3284results about "Columns" patented technology

The present invention relates to the technical field of fabricated buildings. Disclosed is a fabricated steel structure residence system. The fabricated steel structure residence system of the present invention comprises a frame portion and a shear wall portion, wherein the frame portion comprises a special-shaped column, a steel beam and a floor system; and the special-shaped column comprises a steel pipe and a plurality of T-shaped steels arranged along a peripheral wall of the steel pipe. A combined T-O section form of the special-shaped column provided by the present invention can realize relative separation of a pressure from bending on a combined section, such that the fabricated steel structure residence system has good bending bearing capacity and rigidity. The characteristic of an outer T-shaped steel is used such that a full-bolt connection form can be used between the steel beam and the special-shaped column. Moreover, a reinforcement member is provided at a beam-column joint, such that the rigidity and strength of the joint region are improved. In addition, specific structures of a floor system and a shear wall are further optimized, and a corresponding joint connection method is provided, such that the fabricated steel structure residence system that can be quickly assembled and is stable in terms of connection is formed.

The utility model relates to a vertical connection node structure of a partially coated steel-concrete combination column, which is characterized in that a horizontal partition plate is preset at the bottom of an upper column, the horizontal partition plate is welded with the column in a factory, an upper column web plate can be reserved or cut off in a connection area, and a longitudinal steel bar and a vertical stiffening plate are welded on two sides of the horizontal partition plate of the upper column; it is guaranteed that the centers of the vertical stiffening plates and the centers of the longitudinal steel bars are aligned or deviated within a controllable range; when the upper column and the lower column are spliced on the construction site, only the flanges of the upper column and the lower column need to be welded in a butt joint mode, and the vertical stiffening plate of the upper column and the top partition plate of the lower column are welded. The thickness of the horizontal partition plate and the thickness of the vertical stiffening plate are designed and calculated, the reliability of force transmission of the horizontal partition plate and the thickness of the vertical stiffening plate are verified, and two connecting structures of a grouting-free joint and a grouting formwork-free joint can be achieved. Compared with the prior art, on-site construction procedures can be reduced, and construction efficiency can be improved.

The utility model discloses a heat-preservation and energy-saving building column foundation heat-preservation joint which comprises an embedded part, a steel column and a high-strength heat-preservation cushion block. The embedded part comprises a positioning plate and a column foot anchor bolt and is embedded in the positioning plate when a reinforced concrete structural plate is poured, a higher part of the column foot anchor bolt is exposed according to the elevation of a steel column foot bottom plate, a high-strength heat preservation cushion block is arranged on the upper portion of the positioning plate, a hole is reserved in the position, corresponding to the column foot anchor bolt, of the high-strength heat preservation cushion block, and the column foot anchor bolt penetrates through the hole. A steel column base bottom plate penetrates through a column base anchor bolt to fall on the high-strength heat preservation cushion block and is firmly connected with the column base anchor bolt through a nut, a steel cover plate is arranged on the periphery of the steel column, the steel cover plate and the ground surface layer are located on the same horizontal plane, and the space between the steel cover plate and the steel column base bottom plate is filled with foaming polyurethane. On the premise that the structure bearing requirement is met, cold (heat) breaking is conducted on the column foundation part, a heat preservation surface layer does not need to be additionally adopted to wrap a building inner structure column (steel column), the size of the built building inner structure column is appropriate, and building space does not need to be additionally occupied.

An outdoor louvered tent includes a louvered tent roof and a louvered tent frame for mounting the louvered tent roof. The louvered tent frame includes stand columns and a ring beam, the louvered tent roof includes several louver plates, linkage strips for linkage cooperation with several louver plates, and an overturning driving device for driving the linkage strips to move. The overturning driving device includes a linkage assembly and a driving assembly, and the driving assembly includes a control member and a mounting seat. The driving assembly is mounted on any stand column, and a stroke cavity groove for the control member to move up and down is provided in the mounting seat.

A frame truss made of two walls and a roof structure. Each of the two walls have an outer and inner chord. The outer and inner chords of each respective wall are not parallel, but the inner chords of the two walls are parallel to each other. The arrangement of the inner and outer chords of each wall creates an exterior overhang with respect to the ground. Each of the walls converge at their bases and are attached at their bases to a plate. The roof structure attaches to the top of each of the walls and spans between them creating a frame that can be assembled in conjunction with similar frames to construct a building system.

