46results about How to "Improves seismic ductility" patented technology

The invention discloses a novel steel pipe column and shaped steel beam assembling method. Top flange U-shaped steel or channel steel provided with multiple bolt holes is vertically welded to the two sides faces of a steel pipe column with the section closed and is symmetrical about the axis, lower flange U-shaped steel or channel steel provided with multiple bolt holes is correspondingly welded to the lower portion of the steel pipe column, and a shear web provided with bolt holes is welded to the gap between the top flange U-shaped steel or channel steel and the lower flange U-shaped steel or channel steel; an open type steel beam has an open section, a beam end plate is welded to the end of one side of the open type steel beam, a beam end lug plate is welded to the middle of the beam end plate, bolt holes in the beam end plate correspond to those in the top flange U-shaped steel or channel steel and the lower flange channel steel, and the beam end lug plate corresponds to the bolt holes in the shear web. The method is suitable for assembly and connection between the steel pipe column with the closed section and the steel beam with the open section, the anti-seismic property and ductility of a joint can be improved, the bearing capacity of the joint can be improved, brittle failure of the steel pipe column under static force or earthquake action is avoided, and then high earthquake-resistant ductility of a steel frame structure is guaranteed.

The invention provides a method for reinforcing steel pipe joints by upward movement of a groove-shaped collar plate. A branch pipe is perpendicularly welded at the middle position of the top surface of a main pipe with the reinforced joints; the groove-shaped collar plate is welded on a pipe body of the branch pipe in a sleeving manner and is welded on two sides of the main pipe with the reinforced joints in the direction of the axis of the main pipe or in the direction perpendicular to the axis of the main pipe or welded on the upper surface of the main pipe with the reinforced joints, so that a surrounding welded joint, a center connecting welded joint and a double-side connecting welded joint are formed; and when the groove-shaped collar plate is arranged in the direction of the axis of the main pipe with the reinforced joints and the width of the surface of the main pipe with the reinforced joints difficultly guarantees welding of the double-side connecting welded joint, a flange of the groove-shaped collar plate can be welded with the side wall of the main pipe with the reinforced joints. The method for reinforcing the steel pipe joints by upward movement of the groove-shaped collar plate is not only suitable for reinforcement, repairing and strengthening of the steel pipe joints during service period, but also is suitable for machining the reinforced joints of steel pipe structures in the design stage. In the method, the collar plate and the welded joints of the branch pipe move upwards, the static strength of the joints can be improved, the welded joints of the main pipe and the branch pipe can be protected, brittle failure of the welded joints is avoided, and therefore, the anti-seismic ductility performance of the welding joints is improved.

The invention provides a double-steel-sheet and concrete combined core-tube structure with built-in corrugated steel sheets. The corrugated steel sheet and a plurality of steel cover plates are vertically welded and connected to form an elongated grille steel tube wall board by borrowing ideas from a steel tube and concrete combined structure, high-strength concrete is poured into grille steel tubes to form an elongated grille steel tube and concrete combined shear wall board, and the elongated grille steel tube wall board and in-tube concrete columns are used in a combined mode, complement each other's advantages and work cooperatively. The novel shear wall board is in welding connection with edge steel columns and edge steel beams, and an end portion steel tube concrete core column is arranged at the intersecting corner position of wall bodies of core-tube shear walls to form the novel double-steel-sheet and concrete combined core-tube structure with the built-in corrugated steel sheets. A steel frame-structural system of the novel combined structure core tubes has the advantages of being large in structural rigidity, high in compression bearing capacity, convenient to construct, strong in anti-bending capacity, high in yield load, good in anti-seismic ductility, good in energy dissipation capacity and the like, and the double-steel-sheet and concrete combined core-tube structure can be used for a 60-storey steel structure building and a super high-rise steel structure building with more than 60 storeys.

