22results about How to "Increased shear capacity" patented technology

The utility model discloses a steel box girder fine positioning node which comprises a first positioning piece arranged on the right side of the top face of a lower bottom plate of a first steel box girder in the width direction of the steel box girder, a plurality of second positioning pieces parallel to the first positioning piece are arranged on the right side of the first positioning piece, and the second positioning pieces are provided with guide grooves perpendicular to the lower bottom plate of the first steel box girder. The third positioning piece extends in the length direction of the steel box girder and is arranged on the left side of the top face of a lower bottom plate of the second steel box girder, an inverted-Y-shaped bayonet with the depth matched with the height of the first positioning piece is formed in the lower portion of the third positioning piece, and the distance between the inverted-Y-shaped bayonet and the left end face of the second steel box girder is matched with the distance between the first positioning piece and the right end face of the first steel box girder; the height of the first positioning piece is smaller than that of the third positioning piece, and the height of the third positioning piece is smaller than or equal to that of the second positioning piece. According to the utility model, the steel box girder can be accurately positioned, and the assembly efficiency of the steel box girder bridge is improved.

The invention belongs to the technical field of building structural member connection, and discloses a square steel tube confined concrete column-RC beam connection joint which comprises a connection joint body used for connecting a steel tube confined concrete column and a reinforced concrete beam. The connecting joint comprises a joint area steel pipe, and the reinforced concrete beam penetrates through the joint area steel pipe and is fixedly connected with the joint area steel pipe. The steel pipe confined concrete column comprises an upper column and a lower column; a connecting assembly is arranged in the reinforced concrete beam, penetrates through the joint area steel pipe and is fixedly connected with the joint area steel pipe. The node area steel pipe is filled with concrete. The method is convenient and fast to construct, reliable in joint performance, high in material utilization rate, small in steel consumption and excellent in anti-seismic performance, local buckling of the square steel pipe can be effectively delayed, the integrity of concrete is higher, the restraining effect on core concrete is enhanced, economic benefits are improved, and the problems that in the prior art, construction is difficult, and joints are complex are solved.

This invention provides a beam structure with UHPC filling in the shear bending section and its prefabrication method, solving the problems of current beam construction methods that use only UHPC, which not only result in a large structural self-weight and high cost, but also increase the overall construction cost and extend the construction period. This invention includes ordinary concrete beam sections and UHPC beam sections, which are spaced apart along the length of the beam. Taking into account the stress characteristics of the shear bending section of reinforced concrete beams, this invention fills a certain length of UHPC material only in key areas of the reinforced concrete shear bending section to improve the mechanical properties of the main beam's shear bending section, significantly increasing the shear bearing capacity of the main beam. Simultaneously, filling a portion of the main beam's shear bending section with UHPC effectively reduces the cross-sectional area of ​​the beam near the supports, reducing the structure's self-weight and lowering the construction cost of the UHPC, thus exhibiting good economic efficiency and practicality.

The application discloses a high-pile wharf lower cross beam structure and a construction method thereof. The lower cross beam structure comprises: a plurality of groups of combined inclined piles which are arranged at intervals along the length direction of the lower cross beam; each group of combined inclined piles comprises at least two inclined piles; the upper end of each inclined pile is provided with a combined pile clamping structure, and the combined pile clamping structures on the adjacent two inclined piles in the same group of combined inclined piles are fixedly connected; the lower cross beam body is a reinforced concrete structure with a built-in steel reinforcement cage; the steel reinforcement cage comprises main reinforcement, transverse reinforcement, stirrups and a bottom I-beam; the upper end of each inclined pile extends into the lower cross beam body; the bottom I-beam is arranged between the adjacent two groups of combined inclined piles, and the two ends are fixedly connected with the combined pile clamping structures on the inclined piles on the two sides; each main reinforcement is arranged along the length direction of the lower cross beam; each stirrup is arranged on the main reinforcement at intervals; and the transverse reinforcement is arranged in three layers along the width direction of the lower cross beam. The application can integrate the pile clamping function and the stress of the lower cross beam structure, reduce the cost and improve the construction efficiency.

