2815results about "Girders" patented technology

A U-shaped recycled concrete composite beam, and a design and construction method therefor, the U-shaped recycled concrete composite beam comprising a prefabricated concrete casing (11) and cast-in-place compression-zone concrete (12), wherein the prefabricated concrete casing (11) is a recycled concrete casing, and has a U-shaped appearance; the cast-in-place compression-zone concrete (12) is high strength concrete, and the cast-in-place compression-zone concrete (12) is concrete with a strength grade of C50-C80; the thickness h1 of the bottom of the prefabricated concrete casing (11) is not less than 80 mm, and the widths b1 and b3 of lateral surfaces of the prefabricated concrete casing (11) are both not less than 45 mm; the width b2 of the cast-in-place compression-zone concrete (12) is not less than 100 mm; and a steel bar cage is provided in the U-shaped recycled concrete composite beam to serve as a framework. Compared with the prior art, the fire-resistant characteristic of recycled concrete and the excellent mechanical properties of high-strength concrete are fully exerted, the flexural bearing capacity and ductility of the recycled concrete beam can be effectively improved at room temperature, the bursting phenomenon of a fire-exposed surface is reduced at a high temperature, and the temperature field in the beam is significantly reduced.

A restrained joint apparatus, applications of the apparatus, and methods for making the apparatus are described. The apparatus is a wood-frame coupling that establishes the restrained joint with movement resistance and moment resistance of a wood member coupled with a frame. The frame includes a body with a wall. The frame can be a unitary structure wherein the wall of the body is arranged to replace an outer perimeter of the end of the wood member so that the wood member and the frame form the wood-frame coupling. In another embodiment, the frame is formed of a plurality of frame plates joined together about the perimeter of the wood member. The invention includes various applications for the wood-frame coupling where a restrained joint is useful such as in an EMC composite member configuration. The invention includes a method of making the wood-frame coupling wherein the first described is forced onto and into the end of the wood member.

A building framework is disclosed herein having a first structural member, a second structural member, and a third structural member disposed between the first and second structural members, a first web member connecting the first and third structural members in a spaced apart relationship, and a second web member connecting the second and third structural members in a spaced apart relationship. The first web member is positioned relative to the second web member such that the shortest distance between the first web member and second web member is greater than or equal to 5 times the thickness of the third structural member. Additional products, systems, and methods also are disclosed.

A beam-slab integrated prefabricated waffle slab structure and a construction method thereof are provided, the structure includes columns, arranged in an array, and a beam and slab support element and a beam support element being disposed on each column; two ends of each prefabricated frame beam being respectively disposed on the beam support elements, a main support element being disposed on front and rear sidewalls of each prefabricated frame beam; prefabricated waffle beam-slab units, each disposed between the prefabricated frame beams. The construction method includes completing array construction of the columns; installing the beam and slab support element and the beam support element on each column; installing the prefabricated frame beam on two columns; installing the prefabricated waffle beam-slab units between the prefabricated frame beams; installing main beam top rebar skeletons and ribbed beam top rebar skeletons; installing horizontal slab rebars and longitudinal slab rebars; and pouring concrete at nodes.

The invention discloses a cast-in-place beam steel bar truss floor support plate installation construction quality control method and system based on BIM and VR. The method comprises the following steps of BIM three-dimensional modeling, construction scheme simulation, VR scene building, 3D scanning and model comparison, unmanned aerial vehicle cruise monitoring and real-time interaction and cooperative management. A whole-process, visual and interactive construction quality control system is constructed, so that constructors can intuitively and clearly know details such as spatial positions and connection modes of all components, the understanding difficulty is greatly reduced, and construction errors caused by drawing understanding deviation are effectively reduced; scheme simulation optimization before construction of the steel bar truss floor support plate, real-time dynamic monitoring in construction and efficient collaborative management of all construction parties are realized, so that the construction quality risk is pre-judged in advance, the construction deviation is corrected in time, and the accuracy and efficiency of construction quality control are improved; the construction cost is reduced, the construction period is shortened, and the construction quality of the steel bar truss floor support plate meets high-standard requirements.