The invention relates to a lattice type single-row reinforcement T-shaped cross section concrete column and a construction method thereof, and belongs to the field of damping and disaster prevention. The lattice type single-row reinforcement T-shaped cross section concrete column of the invention comprises concrete 1, a ladder lattice-shaped common reinforcing steel bar net 2, lattice single-row reinforcement nets 3, and binding reinforcing steel bars 4. The T-shaped column reinforcing steel bar framework is the T-shaped structure. The three pieces of the lattice single-row reinforcement nets 3 are welded into the three limbs of the T-shaped structure. The ladder lattice-shaped common reinforcing steel bar net 2 is vertically welded on the end parts of the three limbs of the T-shaped lattice single-row reinforcement net. The binding reinforcing steel bars 4 are vertically welded on the horizontal level reinforcing steel bar center position of the common reinforcing steel bar net 2, and are arranged equidistantly along the column height direction. According to the present invention, the lattice type single-row reinforcement T-shaped cross section concrete column adopts the single-row reinforcement, such that the construction is simple, and the use amount of the reinforcing steel bars is less; the lattice reinforcing steel bar sheets are welded to form the reinforcement, such that the industrial production is easily achieved; the lattice reinforcement is adopted, and the shear resistance of the diagonal web reinforcement is good, such that the brittle shear failure of the special-shaped cross section short column can be prevented, and the seismic ductility of the column is improved.

The invention provides a full assembly type steel pipe concrete side frame combined shear wall structure, which comprises a steel pipe concrete post, a prefabricated shear wall and a floor slab, wherein the steel pipe concrete post comprises a steel pipe post and post wall connecting sectional steel welded on the periphery of the steel pipe post; concrete is cast in the steel pipe post; a plurality of screw bolt holes are formed in two sides of the post wall connecting sectional steel, and are used for connecting the prefabricated shear wall; the prefabricated shear wall comprises a reinforced concrete shear wall and embedded sectional steel positioned on the periphery of the reinforced concrete shear wall; a plurality of screw bolt holes are formed in the left side and the right side of the embedded sectional steel, and are used for connecting the post wall connecting sectional steel or the embedded sectional steel of the other prefabricated shear wall; the upper side and the lower side of the embedded sectional steel are provided with end plates; a plurality of screw bolt holes are formed in the end plates and are used for connecting floor slabs. The full assembly type steel pipe concrete side frame combined shear wall structure has the advantages that the joint connection is fast and reliable; the construction is convenient; the construction quality is good; the bearing force is high; the quake-proof performance is good; the construction period is short; components can realize standardized production.

The invention relates to a method for improving anti-earthquake ductility of FRP tendon concrete frame structure, comprising the step of building an FRP tendon concrete frame structure. When building the type of frame structure, a component with effective compressive strength and formability is installed in a zone which can produce larger bending moment under the action of earthquake loading; compression set of the component improves the formability of a construction member concrete compressive zone in the FRP tendon concrete frame structure so as to improve the anti-earthquake ductility of the frame structure. Under the condition of constant FRP tendon formability, the invention effectively increases the deformation of the concrete compressive zone and the curvature ductility of a cross section, overcomes the defect of the brittle failure of the FRP tendon concrete construction member and effectively improves the anti-earthquake ductility thereof.

The invention relates to a method for enhancing a warp angle of a ring mouth flitch of a steel pipe node and belongs to the technical field of construction. The method for enhancing the warp angle of the ring mouth flitch of the steel pipe node is suitable for node reinforcing and repair reinforcing of an existing welded steel pipe structure and machining of an enhanced shaped node of a novel steel pipe structure. The method includes that a ring mouth flitch and the surface of an enhanced joint main pipe are attached and connected through a welding joint. One side of the ring mouth flitch is cut into a hole which is matched with a shape of a branch pipe and welded with the branch pipe. L-shaped ring mouth flitches are symmetrically arranged on both sides of an enhanced node, encircle the branch pipe, and semi-encircle the warp angle of the enhanced node main pipe. The method is suitable for the node reinforcing and repair reinforcing of the existing welded steel pipe structure and machining of the enhanced shaped node of a steel pipe structure, and capable of effectively improving earthquake resistant performance and ductility of a node, improving bearing capacity of the node, ensuring no brittle failure of the welding joint at the root of a steel pipe, and further ensuring good earthquake resistant performance and ductility performance of a space rigid frame or a truss structure.