The utility model relates to a double-steel-plate concrete composite wall with built-in I-shaped steel for connection. The double-steel-plate concrete composite wall comprises a plurality of I-shaped steel, a steel plate, a plurality of bent and twisted steel bars, a transverse steel plate and a plurality of longitudinal I-shaped steel, a plurality of positioning holes are formed in each piece of I-shaped steel at equal intervals, the plurality of pieces of I-shaped steel are arrayed to form a cube shape, then one piece of longitudinal I-shaped steel is inserted into the plurality of positioning holes in the same vertical position in a penetrating manner, and a plurality of bent and twisted steel bars are mounted among the plurality of pieces of I-shaped steel on each layer to fix the cube shape; and transverse steel plates are welded and connected at the upper ends of the plurality of I-shaped steel on each layer for fixing. The bent and twisted steel bar is in an X shape with four end portions, an upper hook is arranged at the end portion of the upper end, and a lower hook is arranged at the end portion of the lower end. The X-shaped structure of the bent and twisted steel bars realizes three-dimensional space constraint, so that the shear bearing capacity of the composite wall is improved; the positioning holes and the steel plates are matched in an inserted mode to ensure effective transmission of vertical loads; and the construction efficiency is improved through the modular assembly technology.

The utility model relates to a reinforcing structure for a lintel of a stair hole of an existing building. The reinforcing structure comprises pressing strips arranged on the two opposite sides of the lintel and attached to the bottom of a floor slab of the building. The U-shaped hoops are arranged on the lintel in a hooped mode, and the two ends of each U-shaped hoop are arranged between the pressing strip and the lintel; the two pressing strips are arranged on the lintel, the screw penetrates through the two pressing strips and the lintel, the two ends of the screw are in threaded connection with fixing nuts, the two pressing strips are fastened by screwing the fixing nuts, the structure is simple, and construction is convenient.

The utility model discloses a prestressed concrete structure hole reinforcing connecting device, which belongs to the field of concrete structure design and construction, and comprises a concrete beam, and a hole is arranged in the concrete beam. Meanwhile, the connecting prestressed steel strands are arranged at the circular hole, the hole is surrounded by the connecting prestressed steel strands, the effect of enhancing the shear bearing capacity of the net section of the beam at the hole can be achieved, and meanwhile the connecting prestressed steel strands comprise the horizontal prestressed steel strands and the hole prestressed steel strands; the reinforcing ribs on the periphery of the hole are extruded through the arc-shaped hole prestress steel strands, the effect of supporting multiple side ends of the hole can be well achieved, the supporting force of the hole is enhanced, the hole is more stable, the effect of reinforcing connection of a concrete hole structure is achieved, and later construction is more convenient.

The invention relates to the technical field of building structure detection, and provides a steel pipe column and concrete beam joint bending resistance detection device and a well type double-beam structure.The steel pipe column is provided with a bending resistance assembly connected with a concrete beam, and the bending resistance assembly comprises an upper bending resistance bracket and a lower bending resistance bracket; the anti-bending detection device comprises a magnetic detection assembly arranged between the upper anti-bending bracket and the lower anti-bending bracket and a magnetic sensing assembly arranged in the steel pipe column in a matched mode, the magnetic detection assembly converts bending deformation of the anti-bending assembly relative to the steel pipe column into a magnetic detection signal, and the magnetic sensing assembly obtains the magnetic detection signal; and the bending state or the bending bearing capacity of the beam-column joint is obtained according to the magnetic detection signal. According to the device, the stress state of the steel pipe column and concrete beam joint can be monitored, and potential safety hazards of the beam column joint can be warned in advance; the bending state or bending bearing capacity of the well-type double-beam structure is detected through the bending resistance detection device, the well-type double-beam structure has the functions of high bending resistance and bending state detection, and safe use of a building structure is ensured.

The utility model discloses a floor post-pouring band structure, including base bottom plate, the post-pouring band is arranged between the adjacent base bottom plate, and the one side of base bottom plate towards post-pouring band is provided with first tenon, and the post-pouring band is provided with first mortise corresponding first tenon, and the upper part horizontal interval of post-pouring band is provided with a plurality of face reinforcement, and the lower part of post-pouring band is provided with bottom reinforcement correspondingly, and the vertical reinforcement is connected between face reinforcement and the bottom reinforcement corresponding below it, and the post-pouring band is arranged with flat steel, and the middle part of flat steel is downward bent and forms bending lower part, and the bending lower part is provided with a plurality of formwork holes for containing face reinforcement, and the upper part of flat steel is parallel to post-pouring band top surface, and face reinforcement, bottom reinforcement are connected with the inboard reinforcement arranged in base bottom plate respectively, and flat steel cooperates face reinforcement, vertical reinforcement and bottom reinforcement and forms rigid connection frame, guarantees that steel framework whole is stable, and flat steel helps more evenly transfer longitudinal stress, and reduces the risk of structure cracking in later period.