The reinforcing structure comprises formworks defining a column body pouring space, profile steel is arranged in the formworks, the reinforcing structure further comprises a plurality of bases surrounding the outer sides of the formworks, baffles are supported on the inner sides of the bases, the baffles are arranged at the gap between the upper formwork and the lower formwork in a blocking mode, the bases are connected with pulling and connecting assemblies, and the pulling and connecting assemblies are arranged on the outer sides of the bases. The tie assembly penetrates through the baffle and a gap between the upper formwork and the lower formwork to be connected with the profile steel, and every two adjacent bases are connected through a connecting assembly. The construction method has the beneficial effects that the internal profile steel is used as an anchoring point, the baffle is tied on the outer side of the formwork, slurry plugging at the position can be achieved, the formwork at the position can be reinforced, and follow-up construction deformation is avoided; the size of the tie and the size of the connecting assembly can be flexibly adjusted, so that the whole structure can meet construction requirements of columns of different shapes and specifications, and the application scene is expanded; the formwork is additionally reinforced through the cross beams which are supported mutually and internally, the overall stability of the formwork is further improved, and the formwork is flexible, adjustable and convenient to turn over.

Provided in the present invention are a prefabricated shear wall and a building room module including same. The prefabricated shear wall comprises a lightweight formwork assembly, a steel skeleton and embedded columns, wherein the steel skeleton comprises a plurality of horizontal connecting members arranged in parallel in the direction of the height of the prefabricated shear wall and a plurality of vertical reinforcing bars penetrating the horizontal connecting members, the horizontal connecting members being configured to provide the stiffness for the building room module when the prefabricated shear wall serves as a wall structure of the building room module. For the prefabricated shear wall and the building room module including same provided in the embodiments of the present invention, using the lightweight formwork assembly can greatly reduce the amount of steel used and the weight of the shear wall, thereby avoiding corrosion prevention and electron shielding problems. Moreover, because the horizontal connecting members and the vertical reinforcing bars are used in the steel skeleton, the problem of a traditional reinforcement cage skeleton structure being difficult to connect to a lightweight formwork assembly and embedded columns is solved; and when the prefabricated shear wall serves as a prefabricated part of a wall structure of the building room module, the horizontal connecting members can provide enough stiffness for the building room module after concrete pouring.

The utility model discloses an assembly type steel column butt joint auxiliary connecting piece which is used for assisting hoisting alignment of a lower steel column and an upper steel column and comprises a connecting piece body, an upper steel column and a lower steel column, and the connecting piece body is an L-shaped steel plate attached to the inner wall of the lower steel column and the inner wall of the upper steel column; connecting bolt holes are formed in the lower steel column and the upper steel column; and the connecting piece comprises a guide section and a connecting section which are distributed up and down. According to the utility model, the connecting section of the connecting piece can be arranged in the lower steel column, the connecting bolt hole corresponds to the locking bolt hole, the connecting bolt hole and the locking bolt hole are fixed through the fixing bolt, then the upper steel column is transported to the position above the lower steel column through hoisting equipment, then the upper steel column is descended, and the upper steel column is connected with the guide section of the connecting piece; the guide section is used for guiding the hoisting alignment process and assisting rapid connection of the upper steel column and the lower steel column, then the connecting piece and the upper steel column are connected through the fixing bolt, the purpose of rapidly completing hoisting butt joint of the upper steel column and the lower steel column is achieved, and construction is rapid and convenient.

The invention relates to the technical field of building construction, in particular to a tubular column foot pre-embedding positioning method and device. The method comprises the steps of obtaining a steel structure construction drawing; constructing a tubular column and embedded foundation bolt construction model according to a steel structure construction drawing; according to the construction model, a positioning relation between the embedded foundation bolts and the vertical main reinforcements is established; construction model collision analysis and a three-dimensional simulation experiment are carried out based on the positioning relation of the embedded foundation bolts and the concrete main reinforcements; and processing and mounting the steel structure device based on the construction model. By optimizing construction nodes, the engineering quality is improved, the problem that the embedded steel plate cannot be reused is solved, the vertical column rib and foundation bolt embedded steel plate grinding tool is controlled to freely stretch out and draw back to control the position of the reinforcing steel bar, the effect of reusing different column diameters is achieved, the construction efficiency is improved, the progress is accelerated, and the construction cost is reduced. And the method has good economic and social benefits.

