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U-shaped recycled concrete composite beam, and design and construction method therefor
PCT designated stage expiredWO2025103288A1Solid waste managementGirdersHigh strength concreteConcrete beams
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.
Owner:TONGJI UNIV
Restrained joint apparatus, uses of, and methods for making, the same
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.
Owner:OLSON NORMAN L
Two-span continuous stiff overhanging large-span roof structure adopting direct tensioning technology
Owner:CHINA ARCHITECTURE DESIGN & RES GRP CO LTD
Beam-slab integrated prefabricated waffle slab structure and construction method thereof
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.
Owner:FUJIAN CONSTRUCTION ENGINEERING PREFABRICATED BUILDING RESEARCH INSTITUTE CO LTD
Cast-in-place beam steel bar truss floor support plate installation construction quality control method and system based on BIM and VR
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.
Owner:CHINA CONSTR FIRST BUILDING (GRP) CORP LTD
Reinforcing beam reinforced by adopting retired wind power blade and method for determining bending rigidity of reinforcing beam
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.
Owner:ROAD & BRIDGE INT CO LTD
Stiffening rib structure capable of preventing local buckling and design method
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.
Owner:BEIJING INST OF ARCHITECTURAL DESIGN
Segmented butt joint construction structure of large-span steel beam
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.
Owner:SHENZHEN MUNICIPAL ENG CORP
Tension-shear integrated assembly type frame structure beam column connecting joint and construction method thereof
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.
Owner:宝业集团浙江建设产业研究院有限公司
Double-beam and shear wall connecting structure in modular building and construction technology
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.
Owner:GUANGDONG JIANKE ARCHITECTURE DESIGN INST +1
A construction method for large-volume high-support prestressed concrete beams
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.
Owner:CHINA TIESIJU CIVIL ENGINEERING GROUP CO LTD +1
Precast concrete beam dry-type connection node
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.
Owner:SHANGHAI TANDD TECHNOLOGY CO LTD
Hemp-based structural composites and methods of making hemp-based structural composites
Owner:FIALA JR THEODORE JAMES
Adjustable steel structure splicing platform
ActiveCN120734638AWelding/cutting auxillary devicesAuxillary welding devicesClassical mechanicsMechanical engineering
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.
Owner:WANDERKAI CONSTR GRP CO LTD
Horizontal member and architectural structure
ActiveJP2025092187ANon-rotating vibration suppressionGirdersClassical mechanicsStructural engineering
Owner:SEKISUI HOUSE KK
Positioning and mounting device for steel beam mounting
Owner:NO 5 ENGINEERING COMPANY LTD OF CCCC FIRST HARBOR ENGINEERING COMPANY LTD +1
Corrosion-resistant large-span prefabricated double-T plate and connecting structure thereof
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.
Owner:HUATAI SPECIAL TYPE CONCRETE PROD CO LTD
High-strength steel combined multi-chamber box-shaped section bent steel member and manufacturing method
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.
Owner:SICHUAN PROVINCIAL ARCHITECTURAL DESIGN & RES INST
Quickly-installed elevator steel structure body and manufacturing and assembling method thereof
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.
Owner:YUNNAN ZHONGTI ELECTRICAL EQUIPMENT CO LTD
Modular building panels with building services
Modular panels with custom metal frame members having cutouts to accommodate building services. These modular panels are open for visual inspection and can be used in various construction applications such as floors and walls. The cutouts in the metal frame members allow for the routing of building services such as plumbing, wiring, fire sprinkler, HVAC, whether rigid or flexible. The modular construction process involves the placement of module panels at a build site and the joining of building services between adjacent panels. Additionally, the system may incorporate a building information modeling (BIM) system that generates electronic models of buildings with modules and corresponding framing components.