A method of assembling a modular space frame support system includes providing a first frame including at least four interconnection structures, at least four joists, and a plurality of interconnection structure brackets. The method further includes providing a second frame including at least four interconnection structures, a plurality of interconnection structure brackets, and at least one of four chords or four joists, each of the interconnection structure brackets coupled between a first end and a second end of a respective one of the interconnection structures. The method further includes providing at least one of a diagonal chord and a vertical support and coupling the at least one of the diagonal chord and the vertical support to at least one of the interconnection structure brackets of the first frame and at least one of the interconnection structure brackets of the second frame.

The invention provides a reinforcing beam reinforced by adopting an out-of-service wind power blade and a method for determining the bending rigidity. According to the reinforcing beam, a plurality of grooves are formed in at least one surface of a reinforced concrete beam; the reinforcing layer comprises reinforcing ribs and a cement-based composite matrix, a plurality of protrusions are arranged on the surface of the cement-based composite matrix, the protrusions are arranged at intervals in the length direction of the cement-based composite matrix, and the protrusions are correspondingly embedded into the grooves, so that the reinforcing layer is connected with the reinforced concrete beam to obtain a reinforced concrete reinforced beam; wherein the reinforcing ribs are obtained by disassembling and cutting a main beam of the retired wind power blade. According to the reinforcing beam, the combining capacity of the reinforced concrete beam and the reinforcing layer is high, mutual slippage is avoided, the retired wind power blade composite material resources are utilized, the environment is protected, and the cost is saved while high-performance reinforcing treatment can be conducted on the damaged reinforced concrete beam structure or the reinforced concrete beam structure with insufficient bearing capacity.

A one-piece truss adapter for supporting single-axis trackers with truss foundations. A upside-down Y-shaped structure has bearing support portion and an opposing pair of legs with an angularly adjustable connector for securely joining the one-piece adapter to a pair of driven screw anchors at different angular orientations. Each leg terminates in a connector that is received in a socket integral to a driving coupler at the head of each screw anchor. A retaining nut may hold the connector in place to complete the angularly adjustable assembly.

The utility model discloses a mechanical pressurized air supply structure for an antechamber of a building, comprising an air inlet pipe, a pressurized air supply fan, an electric regulating valve, a 70°C fire damper, an electric normally closed valve, a pressurized air supply port, a residual pressure sensor, an air supply main pipe and an air supply branch pipe, wherein the air inlet pipe and the pressurized air supply fan are arranged in a special fan room, and the air supply main pipe is laid in a civil engineering air shaft; the air supply branch pipe passes through a partition wall of the civil engineering air shaft and is laid on the top of an upturned beam bottom of an antechamber, the air supply branch pipe is connected with the air supply main pipe, the air inlet pipe is connected with the pressurized air supply fan, the pressurized air supply fan is connected with the air supply main pipe through the electric regulating valve and the 70°C fire damper in sequence, and the air supply branch pipe entering the antechamber of each floor is provided with an electric normally closed valve and a pressurized air supply port. The utility model arranges an upturned beam at the partition wall of the civil construction air shaft so that the top of the pressurized air supply branch pipe is close to the upturned beam and the bottom is almost level with the bottom of the top plate of the front room, and is laid to connect to the front room. The air duct occupies a small net height of the front room, and at the same time, a suspended ceiling decoration is adopted to eliminate the influence of the air supply branch pipe extending into the front room on the visual impact of the front room.

The utility model relates to the technical field of building structures, in particular to a concrete module and a full-prefabricated concrete modular building structure system, which comprise shear wall leaf plates, partition walls, a top plate, a bottom plate and beam shells, the bottom plate serves as the bottom face of the concrete module, and the top plate serves as the top face of the concrete module. The shear wall leaf plates and the partition walls form the four side faces of the concrete module. The shear wall leaf plates are arranged at the corners of the concrete modules, and the partition wall is arranged between the two shear wall leaf plates. A first cavity used for pouring concrete is formed in the shear wall leaf plate; the height of the shear wall leaf plate is larger than that of the partition wall, the beam shell is arranged on the top of the partition wall, a second cavity used for pouring concrete is formed in the beam shell, and the second cavity is communicated with the first cavity so that the beam shell and the shear wall leaf plate can form a whole after the concrete is poured.

