vertical seismic isolation structure; calculating the vertical natural vibration period of the structure and adjusting the rigidity according to the response spectrum; carrying out elastic-plastic time-history analysis to detect an interlayer displacement angle, acceleration and structural damage; checking the consistency of the additional damping ratio and the actual energy consumption; and finally, anti-overturning checking calculation under extremely rare earthquake is carried out to ensure that the support and the limiting device are in an elastic state. The energy dissipation capacity and anti-seismic safety of the structure can be effectively improved, and the structure is suitable for various building structures needing vertical and horizontal seismic isolation.

One embodiment relates to a tyre with a bead profile structure, comprising a tread, sidewalls, and beads 10 for improving lateral stiffness, wherein the bead (10) has a range in which the X-coordinate is 8.8-9.7 mm and the Y-coordinate is 19.2-21.7 mm from origin (O), which is a common European Tyre and Rim Technical Organization (ETRTO) rim standard reference point of a bead outermost point (P) that is in contact with a wheel rim.

The RC column concentrated plastic hinge model research method based on lateral stiffness relates to the structural seismic technology field; the method aims to solve the problem that the simulation precision of the existing concentrated plastic hinge model is influenced by the value of the multiplier n, and the function relationship between the spring rotation stiffness and the component lateral stiffness is established, without defining the multiplier n; the specific steps include deducing the concentrated plastic hinge series model unit stiffness matrix of the cantilever column, establishing the function relationship between the rotation stiffness and the lateral stiffness, designing the state updating algorithm based on the displacement loading control, verifying the accuracy of the new model, and comparing the precision of the existing model; the experimental results show that the simulation precision of the model is improved significantly, the nonlinear behavior of the RC column can be accurately simulated without the multiplier n, and the method has important practical significance; the method has been successfully applied to the seismic analysis of a plurality of typical RC frame structures, not only simplifies the calculation process, but also improves the calculation efficiency, provides a more reliable and convenient tool for the structural seismic design, and has high popularization value.

The present application relates to a new type of shock control structure system, which is mainly applied to frame structure, the system first sets negative stiffness device to reduce the lateral stiffness of the structure, prolongs its period, and reduces the seismic action; then sets viscous damper to improve the damping ratio of the first floor, controls displacement and damage; finally, in order to further control the damage of the first floor column, the first floor beam and column adopt high-performance materials, such as high-performance concrete, high-strength steel bars, high-strength steel, etc. Compared with the prior art, the present application adopts a kind of shock absorption technology, and the shock absorption effect is higher than that of the prior art; in addition, through high-performance materials and damping, the deformation and damage of the first floor are controlled, compared with shock isolation, the structure is simple, and there is no need to set up shock isolation ditch, shock isolation joint and other structural measures. The technology combines the characteristics of shock absorption, shock isolation and seismic resistance, improves the shock absorption effect, reduces the complex structural measures, and can adjust and control the shock absorption effect by increasing or decreasing the negative stiffness and damping device, so as to achieve the purpose of "controlling shock".

The utility model belongs to the technical field of flexible structure design, and particularly relates to a height-variable supporting column structure which comprises a shell, a series butterfly-shaped flexible device and a driving device. The shell is in a regular hexagon shape, the interior of the shell is of a hollow structure, the top of the shell is open, the series butterfly-shaped flexible device and the driving device are both arranged in the shell, the series butterfly-shaped flexible device comprises multiple sets of flexible plates stacked up and down, round holes are formed in the centers of the flexible plates, and the flexible plates and the shell are coaxially arranged; the driving device and the shell are coaxially arranged; when the height of the supporting column needs to be adjusted, the driving device drives the multiple sections of column bodies to slide up and down, meanwhile, the flexible plate stretches or contracts under the elastic force of the flexible plate, and therefore height adjustment of the supporting column is achieved, the structure is simple, and control is stable. Meanwhile, in the process of changing the height, the height-variable supporting column has enough lateral rigidity to resist lateral load and torque load, and the process is simple and easy to implement.

The invention provides a wood structure truss type reinforcing system with composite energy consumption and self-resetting, which belongs to the technical field of ancient building wood structure reinforcement and comprises a wood upper cross beam, a wood lower cross beam, a viscous damping device, a spring device and a friction energy consumption device. The additional wooden upper cross beam is rigidly connected with the common square columns on the two sides, so that the transverse rigidity and integrity are remarkably enhanced, and weak links at the joints of the bracket set and the common square columns are eliminated; through cooperative work of a plurality of adjustable viscous damping devices, spring devices and friction energy dissipation devices, the energy dissipation capacity is improved in a grading mode, and meanwhile the swinging and self-resetting functions of the wooden column are reserved.