Owner:2837929 ONTARIO LTD
3D printing concrete beam with embedded intelligent mortar rod
The utility model provides a 3D printing concrete beam with an embedded intelligent mortar rod, which relates to the technical field of constructional engineering and comprises a 3D printing concrete beam, at least two reinforcing steel bars are embedded in the 3D printing concrete beam, and at least one intelligent mortar rod is further embedded between the two reinforcing steel bars in the 3D printing concrete beam. The shape, structure and size of the intelligent mortar rod are consistent with those of the steel bar; at least one electrode is fixed on the intelligent mortar rod, and an external wire is connected to the electrode so as to measure the resistance change rate of the intelligent mortar rod; the concrete crack monitoring device can effectively monitor the concrete crack at the reinforcing steel bar of the 3D printing concrete beam.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Box beam adjustable support systems
An adjustable roof support system is disclosed for supporting a roof or a floor in a building having at least one truss. The system includes a plurality of interlocking segments, each having at least one fastener slot and a cross-section comprising a main rail with a top extension and a bottom extension that define an interior channel and an external periphery. The interlocking segments include at least one female length and one male length, wherein the exterior periphery of the male length fits within the interior channel of the female length. The assembled length is slidably adjustable, and the system can be assembled on a structure having a first truss and a second truss. The system may also include a cross connector configured to secure one interlocking length to another at an angle.
Owner:SIMPSON STRONG TIE
Reconfigurable metamaterial
A reconfigurable metamaterial formed of an assembly of building blocks including first rigid members hingedly engaged together at a first hinge, and second rigid members hingedly engaged together at a second hinge. The first rigid members are hingedly connected to respective ones of the second rigid members at third and fourth hinges. The third and fourth hinges are offset from the first and second hinges. A first elastic member is engaged to the first rigid members and biases them away from one another. A second elastic member is engaged to the second rigid members and biases them away from one another. The assembly has a deactivated configuration, wherein the third and fourth hinges are spaced apart, and an activated configuration, wherein the third hinge merges into the fourth hinge to create a contact-induced metahinge about which the first rigid members pivots relative to the second rigid members.
Owner:MCGILL UNIV
3D printing concrete truss girder structure based on three-dimensional steel bar reinforcement and construction method
According to the 3D printing concrete truss girder structure based on three-dimensional steel bar reinforcement and the construction method, through space welding connection of the three-dimensional conical steel bars and the top plane steel bars, the interlayer bonding performance and the overall stress performance of a 3D printing concrete truss girder are remarkably improved. The three-dimensional conical steel bars comprise plane steel bars matched with the truss girder in length and width and a plurality of three-dimensional conical steel bar units, the three-dimensional conical steel bar units are arranged in the mode that the height of a three-dimensional space component formed by bending metal steel bars crosses over at least one or more concrete printing layers, and the plane steel bars are buried in the lower layer concrete. And the upper ends of the three-dimensional conical steel bar units are fixedly connected with the top vertical rod section steel bars of the top plane steel bars on the upper layer or the higher layer or the vertical bars of the next plane steel bars, so that an integral space steel bar framework is formed. The steel plate has higher shear bearing capacity, better ductility and a better failure mode, and is suitable for load-bearing components in various building and bridge engineering.
Owner:HEBEI UNIV OF TECH
Automatic control system of portal crane
The invention relates to the technical field of cranes, in particular to an automatic control system of a portal crane, which comprises an identification module, a parameter adjustment module and an execution module which are in signal connection in sequence, the identification module comprises a camera and an image processing unit, the camera is arranged on a lifting appliance of the portal crane, and the image processing unit is arranged on the portal crane. The camera synchronously ascends and descends along with ascending and descending of the lifting appliance, the image processing unit performs feature extraction and comparison on shot images, if the images are identified as concrete beams, the parameter adjusting module adjusts the lifting parameters to be first preset parameters, and if the images are identified as steel beams, the parameter adjusting module adjusts the lifting parameters to be second preset parameters; according to the gantry crane, the identification module can accurately identify whether a hoisting object is a concrete beam or a steel beam in real time, and the operation parameters and the motion logic of the gantry crane are optimized according to the identification result, so that the safety and the efficiency are both considered.
Owner:POLY CHANGDA ENGINEERING CO LTD
Anti-shaking double-channel steel joist structure
The utility model discloses an anti-shake double-channel steel joist structure, which comprises a horizontally arranged support beam, the support beam comprises two channel steels of which webs are vertically arranged and openings are opposite, and opposite semicircular grooves are correspondingly formed in flanges on the upper and lower sides of the two channel steels; opposite first connecting holes are formed in the positions, corresponding to the two sides of the semicircular groove, of webs of the two steel channels. A dragging and supporting lead screw is vertically arranged between the semicircular grooves of the two steel channels, a disc adjusting nut is installed on the dragging and supporting lead screw in a threaded fit mode, and the disc adjusting nut abuts against the upper side of the supporting beam. Lead screw fastening bolts are arranged in the first connecting holes in a penetrating mode, under the fastening effect of the lead screw fastening bolts, the flanges of the two pieces of channel steel can be close to each other, and the groove walls of the semicircular grooves of the two pieces of channel steel are tightly attached to the dragging and supporting lead screw. The supporting structure is simple in structure and convenient to construct, and has good supporting stability and safety.