The utility model discloses a prefabricated assembled bridge pier grouting joint structure which comprises a bearing platform and a prefabricated pier column section, reserved through holes which are longitudinally communicated are formed in the bearing platform and the prefabricated pier column section, reinforcement cages are arranged in the reserved through holes, a prefabricated groove hole matched with the prefabricated pier column section is formed in the top end of the bearing platform, and the prefabricated groove hole is communicated with the prefabricated pier column section. Positioning connection structures which are embedded with each other are prefabricated at the joints of every two adjacent prefabricated pier column sections; the positioning conical grooves in the two ends of the prefabricated pier column section and the conical surface of the pressing connecting conical head are designed in a self-locking mode, the pressing connecting conical head is arranged to be a rectangular pyramid, instant guiding and positioning of hoisting of the prefabricated pier column section are achieved, the time consumed for adjusting the reserved through hole is shortened, the pressing connecting conical head is pressed to generate radial separation, and the positioning accuracy of the prefabricated pier column section is improved. The shear bearing capacity of the joint is improved; the connecting spiral convex ribs are arranged on the inner wall of the reserved through hole to form a continuous thread-shaped interface, so that the mechanical meshing force between the grouting material and the hole wall is improved, and the interface is prevented from sliding.

The invention discloses a precast concrete segment, a concrete ring, a concrete cylinder and a manufacturing and construction method, the precast concrete segment comprises precast concrete, reinforcing steel bars and steel ribs, the reinforcing steel bars comprise circumferential reinforcing steel bars and longitudinal reinforcing steel bars, the circumferential reinforcing steel bars and the longitudinal reinforcing steel bars form reinforcing steel bar meshes, and the steel ribs are located between the reinforcing steel bar meshes and extend out of the surface of the precast concrete; the steel ribs are continuous or separated, and the annular steel bars of the duct pieces extend out of the surface of the precast concrete. The method has the advantages that the rigidity and fatigue resistance of the concrete ring are improved, and the bearing capacity and rigidity of the tower drum are improved.

The utility model provides a structure for improving the section grade of a composite beam. The structure comprises a steel beam, reinforcing angle steel and a concrete floor. The concrete floor slab and the steel beam are connected through a connecting piece; the steel beam is provided with a neutralizing shaft, the part above the neutralizing shaft forms a compression area, the compression area comprises a T-shaped compression area of the steel beam and a concrete floor, reinforcing angle steel is installed on the outer side of the steel beam and located in the T-shaped compression area of the steel beam, and two limb plates of the reinforcing angle steel are tightly attached to a web and an upper flange of the steel beam respectively. The reinforcing angle steel is symmetrically arranged on two sides of a web of the steel beam. The reinforcing angle steel is arranged in the compression area of the web of the steel beam, so that the width-to-thickness ratio of the web in the compression area is reduced, the web of the composite beam meets the S1 section grade, and meanwhile, the bending resistance and the shearing resistance of the composite beam are improved. The combined beam is simple in structure and beneficial to popularization of the combined beam in a steel structure reinforcing project.

The utility model provides a connecting structure for a concrete-filled steel tube frame column and a concrete shear wall, which comprises a connecting node formed by connecting the concrete-filled steel tube frame column and the concrete shear wall, and the connecting node comprises a first shear key and a second shear key which are arranged in parallel, one end of the first shear key and one end of the second shear key are both connected with the concrete filled steel tube frame column, and the other end of the first shear key and the other end of the second shear key both extend into the concrete shear wall. According to the connecting joint for the concrete-filled steel tube frame column and the concrete shear wall, the first shear key and the second shear key are combined and extend into the concrete shear wall, the first shear key and the second shear key are anchored with the concrete shear wall, and therefore higher connecting strength is obtained; reliable connection between the concrete-filled steel tube frame columns and the concrete shear wall is guaranteed, and the bearing capacity and the anti-seismic property of the structure are guaranteed.