The application discloses a deformation controlled corner brace with external metal energy absorber, which comprises an inner metal rod, an outer metal tube, a standby pull rod system, a connecting plate, a compression elastic pad and an external metal energy absorber. The inner metal rod is inserted into the inner part of the outer metal tube and is connected by the standby pull rod system in the inner part, and is connected by the external metal energy absorber on the outer surface. The inner part of the outer metal tube is provided with the compression elastic pad at the bottom end. The standby pull rod system limits the maximum tensile deformation of the inner metal rod relative to the outer metal tube, and the compression elastic pad reduces the impact of the inner metal rod on the outer metal tube. The application has the beneficial effects that when the structure bears the design expected earthquake effect, the application can dissipate the earthquake energy by the plastic deformation of the external metal energy absorber, when the structure bears the great earthquake effect and the structure deformation is large, the corner brace can be degraded into a force bearing support, the maximum deformation of the structure is limited, the lateral stiffness of the structure is improved, and the anti-collapse performance is improved.

The application aims to provide an improved method for considering the lateral stiffness and the corner stiffness of the spline coupling with misalignment, comprising the following steps: establishing a schematic diagram of the load and deformation of the misaligned spline coupling, deducing the load and deformation balance equation of the misaligned spline engagement state according to the deformation geometry of the misaligned spline; deducing the single-tooth engagement stiffness according to the energy method, correcting the gear tooth engagement stiffness; bringing the single-tooth engagement stiffness of the spline obtained in step (2) into the engagement force balance equation obtained in step (1), and calculating the lateral stiffness and the corner stiffness of the misaligned spline coupling. Through comparison with the finite element results, the calculation results of the application are more efficient, and the vacancy of the calculation method of the lateral stiffness and the corner stiffness of the spline coupling under the misalignment condition at the present stage is made up.

The invention relates to the technical field of tire finite element simulation design, in particular to a method, a system, a medium and a software product for calculating contribution of a tire part to radial rigidity. The method comprises the steps that a two-dimensional tire finite element model is established, inflation pressure is applied, a three-dimensional model is generated, a load is applied, and the radial rigidity of a complete tire is calculated; the Young modulus of the target part is reduced to 0.01%-5% of a design value, simulation is repeated, and rigidity after modification is calculated; and calculating a rigid contribution value and a contribution rate of the component through a difference value between the two values. The system comprises a finite element modeling module, a simulation module, an attribute adjustment module and a rigidity analysis module. On the premise of ensuring the continuity of a simulation structure and the consistency of working conditions, the method can accurately peel off the contribution of the component, is suitable for different tire structures, and has the advantages of high precision, high universality, low cost and the like.

The application discloses a multi-dimensional vibration isolation support, which comprises a horizontal vibration isolation support, a conversion base and a constraint box arranged in sequence from top to bottom; the horizontal vibration isolation support is fixed on the upper end of the conversion base; the constraint box is filled with an elastic deformation component; the lower end of the conversion base extends into the constraint box, the lower end of the conversion base is tightly matched with the inner wall of the constraint box, and the lower end of the conversion base is in contact with the upper surface of the elastic deformation component; the horizontal vibration isolation support has small lateral stiffness, can produce large deformation under the action of horizontal earthquake or vibration, and realizes the transmission of horizontal force to the top; the elastic deformation component is filled in the constraint box, and the conversion base is in contact with the elastic deformation component, the elastic deformation component can produce deformation under the action of vertical force, effectively reduces the transmission of vertical high-frequency vibration to the top, and realizes the control of horizontal earthquake and vertical vibration, so that the mechanical equipment or building is not affected by vibration.

The application provides a wheel with spiral spokes, comprising a rim and a spoke, the spoke being arranged at an axial end of the rim; the spoke comprises a central mounting disc, a plurality of spiral spokes and a spoke outer edge, at least one ventilation hole being formed between two adjacent spiral spokes in the plurality of spiral spokes; wherein the extending direction of the spiral spokes deviates from the radial direction of the spoke; the central mounting disc has a plurality of groups of ventilation holes, the plurality of groups of ventilation holes being arranged at intervals in the circumferential direction of the spoke, each group of ventilation holes comprising a plurality of ventilation holes; the cross-sectional areas of the hole sections of the ventilation holes in at least the same group of ventilation holes are uniform; and the cross-sectional areas of the hole sections of the ventilation holes in at least two groups of ventilation holes are different. The application solves the problems of insufficient lateral stiffness and stress concentration of the wheel in the prior art, the excessive weight of the wheel, and the unreasonable design and layout of the ventilation holes of the existing wheel, which leads to the problem of incoherent airflow through the wheel.

