43results about How to "Meet earthquake resistance requirements" patented technology

The invention provides a hybrid type rapid direct current breaker, comprising: a main flow branch, a current transferring branch and an energy consumption branch. All are connected in parallel. The main flow branch comprises a rapid mechanical switch unit and a main branch sub-module unit. The two units are in series connection. The current transferring branch comprises valve module units in successive cascade connection with each valve module unit comprising a plurality of semiconductor modules in series connection. The energy consumption branch comprises energy consumption components in successive cascade connection. According to the invention, the design of the breaker structure is such a design featuring the electrical topology corresponding to modularization. This means that for the application requirement of different voltage grades, the structure can be expanded to do so. As the breaker adopts a single platform supporting structure, all functional units can be integrated onto the platform, therefore, making the equipment highly integrated, small in size, and strongly resistant to earthquakes. Highly reliable and flexible in structure, better electric compatibility can be achieved. With the breaker, it is possible to rapidly cut off the current in fault when the direct current system meets a fault.

The invention discloses a 400 MPa stage reinforcing steel bar and a manufacturing method thereof. The carbon equivalent of the 400 MPa stage reinforcing steel bar is smaller than or equal to 0.52%, and the 400 MPa stage reinforcing steel bar comprises, by mass percent, 0.20 to 0.25% of C, 0.55 to 0.80% of Si, 1.30 to 1.60% of Mn, and 0.006 to 0.012% of N, and further comprises one or multiple of Nb, Ti and Al, and the balance Fe and inevitable impurities; the mass percent of Nb, Ti and Al ranges from 0.01 to 0.04. The 400 MPa stage reinforcing steel bar has the advantages that no obvious yieldpoint elongations exist in a stress-strain curve in the tensile test, the customer needs are met, the yield strength is larger than or equal to 420 MPa, the yield ratio is smaller than or equal to 0.80, the specific elongation is larger than or equal to 18%, and the uniform ductility is larger than or equal to 8%.

The invention provides an energy dissipation and seismic mitigation type self-resetting prefabricated segment assembled pier structure and a construction method thereof. The pier structure comprises abearing platform, a pier body, prefabricated sections, a bent cap and unbonded prestressed tendons, wherein the pier body is arranged on the bearing platform; the bent cap is arranged on the pier body; the bearing platform, the pier body and the bent cap are connected into a whole through the unbonded prestressed tendons; the pier body is formed by vertically stacking a plurality of prefabricatedsections; combined type steel pin rod (lead pin rod) shear keys are evenly arranged in the cross section of the joint between every two of the bearing platform, the prefabricated segment and the bentcap; the outer side of the joint area is connected through a low-carbon steel energy dissipation plate. The shear torsion resistance and the energy dissipation capacity of the pier are improved through the combined shear keys and the low-carbon steel energy dissipation plates, and meanwhile, the lateral stiffness of the pier at different heights is adjusted through the prestressed tendons which are dispersedly anchored in multiple sections, so that the anti-seismic requirements under the action of different levels of earthquakes are met.

The invention provides a rubber tube rolling shock insulation support for shock insulation of a building structure foundation. The rubber tube rolling shock insulation support comprises a limiting seat, a ball limiting rack, multiple balls, multiple rubber tubes, a concrete column-column foot lining plate and a limiting stay rope. An upper-portion structure can produce a certain amplitude of horizontal displacement with respect to the shock insulation support fixed to the foundation through matching of the limiting seat, the rubber tubes, the balls and the ball limiting rack when horizontal shock occurs, the power effect of shock on the upper-portion structure is reduced, deformation of a shock insulation layer during earthquake can be limited, the support has a certain reset capability, the limiting stay rope can ensure that the upper-portion structure and the foundation do not produce overlarge displacement, the shock resistance capability of the structure is improved, and the shock resistance demand is met.

The invention discloses an energy dissipation self-reset anti-seismic retaining block structure for a bridge. The structure comprises a cap beam and a beam body, seismic mitigation and absorption supports are arranged on the top surface of the cap beam, the beam body is supported on the seismic mitigation and absorption supports, and retaining blocks are arranged at two ends of the cap beam respectively. A flat end of a concave steel plate with a projection portion having a through hole in the width direction is fixedly embedded into each retaining block, a hinge dowel penetrates holes of each concave steel plate and a corresponding turnover steel plate to connect the two to form a movable hinge, a projection portion of each turnover steel plate is provided with the through hole, and a flat end of each turnover steel plate is provided with a slope. A steel plate with a suspension arm end identical to the corresponding turnover steel plate in slope angle is welded to a beam body embedded part, a plurality of springs are arranged at the end of each turnover steel plate, and each turnover steel plate and the cap beam are connected together through the springs. Under seismic action, seismic energy dissipation and self reset of the beam body can be realized by the movable hinges and the springs, beam falling accidents are reduced, and seismic performance of a bridge structure is improved.

