58results about How to "Improve the stable bearing capacity" patented technology

The invention relates to a composite frame system with beam column flanges being made of steel pipe concrete and a construction method. The composite frame system with the beam column flanges being made of the steel pipe concrete is formed by connecting composite columns with composite beams through joints. The composite beams are horizontally arranged among the composite columns. The joints are steel pipe concrete integral type joints. The composite columns are cross-shaped or I-shaped composite columns with the flanges being made of the circular steel pipe concrete. The composite beams are I-shaped honeycombed beams with the flanges being made of the steel pipe concrete. The joints and the composite columns are fixedly connected at respective connecting plates through high-strength bolts. The joints and the composite beams are connected through buffer sections which are I-shaped honeycombed beams with the flanges being made of the steel pipe concrete. The cross sections of the buffer sections are variable cross sections gradually diminished from the two ends to the centers, and the cross sections of the buffer sections are smallest at the midpoints. The problems that according to an existing steel-concrete composite structure, construction is complex, connection and stability between the composite structure are poor, and the joints are liable to damage under the earthquake effect are solved.

The invention relates to a hinged rectangular-pipe assembled buckling restrained brace with an end rotation limiting function and belongs to the field of structural engineering. The rectangular-pipe assembled buckling restrained brace comprises an I-shaped core member, restrained rectangular steel pipes, vulcanite, steel base plates and high-strength bolts. The core member is a flat steel plate with low strength and high ductility, the vulcanite is adhered on the surface of an area wrapped by a restraining member, the high-strength bolts penetrates bolt holes on the restraining member and the steel base plates, and the two restrained rectangular steel pipes are integrated to form a peripheral restraining member by applying pretension force of the bolts. Four reinforcing benches are respectively welded on end plates. Each reinforcing bench is composed of a bench cover plate and two bench rib plates, wherein the bench cover plate tightly clings to the peripheral restraining member of the buckling restrained brace and reserves a gap with the same. Two hinge joints are provided and are welded by the end plates and lug plates. The peripheral restraining member can effectively limit end rotation angles of hinged rectangular-pipe assembled buckling restrained brace, so that the peripheral restraining member generates a reverse bending moment action.

An anti-buckling supporting member with a lattice type double-rectangular-pipe cross section comprises two anti-buckling branches which are connected through a plurality of steel batten plates, wherein each branch adopts an anti-buckling supporting member provided with a linear core and a restraint concrete-filled rectangular steel pipe; long edges of the two branches are parallelly arranged at appropriate intervals, a lattice type member formed by connecting the plurality of steel batten plates which are distributed longitudinally is taken as a whole for common work, the steel batten plates and branch short edges, namely short edges of the restraint rectangular steel pipes, are in welded connection through trihedral angle welding seams; and end parts of the linear cross section cores of the two branches extend out of circumferential restraint members, and are connected through a ribbed plate to form an H-shaped cross section which can be connected with a frame member through a high-strength bolt and a connecting plate. The lattice type cross section can increase inertia moment of the whole cross section of the anti-buckling supporting member and the whole flexural rigidity, thereby particularly suitable for a design of a large-tonnage anti-buckling support member, the support end part is conveniently connected with the frame member, and the lower branch still can sufficiently play energy-dissipating capacity when eccentric bending moment is added.

The invention discloses a bamboo-shaped buckling-restrained brace, comprising a core component, an external restrained component and reinforced connecting components, wherein the core component is formed by alternately arranging a plurality of circular energy dissipation sections and a plurality of circular elastic sections along a longitudinal coaxial line; each circular elastic section comprises a plurality of middle elastic sections and two end elastic sections; the cross sectional area of each circular energy dissipation section is smaller than that of the corresponding circular elastic section; the core component is positioned in the external restrained component; each reinforced connecting component is composed of a node section, a connecting section and a reinforcing barrel. The bamboo-shaped buckling-restrained brace disclosed by the invention has the advantages that all the circular energy dissipation sections are shorter, and only yield without buckling under the action of an axial force, so that mortar is unnecessarily added or additional parts are unnecessarily arranged for restraining the circular energy dissipation sections, the cross sectional area of each circular energy dissipation section is smaller than that of each circular elastic section, the yielding force is less, and the rigidity requirement on the external restrained component is lower, therefore the external restrained component can be a simple circular casing, and the effects of simple structure, convenience in processing and lighter dead-weight are achieved.