Crown beam (100a, 100b, 100c, 100d) for a roof construction comprising a crown beam profile (10) and a gutter profile (110a, 110a'), for instance a gutter profile for collecting precipitation or a gutter profile for receiving conduits, wherein the crown beam profile (10) has an upper wall (11), a front wall (12) against which rafter profiles are for instance fixable, a rear wall (13) and a lower wall (14), wherein the crown beam profile (10) is provided with an elongate cavity (16) in which a screen roller (200) or a carrier profile (300) is receivable, wherein the lower wall is configured to be coupled to the gutter profile (110a, 110a'), wherein the gutter profile can be fixed pivotally to the lower wall and an intermediate profile (120) can be mounted removably between a bottom (114) of the gutter profile and the lower wall of the crown beam profile.

The invention discloses a circular wooden column-hole-hidden graphite hardwood-graphite layer-along-column foundation stone seismic isolation system which is mainly used for seismic isolation and self-resetting of the bottom of a wooden structure circular wooden column. The shock insulation system is composed of a round wooden column, hole-hidden graphite hardwood, concave spherical surface belt limiting edge column foundation stone, a graphite layer and an annular tempered glass sealing plate. The hole-hidden graphite hardwood is composed of a convex spherical section, a thick cylindrical section, a graphite-hidden hole and a thin cylindrical connecting key which are integrally processed, and the thin cylindrical connecting key is inserted into the round hole in the bottom of the round wooden column to achieve positioning butt joint. The graphite layer can reduce the friction force between the convex spherical surface of the hole-hidden graphite hardwood and the concave spherical surface of the column foundation stone. The concave spherical surface of the column foundation stone enables the round wooden column to reset automatically after an earthquake, and the limiting edge of the column foundation stone can limit excessive displacement of the bottom of the round wooden column in the vibration process. And the annular toughened glass sealing plate can be sealed and waterproof. The seismic isolation system has the advantages of reducing the seismic action of an upper structure through bottom seismic isolation of the circular wooden columns and achieving structural toughness seismic resistance through self-resetting after an earthquake.

The invention relates to the field of steel member engineering, in particular to a prestressed concrete combined double-chamber box-section bent steel member and a manufacturing method thereof, and the manufacturing method comprises the following steps: S1, welding an inner box chamber and forming an assembly hole; s2, first bolts and second bolts are inserted into the assembly holes; s3, first bolts and second bolts are initially screwed to apply inward prestress to the two webs and the two flange plates, and the side wall of the inner box chamber is made to generate inward concave elastic pre-deformation; s4, welding the outer box chamber and the reinforcing plate; s5, an expansion material is injected into a cavity of the inner box chamber; s6, the expansion material expands to enable deformation of a web plate and a flange plate of the inner box chamber to be reset to the design form; and S7, finally screwing the bolt and stabilizing the pressure. The circumferential confining pressure state of the expansion material is achieved through the prestress bolt system, the compressive strength of the expansion material is multiplied, and therefore the axial compression buckling ultimate load, the compressive bearing capacity and the stability of the bending component are greatly improved.

The utility model provides a leading-in device of an assembly type steel column foundation, which relates to the technical field of buildings and comprises a steel column mechanism, and a foundation mechanism is arranged below the steel column mechanism. In the utility model, when the steel column mechanism and the foundation mechanism are assembled and butted, along with the slow descending of the positioning plate, the guide head with the thinner bottom end can be easily inserted into the guide groove at the top of the concrete foundation, and the gradually thickened part can be gradually contacted with the inner wall of the guide groove, so that certain guide and self-adjustment effects are provided for the guide column; even if slight deviation exists during initial insertion, the thicker part is limited and guided by the groove wall of the guide groove along with the increase of the insertion depth of the guide head, so that the deviation is automatically corrected, and the square guide column can be smoothly inserted into the guide groove in the top of the concrete foundation; at the moment, the mounting holes in the surface of the positioning plate are just penetrated by corresponding steel bars, excessive adjustment is not needed, operation is convenient, and the assembling efficiency is effectively improved.

The utility model discloses a garden landscape pavilion, which relates to the technical field of gardens, and comprises a pavilion seat, the upper surface of the pavilion seat is fixedly connected with four pavilion columns, a pavilion top, a protection mechanism and two seat plates are arranged above the pavilion seat, the pavilion top and the seat plates are fixedly connected with the pavilion columns, the protection mechanism comprises two servo motors fixedly connected with the pavilion columns, and the servo motors are fixedly connected with the pavilion columns. The output shaft ends of the two servo motors are fixedly connected with protection assemblies rotationally connected with the pavilion columns. According to the landscape pavilion, the pavilion base, the pavilion columns, the pavilion top and the protection mechanism are arranged in a matched mode, when tourists play in a garden and encounter rainy days, rainwater can be shielded through the extensible protection assembly, the rainwater is prevented from floating into the landscape pavilion, and therefore the tourists leaning on the pavilion columns in the landscape pavilion are prevented from being affected; and meanwhile, the protection assembly can be limited, the possibility that the protection assembly is blown and shaken is reduced, and therefore the rain and wind shielding effect of the garden landscape pavilion is guaranteed, and the playing comfort of tourists is improved.