Owner:渝建建筑工业科技集团有限公司
Double-slope multi-section cable string truss structure system
The utility model relates to a double-slope multi-section cable string truss structure system, belongs to the technical field of building structures, and solves the problem that in the prior art, a large-span truss structure occupies a large space in the longitudinal direction, so that the clearance height is too low. The device comprises a cable string truss structure and a supporting structure, the cable string truss structure comprises multiple rows of space truss structures arranged in parallel, side cables, middle cables and truss connecting pipes connected among the multiple rows of space truss structures. The lower portion of the space truss structure is fixedly connected with side cables and middle cables, and the middle cables and the side cables are arranged in a staggered mode. The side cables and the space truss structure are supported through a plurality of side cable supporting rods. The middle cable and the space truss structure are supported through a middle cable supporting rod. The double-slope multi-section cable string truss structure system has the effect that the indoor clearance height of a supporting system is increased on the premise that large-span supporting is achieved.
Owner:CHINA ARCHITECTURE DESIGN & RES GRP CO LTD
Space curve prestress composite beam column and design method thereof
The invention relates to a space curve prestress composite beam column and a design method thereof. The bottom of the space curve composite beam column is vertically upward, the tail end overhanging part is approximately horizontal, and the middle part is connected with the horizontal prestressed concrete closed beam to form a space structure. The horizontal closed prestressed beam and the space curve composite beam column support each other, the constraint boundary condition of the space curve composite beam column is changed, and the internal force distribution and magnitude of the space curve composite beam column are changed. According to the space curve composite beam column with the horizontal closed prestressed beam, the anti-cracking and anti-bending performance of a component is improved, and the deformation performance of the component is also improved. Therefore, the structure is particularly suitable for large cantilever structures with high deformation and bearing capacity.
Owner:SHANGHAI TONGJI CONSTR ENG DESIGN CO LTD +1
Composite beam capable of enhancing ultimate strength of ultimate concrete structure
The invention discloses a composite beam capable of enhancing the ultimate strength of an ultimate concrete structure. The span of the beam is measured, a bending moment graph of the beam is drawn, according to analysis of the bending moment graph, UHPC is selected for a pure bending section (the middle of the span) above a neutral axis of the beam, the upper half part of the beam is covered, and common concrete is used for the rest parts; half of the beam height is selected to use UHPC on the upper portion, and the structural ultimate strength of the composite beam can be improved; the FRP rib is used on the lower portion of the beam, the tensile property and ductility of the lower portion can be improved, a sleeve grouting anchorage device (the inner wall of a metal sleeve is provided with threads) and a wedge-shaped anchorage device (the clamping section is wrapped with a copper sleeve) are adopted, the anchoring reliability is ensured through the double effects of chemical bonding and mechanical meshing, and due to the fact that the FRP rib can be subjected to brittle failure and is preset to be in a super rib failure mode, the tensile strength and ductility of the lower portion can be improved. The problem of brittle failure of the FRP rib is solved. The beam is simple in design, convenient to construct, reasonable in stress, high in structural ultimate strength, high in reliability, wide in application range and material-saving.
Owner:ZHEJIANG UNIV OF TECH +1
Three-way pre-tightening steel wire tension beam structure
The utility model belongs to the technical field of tension beam structures, and particularly relates to a three-way pre-tightening steel wire tension beam structure. A three-way pre-tightening steel wire tension beam structure comprises a cross beam, a steel wire and a pre-tightening assembly, the pre-tightening assembly is installed on the cross beam, a steel wire groove is formed in the cross beam, and the steel wire is installed in the steel wire groove through the pre-tightening assembly; the utility model provides a three-way pre-tightening steel wire tension beam structure, and aims to solve the problem of balance between the bearing capacity and the self weight of a cross beam in a tension beam structure in the prior art.
Owner:GUANGZHOU HORIZON PRINTING CO LTD