The utility model discloses a wheel which comprises a spoke and a rim, the outer edge of the spoke is fixedly connected with the rim of the rim, the wheel further comprises a lateral reinforcing piece arranged on the inner side of the rim, a center connecting hole is formed in the center of the spoke, and the lateral reinforcing piece is arranged on the inner side of the rim. The first end of the lateral reinforcing piece is fixedly connected with the spoke to form a first connecting part, the first connecting part is located between the center connecting hole and the outer edge of the spoke, the second end of the lateral reinforcing piece is fixedly connected with the inner wall of the rim to form a second connecting part, and the second connecting part is located between the center connecting hole and the inner wall of the rim in the axis direction of the rim. And a space is formed between the second connecting part and the connecting part of the spoke and the rim. The wheel provided by the utility model has better lateral rigidity.

The utility model relates to the technical field of brake pedals, and discloses a shaft sleeve structure for increasing the lateral rigidity of a brake pedal, which comprises a pedal arm and a bracket for mounting the pedal arm, and further comprises a main shaft body for connecting the pedal arm and the bracket, and two shaft sleeves sleeved on the side surfaces of the main shaft body, the shaft sleeve comprises main shaft sleeves arranged on the side faces of the main shaft body in a sleeving mode and an extrusion ring located between the pedal arm and the support, first assembly grooves matched with the two main shaft sleeves are formed in the opposite side faces of one end of the pedal arm in a penetrating mode, and second assembly grooves matched with the main shaft body are formed in the opposite side faces of the support in a penetrating mode. According to the utility model, the widened and enlarged extrusion ring is arranged, and the extrusion ring is trumpet-shaped, so that interference fit assembly is realized for the distance between the bracket and the pedal arm during assembly, the requirement on a required size chain is reduced, a certain force lag is provided, the rigidity of the two sides of the pedal arm is improved, and the driving comfort is improved.

The present application belongs to the field of civil engineering, and relates to a method for determining the size of a circular arc cut corner of a steel frame embedded filler wall. The embedded wall plate is provided with a circular arc cutout, and the circular arc cutout is located at the corner of the embedded wall plate. The steel frame embedded circular arc cut corner filler wall has good seismic performance, can delay the cracking of the wall plate, and improve the ductility of the system. The lateral stiffness of the steel frame, the lateral stiffness of the filler wall, and the width of the equivalent diagonal strut are obtained by an equivalent diagonal strut model. A group of ABAQUS finite element models are established with the size of the circular arc cut corner of the filler wall as a parameter. The width of the equivalent diagonal strut model is corrected according to the simulation results. Then, a formula for calculating the ductility coefficient of the system is derived, and a relationship curve between the circular arc cut corner and the ductility coefficient of the system is drawn. The optimal size of the circular arc cut corner is determined by the critical point. The method for determining the size of the steel frame embedded filler wall circular arc cut corner combines theoretical analysis with finite element analysis, and provides a reasonable and reliable analysis method for the application of the steel frame embedded circular arc cut corner filler wall in actual engineering.

This invention provides a vibration isolator suitable for a satellite momentum wheel vibration isolation support, comprising a first retaining block (2a), a connecting block (3), and a second retaining block (2b) arranged sequentially; it also includes two symmetrically arranged first elastic components (1a) connected between the first retaining block (2a) and the connecting block (3), and two symmetrically arranged second elastic components (1b) connected between the connecting block (3) and the second retaining block (2b); damping energy dissipation materials (5) are respectively provided between the symmetrically arranged first elastic components (1a) and between the symmetrically arranged second elastic components (1b). This invention has low lateral stiffness, high axial stiffness, and large damping characteristics. By reasonably arranging and installing it between the support and the momentum wheel, it can effectively meet the vibration isolation requirements of the momentum wheel; this invention has advantages such as simple and compact structure, convenient processing and assembly, high design freedom, stable and reliable performance, light weight, and low cost.

The application discloses a primary suspension system and a railway vehicle, which comprises a framework, an axle box body arranged on the inner side of a side beam of the framework, a rubber node assembly connected between the top of the axle box body and the framework, used for providing longitudinal and transverse positioning stiffness and releasing vertical stiffness, two steel spring assemblies connected between the top of the axle box body and the framework, and the two steel spring assemblies are respectively arranged on the two sides of the rubber node assembly along the longitudinal direction, used for providing vertical stiffness, and a positioning pull rod connected between the bottom of the axle box body and the framework, used for providing longitudinal stiffness and releasing vertical stiffness and transverse stiffness. The vertical stiffness, the transverse stiffness and the longitudinal stiffness are decoupled, the stiffness in the vertical direction, the longitudinal direction and the transverse direction is respectively realized independently, the primary suspension system has sufficient wheelset axle box positioning stiffness and small vertical stiffness, the critical speed and the ride comfort of the vehicle are ensured, and the high-speed stability and the smoothness requirement of the vehicle are met.