The invention discloses a local buckling prevention stiffening rib structure which comprises a main component and a stiffening rib group, the main component is a box-shaped component, and the middle part in the box is tensioned and reinforced through the stiffening rib group; the main component comprises a left web plate, a right web plate and two flanges which are arranged up and down, the web plates are convex in the initial state, and the upper sides and the lower sides of the two web plates are connected through the flanges; the stiffening rib set comprises a left stiffening rib and a right stiffening rib, and each stiffening rib comprises a stiffening rib web and a stiffening rib flange. The design method comprises the following steps: step 1, measuring an initial state bending value of the web plate; 2, determining the relationship among parameters of the stiffening rib group when the main component is in the design state; and 3, calculating the deflection generated by the web plate due to pulling and connecting of the stiffening rib group. The structure is good in pulling and connecting effect, and the stiffening rib prestress established in the method completely prevents or greatly relieves the local buckling behavior of the web.

The utility model relates to the technical field of building construction, and discloses a segmented butt joint construction structure of large-span steel beams, which comprises a plurality of steel beams which are sequentially connected end to end, fixing columns are arranged at the head end of the first steel beam and the tail end of the last steel beam, temporary buttresses are arranged at the joints of the middle steel beams, and the temporary buttresses are connected with the steel beams. And the temporary buttresses are used for supporting and fixing the segmented parts of the steel beam. The temporary buttresses are used for temporarily supporting the sections of the steel beam, the sections of the steel beam are prevented from being broken and collapsed due to gravity, the buckling grooves and the buckling blocks are arranged on the connecting sections of the steel beam for pre-fixed connection, and the sections of the steel beam are pre-fixed under the action of the temporary buttresses. The situation that the position of the steel beam swings randomly when the steel beam is hoisted is avoided, an operator can further reinforce the steel beam on the basis of pre-fixing, the fixing bolts are fixed in the first steel beam and the second steel beam through the operation grooves, and the convenience of mounting and fixing is improved.

The invention discloses a tension-shear integrated fabricated frame structure beam-column connection joint and a construction method thereof, and relates to the technical field of fabricated structures, and the technical scheme is characterized in that the tension-shear integrated fabricated frame structure beam-column connection joint comprises a fabricated frame column and a fabricated frame superposed beam, and a groove used for placing a superposed floor slab is reserved in the position, at the floor slab, of a column body of the fabricated frame column; a first steel bar threaded sleeve is pre-embedded in the groove and is used for mounting plate upper steel bars; second steel bar threaded sleeves are embedded in the grooves and used for installing beam upper steel bars. I-shaped connecting pieces are pre-buried in the positions, below the grooves, of the assembly type frame columns and used for installing the assembly type frame superposed beams. Small-diameter steel bar threaded sleeves are pre-buried in the positions, below the I-shaped connecting pieces, of the assembly type frame columns and used for installing masonry tie bars. By separating beam-column connection and column-column connection of the assembly type frame structure, column-column connection is improved to the middle position of the floor height, the reinforcing steel bar density of beam-column connection joints at the floor position is reduced, and the installation and pouring difficulty is reduced.

The invention discloses a double-beam and shear wall connecting structure in a modular building and a construction technology, the double-beam and shear wall connecting structure is provided with two shear walls and two superposed beams which are arranged in parallel, each superposed beam comprises a precast beam and a beam cast-in-place concrete layer, edge members are arranged at the two ends of each shear wall, and part of reinforcing steel bars of the superposed beams are anchored into the shear walls; connecting gaps are formed between the two shear walls and between the two prefabricated beams respectively, beam end cast-in-place areas are arranged at the ends, close to the shear walls, of the prefabricated beams, the beam end cast-in-place areas are the positions where plastic hinges are located, and the beam end cast-in-place areas of the two prefabricated beams communicate with each other. The concrete of the beam end cast-in-place area, the beam cast-in-place concrete layer and the connecting gap is poured together on site. According to the structure, the overall continuity can be better guaranteed, stronger overall connection is formed between the beam and the shear wall, and better toughness and ductility can be provided.