The invention relates to a prefabricated steel concrete beam, a prefabricated steel concrete combined beam column and a production method thereof, the prefabricated steel concrete beam comprises a prefabricated U-shaped beam frame body, a U-shaped groove formed by a bottom steel plate and webs on two sides, a beam shell with a cavity formed in the middle and a pouring opening formed in the upper part, and at least one connecting part is arranged between the webs on the two sides; the upper reinforcing profile steel is arranged on the upper end face of the side web and at least covers the upper end face and the outer side face of the side web; the lower reinforced profile steel is arranged on the lower end face of the side web and at least covers the lower end face and the inner side face of the side web; the reinforced connecting section steel is arranged at the upper part of the pouring opening of the beam shell at intervals and is welded between the upper reinforced section steel; the beam end connecting steel plate is arranged on the bottom steel plate, the bottom of the connecting plate is connected with the bottom steel plate, the connecting plate is perpendicular to the bottom steel plate, and the beam end connecting steel plate partially extends out of the outer end of the bottom steel plate, partially extends into the bottom steel plate and is used for being connected with external beams and columns. The device can be assembled and transported on a production line, and is reliable in quality, high in efficiency and low in cost.

The invention relates to the field of buildings, in particular to an externally-reinforced concrete-filled steel tube column and a peak bearing capacity calculation method, and the externally-reinforced concrete-filled steel tube column comprises a steel tube and core concrete located in the steel tube; a UHPC layer is poured on the outer ring of the steel pipe, the section of the outer ring of the UHPC layer is square, and the center line of the UHPC layer coincides with the axis of the steel pipe. Stirrups located on the outer ring of the steel pipe are embedded in the UHPC layer, and longitudinal steel bars are arranged on the inner ring of the stirrups in the vertical direction. The invention provides an external reinforcement type concrete filled steel tubular column. The method can reinforce the concrete filled steel tube with the annular void area, so that the actual bearing capacity of the concrete filled steel tube exceeds the original design value level. The invention further provides a method for calculating the peak bearing capacity of the externally-reinforced concrete-filled steel tube column, the peak bearing capacity of the reinforced concrete-filled steel tube can be quantitatively evaluated, and a theoretical basis is provided for subsequent use and maintenance of the concrete-filled steel tube.

The utility model discloses a BIM-based assembly prefabricated structure positioning processing device, which relates to the technical field of assembled building construction. The utility model includes: a counterweight chassis, a positioning support assembly, a low-position support member, a lifting and rotating member, a marking positioning member, a positioning plate and other structural components. The utility model uses the positioning plate to initialize the insertion and positioning of the protruding steel bars of the column crane base whose position has been fixed, and then lifts the lifting and rotating member and the positioning plate to perform "high-position" insertion and coordination with the assembled column crane above. At the same time, the marking positioning member is used to perform position positioning coordination with the assembled column crane, and the column crane alignment mark is marked. When the assembled column crane descends and approaches the column crane base, the positioning plate is separated by a secondary rotation, and the pre-adjusted marking positioning member is used to perform real-time dynamic coordination with the column crane alignment mark on the side of the assembled column crane, thereby safely and accurately completing the assembly of the assembled column crane and the column crane base.

A reinforced joint of a crossed concrete filled steel tubular column for a cooling tower convenient to construct comprises four steel supporting columns, a radial reinforcing plate and an annular reinforcing plate, the four steel supporting columns are welded to form the crossed steel tubular joint of an X-shaped structure, and the radial reinforcing plate and the annular reinforcing plate are welded in the crossed steel tubular joint. The four steel supporting columns and the positions of the reinforced joints are all filled with concrete. Compared with the prior art, the reinforcing joint has the following advantages: (1) the reinforcing joint is not provided with a stiffening rib inside the steel pipe, so that the condition that a plurality of welding seams are mutually crossed is avoided, the construction process is simplified, and the manufacturing is simple; meanwhile, the reinforcing part is not exposed outside the component, and the appearance is attractive. And (2) the reinforced node can be designed based on the principle of'strong node and weak component ', the annular reinforcing plate and the radial reinforcing plate respectively improve the in-plane and out-plane rigidity of the crossed steel tube concrete, and also improve the steel content of the section, so that the bearing capacity of the node is improved, and the node is safer and more reliable.