The utility model discloses a kind of lateral displacement resistant reinforcing structures suitable for masonry structure, it is related to the field of masonry reinforcing appliance, including reinforcing frame, for reinforcing use to adhere masonry building, further include: traction mechanism, for reinforcing frame is traction fixed;Reinforcing mechanism, for the compression, shearing capacity of auxiliary reinforcing frame;By the reinforcing steel cable of reinforcing frame end, reinforcing frame and transverse masonry structure are traction fixed, to prevent masonry structure from continuing to occur transverse displacement, to improve the firmness of masonry building, and reinforcing frame is fixedly connected with several reinforcing cloths by clamping plate and friction plate clamping on reinforcing frame, so that several reinforcing cloths can be reinforced by auxiliary reinforcing frame to masonry building, to improve the compression, shearing capacity of reinforcing frame, finally reinforcing frame is fixedly installed on masonry structure by several fixed slots cooperation bolt, to reach the purpose of reinforcing masonry building.

The application relates to a self-sensing connecting piece with embedded intelligent aggregate and a connecting system, the connecting piece comprising a steel pipe (1), high-strength concrete (2) and piezoelectric intelligent aggregate (3); the high-strength concrete (2) is arranged in the steel pipe (1), and the piezoelectric intelligent aggregate (3) is arranged in the high-strength concrete (2); the connecting system comprises the self-sensing connecting piece with embedded intelligent aggregate, further comprises a first component and a second component, and the self-sensing connecting piece with embedded intelligent aggregate is arranged in the first component and connected with the second component. Compared with the prior art, the application provides the connecting piece with sufficient tensile bearing capacity and shearing bearing capacity, which can self-sense damage, and long-term and accurate monitoring of the performance of the connecting piece can be achieved.

The invention relates to a super-high-rise core tube super-dense diagonal diagonal reinforcement and stiff steel rib conflict preparation construction method. The method comprises the following steps of software working condition simulation analysis, determination of floors with diagonal diagonal reinforcement connecting beams and distribution positions, building of a three-dimensional model, space avoidance analysis and analysis of a diagonal diagonal reinforcement arrangement model. Determining a replacement scheme and a coupling beam range, replacing conflicting diagonal inclined ribs by adopting diagonal steel plates in an equal area manner, and reserving a small number of diagonal inclined ribs which are only arranged outside the range of the stiff steel ribs on the two sides of the coupling beam; diagonal steel plates are designed and prefabricated; diagonal steel plates are welded to the stiff steel ribs on site; connecting the main reinforcements of the coupling beam and intensively penetrating the stirrups; arranging the rest diagonal inclined ribs, and symmetrically penetrating the diagonal inclined ribs outside the range of the stiff steel ribs; binding horizontal ribs and tie bars on the side surfaces of the coupling beams; and a formwork is erected, and concrete is poured. Diagonal steel plates and stiff steel rib flanges at the two ends are welded into a whole in a full penetration mode, only a small number of diagonal inclined ribs are reserved on the two sides of the stiff steel ribs, and the purpose that super-dense diagonal inclined ribs and the stiff steel ribs are prepared in a conflict mode is achieved.

In order to solve the problem that the anti-seismic reinforcing effect of the existing RC frame inner node is poor, the utility model provides a reinforcing structure for reinforcing the concrete frame inner node, which is characterized by comprising a reinforcing structure body arranged at the position of the reinforced concrete structure inner node in a reinforcing manner, the reinforcing structure body comprises CFRP-UHPC prefabricated slabs used for being tightly attached to the corners of the periphery of a beam column, the upper ends of the CFRP-UHPC prefabricated slabs are attached to a top plate installed on the beam column, the two side faces of the CFRP-UHPC prefabricated slabs are attached to peripheral beams installed on the beam column, and the lower ends of the CFRP-UHPC prefabricated slabs are anchored to the beam column through CFRP hoops. According to the full-prefabricated hollow filling wall based on the UHPC material, the reinforcing structure is reasonable in overall design, simple in structure and convenient to construct, and the CFRP-UHPC prefabricated slabs are pasted to the corners of the beam columns, so that the bending bearing capacity of the upper ends of the beam columns and the shear bearing capacity of nodes are effectively improved.