The invention relates to a splicing structure of adjacent new and old main beam diaphragm plates for widening a bridge and a splicing method thereof, in particular to the technical field of bridge construction. The steel-UHPC combined diaphragm plate comprises the early-formed steel-UHPC combined diaphragm plate and the middle later-stage UHPC poured into the early-formed steel-UHPC combined diaphragm plate, the high tensile capacity of the steel plates and the steel bars and the ultrahigh strength of the UHPC are fully played, and adjacent new and old main beams of an existing bridge and an extended new bridge are temporarily spliced into a whole through the diaphragm plate; the requirements for transverse tension and vertical shearing of the spliced transverse partition plate are met, meanwhile, weak vertical rigidity and transverse rigidity are temporarily formed, and large transverse bridge deformation and vertical warping generated by concrete shrinkage creep difference after splicing are coordinated; the structure is simple, the design is reasonable, construction is convenient, the splicing time is shortened, the method can be widely applied to splicing of adjacent new and old main beam diaphragm plates of an existing bridge and an extended new bridge in a broadening and extension project, and the construction efficiency is improved.

The invention discloses a method for analyzing an integral swing structure with asymmetrical rigidity around a strong axis and a weak axis of the structure. The method comprises the following steps: S1, designing an upper structure; s2, calculating the shear force of the base; s3, the shear bearing capacity of the vertical tension-compression energy dissipation limiting support is designed; s4, establishing a mechanical analysis model, and solving a force balance equation; s5, a rigid body displacement proportion u3 / u is preset, and the basic rotation rigidity KSy of the upper structure around the weak axis side is solved; s6, calculating the rigidity of the vertical bearing damping body according to the axial force of the bottom of the upper structure under the action of the gravity load; s7, the basic rotation rigidity Ksx of the upper structure around the strong axis side is calculated; s8, the basic rotation rigidity Ksx of the side, around the strong axis, of the upper structure is substituted into the force balance equation, the lateral stiffness of the side, around the strong axis, of the upper structure is calculated, and the section size of a beam or a column is adjusted; s9, a vertical tension and compression energy consumption limiting support is designed; s10, estimating a damping ratio, and carrying out earthquake time history response analysis; and checking whether a corresponding limit value and a performance target of the specification are met.

The present application belongs to the field of aero-engine rear casing design, and is a variable-wall-thickness turbine rear load-bearing frame structure. In order to improve the structural bearing capacity, meet the strength requirements and reduce the weight as much as possible, the outer ring adopts a circumferential variable-wall-thickness design. The circumference of the first arc plate 5 should be greater than 180° to simultaneously increase the radial and lateral stiffness of the rear casing; the transition zone is generally designed to be between two support plates. Under the same load conditions, the more support plates there are, the smaller the circumferential arc length range of the AD arc segment; the wall thickness of the AD arc segment is generally not greater than 2.5 times the wall thickness of the BC arc segment; the setting of the AB and CD segments buffers the stress of the first arc plate and the second arc plate to prevent sudden stress changes from affecting the stiffness of the outer ring 1; the reduction in the thickness of the second arc plate reduces the structural weight while optimizing the force transmission path structure and improving the structural bearing capacity and radial stiffness.

This application proposes a method for the online identification of wheel lateral stiffness. The method comprises the following steps: Step S1: creation of a lateral kinematic model of the vehicle with respect to the parameters to be identified, taking into account the lateral stiffness of the front and rear wheels of the vehicle; Step S2: discretization of the lateral kinematic model of the vehicle to obtain a discrete model with respect to the parameters to be identified; and Step S3: fitting the output of the discrete model using a water circulation algorithm to determine the parameters to be identified online. This application also proposes a device for the online identification of wheel lateral stiffness and a computer program product. This application uses a heuristic algorithm to identify the wheel lateral stiffness online.This takes into account the temporal variability of the wheel lateral stiffness, which significantly improves vehicle stability control.