The invention relates to a prestressed assembled board column structure with steel supports. The prestressed assembled board column structure consists of prefabricated columns (1) with built-in fittings (3), prefabricated boards (2) and steel supports (5), wherein the prefabricated boards are rib-dense prefabricated boards with ribs in dual directions; the built-in fittings and the prefabricated columns are molded integrally by pouring; the prefabricated columns are connected together with the prefabricated boards via prestress and friction force produced by prestressed ribs; and the steel supports are connected with the built-in fittings through high-strength bolts. Each built-in fitting consists of two pieces of single-angle steel (6), a node plate (7) and four bolts (9) with bent hooks; each node plate is spliced between the first sides of every two pieces of single-angle steel (6); and the bolts extend out of the second sides of the single-angle steel and are anchored in the prefabricated columns respectively. The prestressed assembled board column structure disclosed by the invention is convenient to install, is low in cost, is high in seismic resistance, and is suitable for the technical field of seismic resistance in building structures.

The invention provides a bridge aseismic design method based on a response surface model, it can fully consider different bridge types and corresponding design parameters as well as ground motion intensity, by establishing the response surface model of bridge seismic failure probability, the adjustment range of each parameter of the bridge is obtained,when performance requirements are not met, facilitating the determination of the direction and scope of the adjustment, the tuning process is more intuitive through the model, thus, the optimum value of each design parameter of the bridge can beobtained quickly and conveniently, the design capacity of the bridge can be optimized, the safety coefficient of the bridge can be improved, the service life can be prolonged, the practicability is strong, the calculation process is simple, the design time cost is greatly reduced, the design efficiency can be improved under the condition of meeting the seismic demand of the bridge, and the bridgehas excellent application prospect.

The invention relates to a self-resetting member based on parallel high-strength steel ring springs. The resetting member comprises an outer cylinder piece with the inner wall provided with a first annular groove, a ring spring mechanism provided with multiple ring spring sets in parallel and arranged in the annular groove, and an inner rod with the bottom end slidably extending into the outer cylinder piece and penetrating through the ring spring mechanism, the inner rod is further provided with a second annular groove, and the inner side portions of the upper and lower ends of the ring spring mechanism are separately placed in the second annular groove and correspondingly abut against the upper and lower ends of the second annular groove respectively. Compared with the prior art, energydissipation is achieved through friction between the contact surfaces of the high-strength steel ring springs, and the member has the self-resetting function. By adjusting the wedge rate, size and number of the high-strength steel ring springs, the processing mode of the contact surfaces and pretightening force of the high-strength steel ring springs, the anti-seismic requirement of multiple aspects can be met.

The invention discloses a bridge anti-seismic stop block structure capable of achieving buffering, energy dissipation and collision resistance. The bridge anti-seismic stop block structure comprises a cover beam, a beam body and a plurality of fishhook-shaped steel bars. Friction pendulum supports are arranged on the top face of the cover beam. The beam body is supported on the friction pendulum supports. The two ends of the cover beam extend upwards to form stop blocks correspondingly. One segments of the fishhook-shaped steel bars are fixedly embedded in the stop blocks. A layer of rubber is wrapped outside the exposed segment of each fishhook-shaped steel bar. In the strong earthquake process, according to the bridge anti-seismic stop block structure, through bending deformation of the multiple fishhook-shaped steel bars and the out-wrapped rubber layers, the impact function, on the bridge anti-seismic stop blocks, generated when transverse bridge direction displacement of the beam body is too large can be buffered effectively, earthquake energy is dissipated, transverse bridge direction beam falling accidents are reduced, and the anti-seismic performance of a whole bridge structure is improved.

The invention discloses a fabricated building support with an anti-seismic function. The fabricated building support comprises a longitudinal relief device and a plurality of transverse relief devices, the longitudinal relief device mainly reduces force generated by the longitudinal amplitude through an anti-seismic ball hinge, and the longitudinal seismic force is dispersed; and the transverse relief devices are arranged around the longitudinal relief device in the circumferential direction in an equal division mode. An air shock absorption device is arranged, and thus transverse seismic force is evenly absorbed by the air shock absorption device; and the support is arranged on the lower part of a ground cross beam, thus the number of supports can be adjusted according to the actual needs, and then seismic transverse and longitudinal force is effectively dissipated and mitigated.