The present invention discloses a method for constructing a large-volume, high-support prestressed concrete beam, which belongs to the technical field of prestressed beam construction. The construction preparation work includes presetting a full-length steel wire rope in a reserved channel for prestressed steel strands, installing a steel strand anchoring mechanism on the entrance side of the reserved channel, installing a limit plate on the exit side of the reserved channel, and presetting marks at the corresponding lengths of the steel strands extending from the movable pipe according to the length of the reserved channel; using the steel strand anchoring mechanism, multiple steel strands are synchronously pulled to the limit plate for cooperation, and the marks on the steel strands are adjusted to the same plane; the steel strands outside the reserved pipe near the anchor plate are cut, and a movable plate is installed, and the movable plates on both sides of the steel strands are tensioned to a preset elongation value; after tensioning is completed, grouting is performed in the reserved channel, and concrete is poured to form the beam body. The present invention can pipe multiple steel strands in the reserved channel as a whole, avoiding friction on the inner wall of the reserved channel and on the steel strands caused by pipe-lining individual steel strands.

The utility model provides a prefabricated concrete beam dry type connection node, which belongs to the field of prefabricated buildings, and is characterized in that an upper high-strength bolt is arranged above the top surface (within the height of a floor) of a prefabricated concrete beam so as to increase the connection arm of force of the upper high-strength bolt, so that equal-strength node connection with a steel bar in the beam is realized by utilizing a single large-diameter high-strength bolt; the installation convenience is greatly improved; the upper high-strength bolt and the lower high-strength bolt are combined for clamping, so that tensile and compression-resistant bidirectional force transmission is realized (in a normal state, the upper high-strength bolt is tensile, and the lower high-strength bolt is compression-resistant; ), so as to cope with the bending moment change of the precast concrete beam under the action of the reciprocating load.

The utility model discloses a reinforcing structure for a wooden roof frame of a building, relates to the technical field of reinforcing engineering of traditional wooden roof frames, and aims to solve the problem that at least one of the sense of history of the building and the increase of engineering cost cannot be reserved during reinforcing of a wooden roof in the prior art. The reinforcing structure comprises a lower chord prestressed pull rod and a vertical web prestressed pull rod, the lower chord prestress pull rod is arranged along the lower chord, the end of the lower chord prestress pull rod is fixedly connected with the lower chord of the wooden roof truss, and prestress is applied to the lower chord through the lower chord prestress pull rod; the vertical web prestress pull rods are arranged along the vertical web members, the ends of the vertical web prestress pull rods are fixedly connected with the vertical web members of the wooden roof truss, and prestress is applied to the vertical web members through the vertical web prestress pull rods. The reinforcing device can be used for reinforcing the wooden roof truss of the building.

The invention provides a large curtain wall pre-embedding-free keel installation system and an installation method, which overcome the problems of a traditional keel pre-embedding construction scheme, reduce the installation cost, improve the installation precision, the construction efficiency and the reliability, reduce the safety risk and reduce the influence on a main body structure, and comprise a reinforced concrete slab and a reinforced concrete beam, an upper end plate and a lower end plate are respectively arranged on the top surface and the bottom surface of the reinforced concrete beam; the outer side and the inner side of the reinforced concrete beam are each provided with a plurality of vertically-distributed screws, and the upper ends and the lower ends of the screws located on the outer side of the reinforced concrete beam are connected with the upper end plate and the lower end plate correspondingly. When the curtain wall main keel is installed, the curtain wall main keel is located between two reinforced concrete beams corresponding to an upper floor and a lower floor of a building, the upper end of the curtain wall main keel is connected with the lower end plate located on the upper layer, and the lower end of the curtain wall main keel is connected with the upper end plate located on the lower layer.