The invention relates to a reinforcement method for a grid structure rod piece, which comprises the following steps that a pressed rod piece which needs to be reinforced is selected, chord member reinforcing frames are arranged on four chord members connected with each spherical joint by using the spherical joint at the end part of the pressed rod piece as the center, each chord member reinforcing frame is formed by four supporting rods arranged between each two adjacent chord members, and both ends of each supporting rod are connected with the corresponding chord members by chord member connecting seats; web member reinforcing frames are arranged on four web members connected with each spherical joint, each web member reinforcing frame is formed by four supporting rods arranged between each two adjacent web members, and both ends of the supporting rod are connected with the corresponding web members by web member connecting seats; and diagonal bars are arranged between each chord member connecting seat and two adjacent web member connecting seats and one reinforcing supporting group is formed by the chord member reinforcing frames, the web member reinforcing frames and the diagonal bars at the position of each spherical joint, so that bearing capacity of the pressure-resistant rod piece is improved.

The invention discloses a structure and a method for strengthening the stability of an H-section upright, and belongs to the technical field of structures. A strengthening steel slab is welded on each of the two sides of the front flange of the H-section upright at an interval of two adjacent stiffening ribs of a wall plate with the stiffening ribs, so that the stable bearing capability of the upright is greatly improved on the basis of the original structure, then the designed section of the upright is further reduced, the stability is improved, the structure is convenient to process and manufacture, the steel is saved, and the production cost is low.

The invention discloses a corrugated web steel column with a cross-shaped section. The corrugated web steel column comprises corrugated steel webs and plain plate flanges and is formed by welding an H-shaped corrugated web steel and two T-shaped corrugated web steel or welding four T-shaped corrugated web steel or welding three corrugated steel webs and four plain plate flanges, wherein the connection points of the corrugated steel webs and the plain plate flanges are in the middle of the width of the plain plate flanges, and the corrugated steel webs are curved, folded or trapezoidal. The steel column is reasonable in section composition, has good mechanical properties, high bearing capacity, good ductility, excellent anti-seismic property and simple structure, is convenient and fast to produce and process, saves steel and is low in cost.

The invention provides a steel bar truss structure resisting downwarping through an upper chord jacking device and application of the steel bar truss structure. The steel bar truss structure comprisesa bottom plate, a steel bar truss and the jacking device, wherein the steel bar truss is arranged on the surface of the bottom plate; and an upper chord rib of the steel bar truss is broken, the jacking device is inserted into the broken position of the upper chord rib, the steel bar truss drives the bottom plate to arch upwards, the pre-arching function is achieved, the pre-arching height and the lower deflection generated when the steel bar truss bears loads in the later assembling process are offset, and therefore the flatness of the assembled steel bar truss is guaranteed as much as possible, the situation of large-angle downwarping is avoided, and the engineering quality is further guaranteed. The jacking device is simple in structure, low in cost and convenient to assemble.

The invention provides a fastener-style steel pipe template support system design method. Through ABAQUS finite element software, a finite element model of a fastener-style steel pipe template supportsystem is built; a law of influence of multiple separate erection parameters and combination parameters on bearing capacity of the support system is analyzed and researched more comprehensively; theerection parameters of the fastener-style steel pipe template support system are subjected to reasonable value-taking; the strength advantage of the support system is fully exerted; stable bearing capacity of a whole bracket is improved; and a great reference basis is provided for safety control of the support system.

The invention discloses a detachable buckling-restrained reinforcing device for a power transmission tower. The detachable buckling-restrained reinforcing device is mainly composed of three parts, andcomprises reinforcing steel plates, hoops and high-strength bolts, wherein the reinforcing steel plates are arranged on the outer side of an original main material, the axial direction of the reinforcing steel plates is consistent with that of the original main material, a plurality of hoops are sequentially distributed at equal intervals in the axial direction of the reinforcing steel plates, and the hoops can be additionally arranged at the weak positions of rod pieces; and the hoops are fixedly connected with the reinforcing steel plates through the high-strength bolts. For a round pipe component, the four reinforcing steel plates are distributed on the upper portion, the lower portion, the left portion and the right portion of the section of the original main material and fixed together through the four identical hoops by means of the high-strength bolts. For an angle steel rod piece, the two reinforcing steel plates are distributed on the outer side of an angle steel flange and fixed together through the two different hoops on the inner side and the outer side by means of the high-strength bolts.