The utility model provides a square steel tube concrete combination column internally filled with stones. The square steel tube concrete combination column comprises a square steel tube, a concrete layer and a column core group, the column core group is coaxially arranged in the square steel tube, and the concrete layer is filled in the spare part in the square steel tube; the column core group comprises angle steel, a stone column, a batten plate group and a limiting assembly, the positioning mechanism is used for positioning the array position of the four angle steel, the integrity and the position of the column core column are ensured, the combined column can remarkably improve the axial pressure bearing capacity and the integrity, and the combined column has the advantages of being high in compressive strength, low in manufacturing cost and the like; according to the construction method, local materials are used according to the building characteristics of the Fujian area, waste stone in demolished stone structure buildings is fully utilized in the concrete-filled steel tube combination column structure, the problems of insufficient axial compression strength and bearing capacity of the concrete-filled steel tube combination column structure can be solved, the concrete consumption of a newly-built structure can be greatly reduced, and the construction cost is reduced. The method for reducing the cost and reducing the environmental pollution is a technology which is suitable for the green and sustainable development demand of the society.

The invention discloses a connecting structure and a connecting method of an adjustable prefabricated reinforced concrete beam column, a straight thread reverse thread sleeve is directly pre-buried in the prefabricated reinforced concrete beam during factory prefabrication, and no steel bar is exposed at the beam end. The pre-embedded sleeve is reserved on the prefabricated reinforced concrete column, correction of horizontal and vertical installation deviation in the installation process is facilitated, correction of installation deviation in the beam-column connection axis direction is guaranteed through the adjustable connecting piece, and connection length deviation, horizontal deviation and vertical deviation at the joint can be adjusted within a certain range. After a plurality of in-beam longitudinal bars are anchored through the end plates, the in-beam longitudinal bars are converted into a small number of pre-buried straight-thread reverse-thread sleeves, the number of connecting pieces is greatly reduced, and the workload and difficulty of site prefabrication, installation, construction and alignment are remarkably reduced.

The utility model provides a steel bar bundling and positioning device, which relates to the field of building construction and comprises a knob and a positioning frame. The rotary button is rotationally connected with the connecting frame; the connecting frame is nested on the outer side surface of the frame rod; the positioning frame comprises a clamping rib, an adjusting sleeve, an adjusting knob, a threaded rod, a sliding sleeve, a clamping ring, a clamping plate and a clamping nut; the adjusting knob is welded and connected to the unthreaded surface of the outer side of the threaded rod; the clamping plate is in welded connection with the sliding sleeve; the rear end of the clamping rib is welded to the front side face of the adjusting sleeve. The sliding sleeve is slidably connected to the outer side face of the frame rod. The clamping ring is screwed with the clamping nut through threads; a forward thread end and a reverse thread are arranged on the outer side surface of the threaded rod; through the arrangement of the threaded rod, the adjusting sleeve, the U-shaped clamping ring, the clamping plate, the rotating button and the frame rod, the positioning and bundling universality of the column bar positioning frame is improved, and the problem that the positioning and bundling universality of column bars is poor due to the fact that a positioning structure of a traditional column bar positioning frame is rigid and fixed is solved.

The invention provides a fiber web positioning and reinforcing method for a concrete-filled steel tubular column, and relates to the technical field of concrete-filled steel tubular columns. The fiber net positioning and reinforcing method for the concrete filled steel tubular column comprises the following specific steps that S1, firstly, a steel tube shell is vertically and fixedly installed at the construction position, and then a fiber net and a prefabricated stone column are sequentially hoisted into the steel tube shell through a crane; and S2, then a first inserting plate is inserted into a first inserting groove, a second inserting plate is inserted into a second inserting groove, and at the moment, the fiber net and the prefabricated stone column are positioned and fixed under the action of a first positioning assembly and a second positioning assembly. The multiple first positioning assemblies are arranged on the steel pipe shell, and the multiple second positioning assemblies are arranged on the prefabricated stone column, so that the position of the internal fiber net can be fixed, the fiber net is limited and supported, and the situation that the position of the fiber net is changed in the concrete injection process is effectively avoided.