The invention discloses an adjustable steel structure splicing platform, and relates to the technical field of steel structure splicing, the adjustable steel structure splicing platform comprises a platform main body, the left side and the right side of the platform main body are symmetrically provided with first sliding rails, and chord member supporting pieces are symmetrically arranged on the platform main body front and back and used for supporting the two ends of a chord member set; and an assembling mechanism is arranged on the platform main body. The device has the advantages that the diagonal web members, the vertical web members and the corresponding chord members are spliced through the splicing mechanism so as to change according to different connection angles stipulated between the members, the splicing angle between the diagonal web members and the corresponding chord members and the splicing angle between the vertical web members and the corresponding chord members can be adapted, and the flexibility of splicing equipment is improved; the diagonal web member sets and the vertical web member sets are sequentially and alternately spliced, the splicing efficiency is improved, mechanical rotating adjustment, alignment and butt joint are achieved through the splicing mechanism, meanwhile, the two limiting pieces limit the corresponding chord members, and the quality of follow-up welding machining is improved.

The utility model discloses a bamboo-based composite building profile, comprising a bamboo core layer, wherein the bamboo core layer is composed of hollow round bamboos arranged in a staggered manner according to large and small ends, a bamboo winding layer is arranged on the periphery of the bamboo core layer, the bamboo winding layer is fixedly connected to the bamboo core layer through an adhesive layer, the bamboo winding layer and the bamboo core layer are fixedly connected to form a profile, the bamboo winding layer comprises a multi-layer bamboo strip curtain, the bamboo strip curtain is composed of a plurality of bamboo strips arranged side by side and bonded to a connecting piece, or the bamboo strip curtain is a continuous bamboo strip curtain formed by weaving a plurality of bamboo strips and a connecting piece. The bamboo strips naturally have good mechanical properties of tensile strength along the grain, so as to enhance the bending strength and rigidity of the profile, and greatly improve the bearing capacity of the bamboo-based profile.

The invention discloses a construction method for a large-span truss steel structure roof. The construction method comprises the following steps that 1, roof splicing is completed on a floor slab surface; the joint shaft joint outer lug plate is fixed to the roof; 2, the roof is lifted upwards through a lifting system, and after the roof is lifted to the first height, the assembling jig frame is disassembled; 3, a joint shaft joint inner lug plate fixed to the end of the bifurcated column is inserted between the two joint shaft joint outer lug plates, and a pin shaft is inserted into a pin shaft hole in the lug plate; 4, the roof is lifted step by step, and in the lifting process, the bifurcated columns are adjusted to be in the vertical posture from the inclined posture; continuously lifting the roof to the designed height; and 5, adjusting the posture of the bifurcated column, and connecting the lower end of the bifurcated column with the top of the supporting column. The method solves the problems that the joint shaft of the bifurcated column is difficult to install, the bifurcated column cannot be hoisted in place in a high-altitude narrow space, and the pin shaft of the joint shaft of the bifurcated column is high in high-altitude assembly difficulty.

The invention discloses a corrosion-resistant large-span prefabricated double-T plate and a connecting structure thereof, and belongs to the field of building components, the corrosion-resistant large-span prefabricated double-T plate comprises two double-T plate bodies and two cross beams, each double-T plate body comprises a panel, two ribbed beams are integrally formed at the bottom of each panel, edge grooves are formed in the left side and the right side of the upper surface of each panel, and the two cross beams are arranged in the edge grooves. According to the invention, all the parts are relatively independent and mutually associated, so that in the building use process, if the structure needs to be locally adjusted or expanded, such as increasing the roof area and changing the equipment mounting position, operation can be conveniently carried out, and the construction efficiency is improved. If part of the jointed boards are dismantled or the connecting positions of the cross beams and the longitudinal beams are adjusted and then the jointed boards are spliced and fixed again, the whole building structure cannot be greatly damaged or the overall stability of the building structure cannot be influenced; the connection operation between a plurality of double-T plate main bodies and the cross beam is simple, convenient and rapid, and the installation efficiency can be greatly improved.