This utility model relates to the field of glued laminated timber (GLLT) technology and provides a GLLT curved beam splicing structure, including a first curved beam and a second curved beam. A fitting groove is provided on one side of the first curved beam, and several overflow holes are provided at the lower end of the first curved beam corresponding to the fitting groove. A boss is fixedly installed on one side of the second curved beam. The first and second curved beams are fitted together. The beneficial effects of this utility model are: through the stepped fitting structure of the fitting groove and the boss, mechanical interlocking is achieved, dispersing shear force to multiple interfaces. Compared with traditional through bolt connections, this significantly improves the shear bearing capacity and connection firmness of the splicing node. The combined constraint structure of the clamping plate and the sleeve plate forms a ring clamping force through bolt pre-tightening, effectively suppressing the shaking and displacement of the beam after splicing, making the load transfer more uniform, and significantly improving structural stability. This achieves reliable load transfer for GLLT curved beam splicing, meeting the structural stability requirements of large-span buildings.

The utility model relates to the technical field of composite beams, and particularly discloses a pre-tensioning method pre-stress continuous bending web member truss composite beam, which is characterized in that a web member of the composite beam is formed by continuously bending a steel pipe through a pipe bending machine, and cement slurry is injected into the web member; the lower chord member is composed of two grouting steel pipes with prestressed tendons penetrating through the grouting steel pipes. The upper chord and the reinforced concrete floor form a combined section through the double-limb angle steel. The prestressed bent pipe truss composite beam has the remarkable advantages of being high in bearing capacity and rigidity, simple in manufacturing process and the like, compared with a steel beam with the same bearing capacity and rigidity, the steel consumption is reduced by 40%, good economic benefits and social benefits are achieved, and the prestressed bent pipe truss composite beam is particularly suitable for public buildings and industrial buildings with medium and small spans (8-12 m) under the medium-load working condition.

The precast concrete pipe piece comprises precast concrete, reinforcing steel bars and steel ribs, the reinforcing steel bars comprise circumferential reinforcing steel bars and longitudinal reinforcing steel bars, the circumferential reinforcing steel bars and the longitudinal reinforcing steel bars form reinforcing steel bar nets, the steel ribs are located between the reinforcing steel bar nets, the steel ribs extend out of the surface of the precast concrete, and the steel ribs are continuous or separated. The annular steel bars of the pipe pieces extend out of the surface of the prefabricated concrete. The concrete ring has the advantages that the rigidity and fatigue resistance of the concrete ring are improved, and the bearing capacity and rigidity of the tower drum are improved.

This utility model relates to the field of building construction technology and discloses a fixing device for embedded parts in concrete pouring. It includes a top plate, with multiple legs fixedly connected to the bottom end of each top plate. Multiple fixing rings are rotatably connected to the outer sides of each of the legs, and multiple fixing mechanisms are installed on the outer sides of each fixing ring. Two reinforcing bars are installed inside each fixing mechanism. Each fixing mechanism includes a fixing block, with its outer side fixedly connected to the outer side of the fixing rings. A rotating rod is rotatably connected inside the fixing block, and a bevel gear is fixedly connected to the outer side of the rotating rod. In this utility model, the rotating rod drives the bevel gear set to rotate the semi-threaded rod, which in turn moves the moving rod and sliding rod. Through the connecting rod and slider, the clamping rods move towards each other to clamp the reinforcing bars. This device can evenly transmit external force to the reinforcing bar network, improving pull-out resistance, and is easy to install, thus accelerating construction.

The present invention proposes an all-steel assembled double-limb steel pipe-constrained anti-buckling steel plate shear wall, which belongs to the field of structural engineering technology. The embedded steel plate is welded in the edge frame through the upper fishplate, the lower fishplate, the left fishplate and the right fishplate, and the double-limb constrained steel pipes are symmetrically arranged at equal intervals on both sides of the embedded steel plate, and the embedded steel plate is clamped by the connecting bolts. The present invention improves the shear bearing capacity and hysteretic energy dissipation capacity of the steel plate shear wall. By adjusting the number of double-limb constrained steel pipes, the bearing capacity and stiffness of the shear wall can be conveniently adjusted, which is convenient for structural design. The constrained steel pipe is small in size and light in weight, which is convenient for transportation and hoisting.