According to the diffusion type six-degree-of-freedom pose estimation-based steel column bottom plate prizing-free downward insertion method, the performability problem of one-time prizing-free downward insertion of a steel column bottom plate under the condition that a porous array is in a limited space and disturbed is solved, a task window is established under a unified construction coordinate system, and bolt axes and hole centers are collected and registered according to array topology; predictive interference is eliminated through diffusion type six-degree-of-freedom pose estimation with insertion constraint preposed, an allowable insertion pose range tightened along with the height is generated according to clearance and safety margin, and a downward insertion channel and an insertion constraint set are constructed in a communicating mode; tubular model predictive control is established in a feasible region, bounded disturbance of wind disturbance and swing is considered, a nominal trajectory and a segmented speed limit value of a channel center are formed, input shaping swing suppression and online monitoring are implemented, and withdrawing and rapid regeneration control are performed along a channel when necessary; the method is used for installation of simultaneous sleeving of multiple holes in the steel column bottom plate, and has the beneficial effects that the minimum clearance is kept not lower than the safety margin, lateral contact and prying are avoided, and the forbidden area is not touched under the limited space and disturbance.

The utility model relates to a prefabricated section steel UHPC-NC combination column which comprises ultra-high performance concrete, common concrete, H-shaped steel, longitudinal bars, stirrups and studs. The section steel concrete column is provided with an ultra-high performance concrete rectangular-ambulatory-plane column and a common concrete square column embedded with the H-shaped steel. The end part of the H-shaped steel is provided with a hook-shaped component, the middle part of a web plate is provided with a plurality of rows of holes and flanges, the web plate is welded with a plurality of rows of studs, and the common concrete square column is wrapped by an ultra-high performance concrete hollow square column which is internally provided with longitudinal bars and closed stirrups. Compared with the prior art, the structure is simple in construction, convenient to machine and construct, reasonable in design division, capable of fully utilizing resources, good in economic reliability, good in stress performance, large in rigidity and good in ductility, the problems of anti-seismic performance, stability and the like can be solved, and in addition, the fluidity of the internal structure is improved through the circular or regular polygon holes.

The utility model provides a concrete filled steel tube flat cylindrical surface outer beam reinforcing node, the outer contour of the section of a concrete filled steel tube flat column is rectangular, a longitudinal insertion plate is arranged between the middle parts of short edges in the column along the full height, and brackets are arranged at the rear part of a left outer cylindrical surface and the front part of a right outer cylindrical surface according to the same structural form; transverse reinforcing plates are respectively arranged in the left area and the right area corresponding to the joint with the bracket; sealing plates and transverse stiffening ribs are arranged on the portions, on the two sides of a bracket connecting web plate, of the end, connected with the concrete-filled steel tube flat column, of the bracket according to the same structural form, and haunched upper flange plates and underarm flange plates are welded to the portions, between the sealing plates and the outer cylindrical surface of the concrete-filled steel tube flat column, of the upper end of a bracket upper flange and the lower end of a bracket lower flange respectively. The haunching upper flange plate and the haunching underarm flange plate are vertically symmetrical, and plate bodies are inclined and are as wide as the bracket. The utility model solves the problem of column exposure of a high-rise steel structure building structure and the problem of insufficient out-of-plane connection rigidity of a flat column system, and is convenient to construct.

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 an anti-impact and anti-seismic assembly type column with a protection device, and relates to the technical field of building body stand column anti-collision, the anti-impact and anti-seismic assembly type column comprises a foundation bottom plate, an annular bearing body, an anti-seismic plate, an anti-impact module I, an anti-impact module II and a concrete square column with a reinforcement cage, the foundation bottom plate sleeves the outer side of the concrete square column; the annular bearing body is located above the foundation bottom plate and fixed to the outer side wall of the concrete square column. The annular bearing body comprises four pre-buried plates and right-angle connecting assemblies, the four pre-buried plates are vertically arranged on the four side walls of the concrete square column respectively, and any two adjacent pre-buried plates are fixedly connected through the right-angle connecting assemblies. The number of the first anti-impact modules is four, the first anti-impact modules are arranged on the outer sides of the four embedded plates through the anti-seismic plates correspondingly, and the corresponding ends of every two adjacent first anti-impact modules are fixedly connected through the second anti-impact modules. Modularized assembly is adopted, replacement and repair are easy, the corrugated steel plate and the POZD elastomer material are combined, and the anti-seismic and anti-impact capacity is improved.

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 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.