The invention relates to the field of steel member engineering, in particular to a high-strength steel combined multi-chamber box-section bent steel member and a manufacturing method thereof, and the manufacturing method comprises the following specific steps: S1, obtaining the design form of the steel member; s2, preparing an outer side chamber of the steel member; s3, prestress is applied to the outer side chamber in the axial direction of the outer side chamber so that the outer side chamber can be bent to a first form, a first eccentric value of the first form is obtained, and the first eccentric value is larger than the designed eccentric value; s4, top pressure towards the inner side of the bend is applied to the first form to a second form, the second form is in a pre-tightening state, a second eccentric value of the second form is obtained, and the second eccentric value is smaller than the designed eccentric value; s5, the outer side chamber is kept in the second form, and the matched inner side chamber is welded to obtain the steel member; and S6, after the force is unloaded, the inner side chamber is subjected to pre-tensile stress, the outer side chamber is subjected to pre-compressive stress, and the steel member is obtained. Pre-tensile stress is applied to the inner side of the steel member, pre-compressive stress is applied to the outer side of the steel member, and therefore the axial compression buckling ultimate load of the bent steel member is increased.

The invention belongs to the technical field of added elevators, and discloses a fast-assembly type added elevator steel structure main body and a preparation and assembly method thereof, and the fast-assembly type added elevator steel structure main body comprises a hoistway, a door frame and a corridor. The hoistway is composed of four vertical stand columns and a plurality of transverse beams, the ends of the beams are connected with the connecting faces of the stand columns through connecting pieces, each connecting piece comprises a pair of triangular pieces formed by three steel plates perpendicular to one another, a first plate is connected with the stand columns, a second plate is connected with the beams, and a third plate is an inclined strut reinforcing rib. The door frame comprises door head steel beams between the front stand columns, sill steel beams and landing door stand columns between the sill steel beams, the corridor is connected with the outer sides of the sill steel beams, and through holes in the ends of the edge beams are matched with kidney-shaped holes of the mounting bases to adjust the position. The square pipe joints of the front stand column and the rear stand column are staggered in position. The device is fast to install, stable in structure, convenient to adjust, convenient to overhaul and maintain and suitable for the elevator adding project of the existing building.

The invention belongs to the field of constructional engineering, and particularly relates to a connecting joint of a prefabricated reinforced concrete column and a prestressed steel reinforced concrete beam and a construction technology. The structure for connecting the joint by adopting the pi-shaped connecting piece is as follows: one end of the prestressed steel reinforced concrete beam is connected with the pi-shaped connecting piece of the prefabricated reinforced concrete column, a concrete layer is arranged at the top of the section steel at the end, the bottom of the section steel is exposed, and a vertically through bolt channel is arranged along the vertical direction; and one end of the prefabricated prestressed steel reinforced concrete beam extends between the upper web plate and the lower web plate of the pi-shaped connecting piece and is in close contact fit with the upper web plate and the lower web plate. According to the structure of the overhanging short beam-flange clamping sleeve connecting joint, an overhanging short beam is arranged at the joint of a prefabricated reinforced concrete column and a prestressed steel reinforced concrete beam, and the prefabricated reinforced concrete column is connected with the prestressed steel reinforced concrete beam through the overhanging short beam on the prefabricated reinforced concrete column; and the prestressed steel reinforced concrete beam is clamped on the flange clamping sleeve at the end part of the overhanging short beam through the flange plate at the end part.

A modular decking system comprising at least one extendable joist, at least two extendable beams each connected to the at least one extendable joist, and at least one extendable bearer supporting the at least one extendable joist and the at least two extendable beams. The at least one extendable bearer is connected to the at least one extendable joist. Each extendable joist, each extendable beam, and each extendable bearer are extendable and retractable relative to one another.