A latticed anti-buckling supporting member provided with double T-shaped cores is formed by connecting two anti-buckling branches through a plurality of steel lattice plates respectively, wherein each anti-buckling branch supporting member adopts a T-shaped core member and a rectangular restrained concrete filled steel tube; long edges of the two branches are arranged in parallel at an appropriate interval, the latticed member is formed by connecting a plurality of longitudinally distributed steel lattice plates, the steel lattice plates are in welded connection with short edges of the branches through trihedral fillet welds, and the edge of the branches are the short edges of the rectangular restrained steel tubes. Ends of the two T-shaped core members extend out of the rectangular restrained steel tubes, and a ribbed plate is welded between outwards extending plates of the two cores, so that an H-shaped section is formed and can be connected with a frame member through a high-strength bolt and a connecting plate. The latticed section can increase the inertia moment of a whole section of the anti-buckling supporting member and the whole anti-bending stiffness and is particularly suitable for the design of a large-tonnage anti-buckling supporting member, a supporting end and the frame member are conveniently connected, and the energy-consuming capacity of the branches can be fully exerted under the action of an additional eccentric bending moment.

A novel buckling energy consumption prevention pipe comprises an outer constraint pipe, an inner core energy consumption pipe and a cover plate; the inner core energy consumption pipe is arranged in the outer constraint pipe in a coaxial clearance manner; at least two rows of energy consumption devices are arranged on the inner core energy consumption pipe in the circular direction, and at least two energy consumption holes are formed in each energy consumption device; longitudinal stiffening ribs are arranged at the positions, between the adjacent rows of energy consumption devices, of the inner core energy consumption pipe, and transverse stiffening devices are arranged between the adjacent longitudinal stiffening ribs; and the two ends of the outer constraint pipe are fixedly connected with the cover plate, and the two ends of the inner core energy consumption pipe stretch out of the cover plate and are in sealed connection. The invention further provides a manufacturing technology of the novel buckling energy consumption prevention pipe. The novel buckling energy consumption prevention pipe and the manufacturing technology of the novel buckling energy consumption prevention pipe have the good ductility, good anti-fatigue performance, good impact resistance performance, good stability, good durability, good bearing force, and good energy consumption performance.

The invention discloses a box-section column of a corrugated steel web-concrete filled steel tube flange combination. Two webs and two flanges are connected to form a box-shaped structure, wherein the webs are corrugated steel webs; the periodically repeated corrugated edges of the corrugated steel webs are perpendicular to the length direction of a component; the non-corrugated edges of the corrugated steel webs are welded to the two width ends of the flanges; the flanges are concrete filled steel tube flanges including steel tubes and concrete in the steel tubes; the concrete is self-compacting concrete. According to the box-section column of corrugated steel web-concrete filled steel tube flange combination disclosed by the invention, the structural behavior of the box-section column of existing flat webs is improved and the comprehensive cost of the project is not increased significantly, so that the box-section column of corrugated steel web-concrete filled steel tube flange combination can be applied widely in projects.

The invention discloses a super-long-span dome structure. The super-long-span dome structure comprises multiple variable-cross-section midspan dual-limb cavity giant arches with a joint rotating shaft, upper limbs and lower limbs in the variable-cross-section midspan dual-limb cavity giant arches define cavity structures, two energy dissipating vibration reducing devices are symmetrically mountedin each cavity structure, the energy dissipating vibration reducing devices in the variable-cross-section midspan dual-limb cavity giant arches are located on the same circumference, branch limbs of the upper limbs and the lower limbs are fixedly connected with a first ring truss, at least two giant variable-cross-section space trusses are evenly mounted in an annular interval between the variable-cross-section midspan dual-limb cavity giant arches, the upper end of the giant variable-cross-section space trusses are fixedly connected with a first ring truss, the first ring truss is covered with a first dome surface single-layer net shell, each space is covered with a second dome surface single-layer net shell fixedly connected with the first ring truss, due to the dome structure, the stress property is greatly improved, the structure rigidity is uniform, joint configuration is relatively simple, and in the building process, large geometrically nonlinear deformation cannot be generated.

The invention relates to the technical field of steel structure residences and public buildings, in particular to a steel-concrete combined special-shaped lattice column. The combined special-shaped lattice column is composed of a concrete-filled square steel tubular column, channel steel and a lacing bar, two types of structures exist in total and are a type I and a type II, each type has three cross-sectional forms, namely an L shape, a T shape and a cross shape, and a bolt assembly type K-shaped lacing bar connection mode is adopted. The column overcomes the problems that in the prior art that structural arrangement is not flexible, component factory prefabrication is difficult, and a component standardization degree is not high, most of adopted components can be prefabricated in a factory, field assembly is fast, construction is convenient, the problem of a convex column is solved, filling with a prefabricated autoclaved building block is conducted, and the intelligent combined special-shaped lattice column integrating a structure, heat preservation and sound insulation is formed.