The application discloses a kind of buckling-restrained brace reinforcing method of existing plate column structure, comprising: step one: selecting the intermediate position of transverse side column and the intermediate position of longitudinal side column in the plate column structure system to be reinforced to set buckling-restrained brace;Step two: when the square column structure and the cylindrical structure determined in step one are calculated and determined, reinforcing the lower part of circular column is set to close steel plate with perimeter embedded part, which can be used as concrete pouring formwork;Step three: when the frame beam determined in step one is calculated and determined, newly added frame beam upper part is placed on the iron reinforcement;Step four: the buckling-restrained brace node plate is welded on the embedded part;The application is used for resisting lateral horizontal force by setting buckling-restrained brace, and the existing column at the place where buckling-restrained brace is set is reinforced by increasing section method, which can meet the setting of buckling-restrained brace embedded part, increase the lateral stiffness of the whole structure, improve the seismic capacity of the structure, and effectively prevent the instability damage of the original structure column.

The utility model discloses a screw rod cast-in-place pile body reinforcing structure assembly, and relates to the technical field of screw rod cast-in-place piles, the screw rod cast-in-place pile body reinforcing structure assembly comprises two reinforcing frames, a connecting frame is arranged between the two reinforcing frames, each reinforcing frame comprises a plurality of stiffening hoops, the stiffening hoops are vertically arranged, the stiffening hoops are fixedly connected with a plurality of main reinforcements, and the main reinforcements are fixedly connected with the connecting frame. The multiple main reinforcements are arranged along the inner circle edge of the stiffening hoop, a stable structure is arranged on the multiple main reinforcements, and the stable structure comprises spiral stirrups and triangular reinforcements; the spiral stirrups are tightly wound on the outer sides of the main reinforcements to form a continuous spiral structure, and when the spiral stirrups are subjected to shear force, the spiral stirrups can effectively resist shear damage, so that the overall shear resistance of the reinforcement frame is improved; the triangular ribs are arranged in a triangular shape and connected between the main ribs of the reinforcing frame to form a stable supporting structure, and the transverse rigidity of the reinforcing frame is improved due to the triangular ribs, so that the reinforcing frame can better bear lateral pressure or bending moment.

The utility model discloses a weak lateral stiffness vehicle-bridge coupling vibration damping device which comprises a plurality of vibration damping mechanisms arranged between two track beams, a plurality of steel cross beams are arranged between every two adjacent vibration damping mechanisms, each vibration damping mechanism comprises a support, a hydraulic damper, a spring and a positioning pipe, the positioning pipes are fixed on the track beams, and the hydraulic dampers are arranged on the support. The support is connected with the positioning pipe in a sliding mode, the two ends of the hydraulic damper located in the positioning pipe are connected with the support and the track beam respectively, and the hydraulic damper is sleeved with a spring. Compared with the prior art, on the basis of the design of the emergency channel, the damping mechanism serves as a part of the emergency channel, the damping effect is achieved while the requirement of the emergency channel is met, meanwhile, the damping mechanism plays a strong connection role for the track beams on the two sides, the safety of the structure is guaranteed, and the running safety and comfort of a vehicle are improved. Compared with a traditional emergency channel design, laying of steel longitudinal beams is omitted, and the material consumption is reduced.

The utility model discloses a steel rib truss structure which comprises a steel rib truss and a stand column. The steel rib truss comprises an upper chord member, a lower chord member and a web member; the upper chord member is a steel-reinforced concrete member; the lower chord is a steel pipe or profile steel; the web members are profile steel or steel pipes; the web members comprise straight web members and / or diagonal web members; the upper chord comprises an upper chord steel rib and upper chord concrete; the upper chord steel rib comprises a web plate and a flange; the upper chord steel rib consists of profile steel or a steel plate; the upper chord steel rib is H-shaped or groove-shaped; the web is wrapped by upper chord concrete; the upper chord concrete is filled between the flanges; the steel rib truss is connected with the stand column. The stand columns are arranged at intervals. The utility model has the advantages of large lateral stiffness, small deformation and good durability.

The invention belongs to the technical field of anti-seismic reinforcement of building structures, and discloses a method for calculating lateral stiffness of an externally-attached energy dissipation frame reinforcement system based on a virtual work principle. The problem that in the prior art, a quick and reliable theoretical calculation method for quantizing contribution of the bending type damper to the lateral stiffness of the attached frame column is lacked is effectively solved. The method aims at a frame reinforcing system composed of an existing frame, an externally-attached frame and a bent metal damper connected to a beam-column joint of the externally-attached frame. The method comprises the following steps that (1) a damper rotating rigidity model is established and solved; (2) establishing an equivalent linear stiffness model of the reinforced combination column and solving the equivalent linear stiffness model; and (3) establishing and solving an overall frame lateral stiffness resistance model. The closed analysis method is clear in physical concept and simple in calculation, parameter design and structural scheme optimization of the damper can be efficiently guided, and the design efficiency is remarkably improved.