The invention relates to the technical field of building structure engineering, in particular to a longitudinal joint impaction device and a longitudinal joint impaction resetting method.The longitudinal joint impaction device comprises a first impaction plate, a second impaction plate and a third impaction plate, the second impaction plate is arranged opposite to the first impaction plate; the stranded wire is wound on a stranded wire connecting seat, the first end of the stranded wire is connected with a stranded wire end seat, the stranded wire end seat is fixedly connected with the second impaction plate, and the second end of the stranded wire extends out of the space between the second impaction plate and the first impaction plate and is connected with a stranded wire take-up and pay-off device; the stranded wire take-up and pay-off device can tighten and release the stranded wire; the elastic structures are arranged between the first impaction plate and the second impaction plate, the first ends of the elastic structures are fixedly connected with the first impaction plate, and the second ends of the elastic structures are fixedly connected with the second impaction plate.

The invention relates to a novel energy dissipation and shock absorption inter-tower connection structure of a framing tower-connected cable-stayed bridge. The structure comprises bridge tower bearing platforms, bridge tower columns are fixed to the bridge tower bearing platforms, the bridge tower columns are divided into upper tower columns and lower tower columns through bridge tower cross beams arranged on the bridge tower columns, and the bottom ends of two bridge towers are connected through a combined structure bearing platform straining beam between the bridge tower bearing platforms; inter-tower steel box inclined struts are arranged between tower limbs of the lower tower columns, so that the two bridge towers form local connection; and steel corbels are installed on the tower columns at the positions of the bridge tower cross beams, and dampers are installed between the two bridge towers through the steel corbels. According to the framing tower connecting structure form provided by the invention, on the basis of not influencing the construction period of the bridge tower and not increasing the construction difficulty, the transverse bridge direction earthquake response of the bridge tower is greatly reduced, and the anti-seismic property, the safety and the economical efficiency of the bridge tower are greatly improved.

The invention discloses a low-frequency damping nine-sub-circular-pile earthquake meta-structure which is formed by extending earthquake meta-structure unit cells in two perpendicular directions in the horizontal plane and is designed on the periphery of a building foundation. Each earthquake meta-structure unit cell comprises a first steel pile, a second steel pile, a first hollow concrete pile, a second hollow concrete pile and a soil layer. The sections of the first steel pile and the second steel pile are circular. The sections of the first hollow concrete pile and the second hollow concrete pile are circular rings. The cross section of the soil layer is square, and nine circular through holes are distributed in the soil layer. The four small circular through holes are respectively positioned at four opposite corners of the square, and the distances between the small circular through holes and the center of the large circular through hole are equal. The distances between the centers of the small circular through holes are equal. The low-frequency damping nine-sub-round-pile earthquake meta-structure can attenuate earthquake surface waves in an omnibearing and multi-angle mode, protect a building, be simple in material obtaining and convenient to arrange, effectively reduce earthquake disasters and reduce post-disaster repair and maintenance cost of the building.

The application relates to the technical field of building structures, in particular to a fabricated shear wall assembly and a manufacturing method thereof. The fabricated shear wall assembly comprises a connecting joint bar, connecting plates and a plurality of shear walls, and each shear wall comprises a wall body, stiffeners and connecting sleeves; a part of the stiffeners are buried in the wall bodies, and a part of the stiffeners are arranged at one ends of the shear walls in the length direction of the stiffeners, and exposed out of the wall bodies; the connecting sleeves are connected with the stiffeners, and the connecting sleeves are provided with annular connecting parts exposed out of the wall bodies; the annular connecting parts are located at one end in the length direction; among the multiple shear walls, the annular connecting parts of the two adjacent shear walls arranged in the length direction are internally provided with the connecting joint bar in a penetrating mode; and the connecting plates are connected with the exposed parts in the stiffeners of the two shear walls fixedly, so that the two shear walls are connected. The fabricated shear wall assembly provided by the application is better in anti-seismic effect.