The invention discloses a prestressed fish belly sill with inclined stay bars for retaining and protecting for deep foundation excavation. The prestressed fish belly sill with the inclined stay bars for retaining and protecting for deep foundation excavation comprises a waist beam, at least one stay bar and at least one pull cable; the stay bars are positioned on angular bisectors of the adjacentpull cables, length adjusting devices are serially connected into the stay bars, and the pull cables comprise stand cables. Two ends of the fish belly sill are spliced with adjacent surrounding purlins, and symmetric or angle brace supports are arranged at the ends of the fish belly sill. By application of prestress and the supporting effect of the stay bars to the waist beam, the bending stiffness of the fish belly sill is high, the number of braces can be reduced, and thus, an operation space in the pit is increased. The stay bars are only subjected to axial pressure, and are high in stability bearing capacity; the lengths of the stay bars are adjusted according to monitoring data, and deformation of a foundation pit supporting structure can be controlled well; and by mounting of the standby cables, the rigidity and emergency capacity of the fish belly sill are improved.

The invention discloses a method for lateral displacement resistance of full-fastener-type steel tube scaffolds. The method for lateral displacement resistance of the full-fastener-type steel tube scaffolds is used for a building lower than 3 meters. The full-fastener-type steel tube scaffolds serve as building formwork supports and are erected in a mode of equal step pitch. A row of inclined supports are arranged in the center of a storey in the transverse direction, a row of inclined supports are arranged in the center of the storey in the longitudinal direction, and the height of each inclined support is equal to the step pitch of the scaffolds. The upper end of each inclined support is fixed with an upright through a rotary fastener and the lower end of each inclined support is fixed with inclined support fixing soles through rotary fasteners. The angle between each inclined support and the ground is 45degrees-60degrees. The space between every two inclined supports is equal to that of every two uprights. The method is on the basis of the standard construction requirements and the standard construction method of traditional full-fastener-type steel tube scaffolds, the lateral displacement resistant inclined supports and the inclined support fixing soles are additionally arranged, the large-wave curved instability mode of the full-fastener-type steel tube scaffolds is changed, and the overall stable bearing capacity of the full-fastener-type steel tube scaffolds is improved or the step pitch of the high and large formwork full-fastener-type steel tube scaffolds is increased under the condition of the same overall stable bearing capacity.

A fabricated stay bar prestressing sandwich pipe concrete combined member comprises a sandwich pipe concrete column, prestressed cables, stay bars, cableways and cable heads. Each pair of stay bars issymmetrically arranged and is perpendicular to the sandwich pipe concrete column, and the ends of the stay bars are fixedly connected with the cableways. The prestressed cables penetrate into the cableways, and the two ends of each prestressed cable are fixedly connected to the cable heads mounted at the two ends of the sandwich pipe concrete column correspondingly. The axes of the stay bars, theaxes of the cableways and the axis of the sandwich pipe concrete column are located in the same plane. The two prestressed cables on the two sides of the sandwich pipe concrete column are symmetrically arranged in an inclined broken line manner. The fabricated stay bar prestressing sandwich pipe concrete combined member has the advantages of being high in bearing capacity, good in fire resistingperformance and fast to construct.

The invention discloses a fold line type single-layered cylindrical latticed shell structure. The fold line type single-layered cylindrical latticed shell structure comprises a plurality of first steel archs and a plurality of second steel archs, and is characterized in that the plane where the first steel archs are arranged is parallel to the plane where the second steel arch centers are arranged; the direction vertical to the plane where the first steel archs are arranged or the plane where the second steel archs are arranged is a length direction; the first steel archs and the second steel archs are alternatively arranged at equal distances along the length direction; the heights of the plurality of first steel archs are the same; the heights of the plurality of second steel archs are the same and are lower than the heights of the first steel archs; a plurality of reinforcing ribs are welded between each first steel arch and the adjacent second steel arch. The fold line type single-layered cylindrical latticed shell structure with high flexural rigidity and high stable carrying capacity is realized.

The invention provides an integrated cold-formed thin-walled steel plate constraint profile steel special-shaped column and a machining method thereof. The special-shaped column comprises a cold-formed thin-walled special-shaped steel pipe column and a built-in cold-formed thin-walled steel member; the cold-formed thin-walled special-shaped steel pipe column is a special-shaped hollow steel pipe formed by cold bending; the cross section of the cold-formed thin-walled special-shaped steel pipe column is integrally L-shaped, T-shaped or cross-shaped; the built-in cold-formed thin-walled steel member is embedded and inserted in a notch of a groove-shaped column limb; and the built-in cold-formed thin-walled steel member is connected with the straight supporting surface through a self-tapping screw. The integrated cold-formed thin-walled steel plate constraint profile steel special-shaped column is adopted as a vertical bearing component, indoor column protruding can be avoided, and the building use function and attractiveness requirements are met. The width-to-thickness ratio of the section of the special-shaped steel pipe column is large, local buckling is prone to occurring, and the situation that the bearing capacity is reduced due to local buckling of a plate can be avoided through the built-in cold-formed thin-walled steel member.

Belonging to the field of structural engineering, the invention relates to a corrugated web box-section steel-concrete combined arch. The combined arch is characterized in that it is formed by direct butt welding of two corrugated web H-shaped section steel arches through an upper flat flange plate and a lower flat flange plate along the arch axis direction; and concrete is poured into the box-section to form a steel tube concrete combined arch structure. The corrugated web H-shaped section steel arches have a biaxial symmetric H-shaped section or uniaxial symmetric H-shaped section, and the corrugated web is a trapezoidal zigzag steel plate or sinusoidal wave steel plate. The combined arch provided by the invention is a large span space structure member with superior overall mechanical performance, and has the characteristics of convenient manufacturing, clear labor division of section stress. The box-section has strong torsional stiffness and arch axial out-of-plane flexural rigidity. The restraint function provided by the corrugated web improves the compressive strength and ductility of core concrete, and the supporting effect provided by the core concrete strengthens the local stability of the corrugated web and the flange plates.

The invention discloses a steel-reinforced concrete specially-shaped column with an L-shaped cross section and quadrangular holes in steel-reinforced webs. The steel-reinforced concrete specially-shaped column comprises a steel-reinforced framework, a steel reinforcement framework and concrete, wherein the steel-reinforced framework has the L-shaped cross section and comprises the two steel-reinforced webs and two steel-reinforced flanges, and a plurality of quadrangular holes are formed in the steel-reinforced webs; the steel reinforcement framework comprises longitudinal steel reinforcements and stirrups; the steel-reinforced framework is positioned at the center of the cross section of the specially-shaped column; the steel reinforcement framework is arranged around the steel-reinforced framework; the steel-reinforced framework and the steel reinforcement framework are wrapped by the concrete. The steel-reinforced concrete specially-shaped column has the advantages that no anti-shear connecting piece is used, so that the steel quantity is reduced, the adhesive property between the steel frameworks and the concrete is enhanced, the cooperative working capacity between the steel frameworks and the concrete is improved, and the slippage of the steel frameworks and the concrete is alleviated; the stable bearing capacity of the steel frameworks is improved, and the fireproof and anti-corrosion functions are achieved under the condition of not increasing extra charge; the steel-reinforced concrete specially-shaped column is simple and convenient in construction, and the comprehensive engineering cost is reduced.

The invention discloses a novel composite rod with a built-in hollow bamboo pipe, and relates to a combined rod. Further application of natural bamboos in a building structure is prevented due to theproblems that the natural bamboos are naturally uneven and are easy to crack in a circumferential direction and difficult to standardize, and the like. The novel composite rod comprises a GFRP (GlassFiber Reinforced Polymer) pipe, a bamboo pipe arranged in the GFRP pipe and a concrete layer which is filled between the GFRP pipe and the bamboo pipe, wherein the bamboo pipe is the natural hollow bamboo pipe; one or multiple bamboo pipes are arranged in the GFRP pipe; the bamboo pipe is in equal height with the GFRP pipe or is shorter than the GFRP pipe. The bamboo pipe is used as an inner pipeof hollow sandwich GFRP pipe concrete and is coated in concrete, and the problems that the bamboo pipe is naturally uneven and is easy to crack in the circumferential direction can be avoided, so thatthe natural bamboo pipe can be reasonably utilized, and the cost can be effectively reduced on the premise that enough strength of the combined rod is ensured; the concrete is filled between the bamboo pipe and the outer GFRP pipe, stressed cracking of the bamboo pipe can be avoided, and inward local unstability of the GFRP pipe is avoided.