The invention relates to the technical field of pipeline engineering safety evaluation, and concretely relates to a bearing capacity evaluation method for a sandy soil box. The method is characterized by comprising the following steps: determining the position of a ground fracture through geotechnical engineering investigation data, and determining geological parameters above the ground fracture; collecting the size of a sandy soil box which is buried in a ground fracture position and used for protecting the buried pipe; and according to the geological parameters determined in the following steps and the size of the sand box, obtaining the corrected foundation bottom surface bearing capacity fa of the sand box according to the following formula. The evaluation and calculation method is simple, the operation is less, the evaluation result is accurate, and an evaluation basis is provided for quakeproof popularization of the sandy soil box.

The invention discloses an anti-overturning type bridge limiting stop block device which comprises an upper stop block, a lower stop block and extensible tensile steel bars, the upper stop block and the lower stop block are connected with a cast-in-place box girder and a lower pier respectively, and a gap is reserved between the upper stop block and the lower stop block; the upper ends and the lower ends of the extensible tensile steel bars are pre-buried in the upper check block and the lower check block correspondingly and connected with pre-buried steel bars of the cast-in-place box girderand pre-buried steel bars of the pier correspondingly. The anti-overturning type bridge limiting stop block device is ingenious in conception, simple, clear in stress and rapid and convenient to construct, plays a role in longitudinal and transverse earthquake resistance of a bridge, can realize anti-pulling and anti-overturning effects when the bridge overturns, and can also provide a space required by support replacement when the bridge support is replaced.

The invention discloses an anti-seismic structure for building design, which comprises a building model, a base and an earthquake simulation device, wherein a longitudinal damping structure is mounted at the bottom in the base, transverse damping structures are mounted on two sides of the inner wall of the base, the lower end of the building model is arranged in the base and fixedly connected with the transverse damping structures and the longitudinal damping structure respectively, and the earthquake simulation device is embedded in the bottom of the base; and the transverse damping structure comprises a first connecting plate, a third connecting plate, connecting columns and two connectors, the first connecting plate is movably connected with the third connecting plate, the outer wall of the first connecting plate is fixedly connected with the inner wall of the base, and the two connectors are symmetrically distributed. The transverse damping structures and the longitudinal damping structure are arranged in the base, the influence of vibration on the model in the transportation process is reduced, the transverse damping structures can achieve a good damping effect on vibration transverse waves during anti-seismic detection, the anti-seismic requirement of the model can be met through matched use of the transverse damping structures and the longitudinal damping structure, and the service life of the model is prolonged.

The invention discloses a rolling lifting type bridge anti-seismic check block device which is characterized in that a main beam is erected on a bent cap through a swing type support, welding steel boxes are arranged at the two ends of the bent cap, and the sides, facing the main beam, of the welding steel boxes are steps with arc-shaped transition sections; a vertical short steel plate is pre-buried in the corresponding side wall of the main beam; thick-wall steel pipes horizontally extending to the steps are fixed on the vertical short steel plates; a spring and a steel bar are arranged in the thick-wall steel pipe, one end of the spring is fixed to the vertical short steel plate, the other end of the spring is fixed to the inner end of the steel bar, the outer end of the steel bar extends out of the thick-wall steel pipe and is provided with a roller with a rotating shaft perpendicular to the steel bar, and the roller abuts against the step face of the lowermost step of the weldingsteel box. Under the action of earthquakes, earthquake energy is dissipated by fully relying on friction between component materials and lifting the main beam to overcome gravity to do the work, multiple defense and earthquake resisting effects can be effectively achieved, and the earthquake resistance of the bridge structure is remarkably improved.

The invention relates to the technical field of fabricated concrete structures in the construction industry, in particular to a fully fabricated reinforced concrete wall panel vertical bending-resistance beam joint structure through bolt connection. The fully fabricated reinforced concrete wall panel vertical bending-resistance beam joint structure through bolt connection comprises beam end connection parts, beam end anchoring parts and connection assemblies, the beam end connection parts are of a vertical bending-resistance structure and are consistent with the beam cross-section shape anchored by a concrete part; the beam end connection parts are fixedly connected with the front ends of the beam end anchoring parts through welding, and the beam end connection parts and the beam end anchoring parts form an integrated beam end connection structure; the two opposite beam end connection parts of the beam end connection structure are connected as a whole through the connection assemblies.The technical scheme of the fully fabricated reinforced concrete wall panel vertical bending-resistance beam joint structure through bolt connection solves the problems in the prior art a structure can not be reused, the bearing capacity is small, the structure is only suitable for a structure supported by the wall panel, the safety of the large span and complex structure cannot be ensured, the construction accuracy of the joint connection cannot be guaranteed, and the safety is reduced.