888 results about "Reinforced concrete column" patented technology

A novel method for rapidly assembling a low-cost energy-saving house with precast columns, beams and slabs comprises the steps of preparing house columns, beam molds and built-in reinforcing steel bars or profiled steel bars, pouring concrete grout into the molds, high-speed rotating in a centrifuge, curing, and demolding to obtain precast reinforced concrete columns and beam components; and inserting the precast columns on a cup foundation element, passing the precast beams through the preformed pores on the precast column, lapping precast floor slabs on the precast beams, and embedding wall slabs inside the embedding grooves of the precast beams, so as to form the major structure of the rapidly assembled low-cost energy-saving house. The inventive method has the advantages of application to industrial production, no air holes in components, high density, high strength, long service life, standardized production, low production cost, low time and raw materials consumption, rapid house construction speed, and high quality; and is a novel energy-saving house construction method in the construction field.

Provided is an assembled joint node for a column base and a construction method thereof. The assembled joint node for the column base can be used in a prefabricated reinforced concrete column, a reinforced concrete foundation, a column anchorage longitudinal rib, a grouting sleeve and a foundation anchor steel bar, wherein the foundation anchor steel bar is connected with the column anchorage longitudinal rib through a crack pouring material, and the grouting sleeve is filled full with the crack pouring material; a spliced seam of the reinforced concrete foundation and the prefabricated reinforced concrete column is also filled with the crack pouring material, and the foundation anchor steel bar comprises a vertical part and a horizontal part; the vertical part comprises an upper anchorage section, which extends beyond the upper surface of the reinforced concrete foundation, a middle no-bonding section, which is embedded in the reinforced concrete foundation, and a lower anchorage section; the outside of the middle no-bonding section is provided with an isolation suite which is used for isolating the the middle no-bonding section and preventing the middle no-bonding section from being bonded with concrete; the top surface of the isolation suite is aligned with the upper surface of the reinforced concrete foundation. According to the assembled joint node for the column base and the construction method of the assembled joint node, the deformation capability and the mechanical property of the node at the column base in an assembled structure, the construction is efficient, and the seismic performance is good.

The invention discloses a column-through assembled prestressed concrete frame system and a construction method thereof. The system comprises a foundation, a prefabricated reinforced concrete column, a prefabricated reinforced concrete beam, a superimposed floor slab and an external hung prefabricated wallboard, wherein a column prestressed duct is formed in the prefabricated reinforced concrete column; a beam prestressed duct is formed in the prefabricated reinforced concrete beam; post-tensioned unbonded prestressed tendons are penetrated into the beam prestressed duct and the column prestressed duct; energy-dissipation steel bars are anchored between the prefabricated reinforced concrete column and the superimposed floor slab. The structure provided by the invention has a good seismic performance; the lower part of a beam-column joint is subjected to unreinforced connection so that the structure is simple; the post-tensioned unbonded prestressed tendons and a replaceable column base energy dissipater are used so that the structure is less damaged and easy to be repaired in the earthquake; a construction manner of using the prefabricated superimposed floor slab and prestressed assembly makes site construction convenient and rapid and saves a lot of supports compared with a traditional prefabricated assembly structure; the column-through assembled prestressed concrete frame system provided by the invention is used in combination with lateral supports, shear walls and other lateral force resisting members, and is applicable to most high-rise public buildings.

The invention relates to the improvement of reinforced concrete beams for buildings and the connection joints of beams and columns, and is characterized in that transverse T-shaped structural section steel joints are disposed at the two ends of the reinforced concrete beam, wherein the T-shaped transverse end surface is at least equal to the cross section formed by the steel reinforcement cage in the beam, and at least in the reinforced concrete prefabricated beam, through holes are disposed at the corresponding positions of the main and auxiliary steel reinforcement; perforating plug welding or connection is formed by each main and auxiliary steel reinforcement perforating through the through holes; the reinforced concrete column connects the joints; an axial steel pipe is disposed at least in the cross section of the connecting part section of the column and the prefabricated beam; and a section steel joint extending outside the side surface of the column is disposed at the connecting surface of the steel pipe and the beam. Therefore, a strong joint structure is formed which is shear resistant, bending resistant, and has strong bearing capability; and also an elastic structure with a steel structural beam is formed which is anti-seismic and has good security. Prestress tension is built-in, so the invention is applicable to the production of large-span prefabricated reinforced concrete beams with a length more than 8 meters. The advantages of quick installation, high strength, elastic structure, and good security of steel structural beams are combined, and the cost is only 1/3 of steel structures, so the comprehensive benefit cost remains lower than that of reinforced concrete.

The invention discloses a fastened steel pipe concrete column confined by pre-stress and a reinforcement method thereof. The column is mainly applied to the reinforcement of a monolayer, multilayer or high-rise frame column which exceeds the limit value of the strength, rigidity or axial compression ratio. The basic principle of the invention is as follows: transverse pre-tensioning of a steel plate which is added to the surface of a rectangular or round reinforced concrete column is built up by screwing down a shear high strength bolt and the resultant force thereof acts on the surface of the reinforced concrete column; in accordance with the principle that acting force equals to counter acting force, the surface of the reinforced concrete column generates a counter acting force (positive pressure) towards the inner wall of the steel plate; in such way, friction force, which is corresponding to the positive pressure and is the so-called shear resistant bearing capacity in a project, is generated between the concrete surface and the inner wall of the steel plate, thereby achieving the loaded effect of the current steel pipe concrete column that is manufactured by casting concrete on the prepared steel pipe. Due to the existence of the transverse pre-stress, the mechanical effect of the steel pipe concrete column in the invention is better than the current one.

A preparation method for a TRC formwork reinforced concrete column comprises the following steps that a fiber woven mesh with high tensile resist strength and good decay resistance is adopted, and the fiber woven mesh is dipped into glue or strengthened through a steel wire mesh liner; an inner mould is mounted, shear resistant hooks are mounted in drill holes of the inner mould in an inserting mode, and the fiber woven mesh is fixed to the outer side of the inner mould; an outer mould is built on the outer side of the fiber woven mesh, prepared high-performance concrete is slowly poured into space formed by the inner mould, the fiber woven mesh and the outer mould, and manufacturing of a TRC formwork is finished; and after a TRC formwork layer reaches the set strength, formwork disassembling is carried out, the concrete is poured into the TRC formwork, and preparing of the TRC formwork reinforced concrete column is finished. Compared with the prior art, time and labor are saved, the cost is reduced, and the construction efficiency is improved; the bearing capacity and ductility of the reinforced concrete column are improved, and the durability of components in severe environments such as a cold environment and an alkalinity environment is improved; and strengthening of a building is more efficient, simpler, cheaper and more environmentally friendly.

Relating to the field of civil engineering, the invention provides a test device for time varying mechanical properties of a column under a load-environment coupling effect. The device comprises a column, a loading system, an environment corrosion accelerating system, and a measuring system. Specifically, the column is installed on the loading system which imposes a load on the column; the column is also in connection with the environment corrosion accelerating system so as to accelerate environment corrosion of the column; and the column is connected to the measuring system for real-time monitoring of time varying mechanical properties of the column. In the corrosion acceleration process of a member, the device of the invention not only can realize real-time observation of a member deflection change and the stress strain changes of steel bars and concrete, but also can observe the whole cracking and development process of a crack on the column during degradation, thus simulating the actual working state of the column completely, and successfully providing a solution to monitoring of time varying degraded mechanical properties of a reinforced concrete column under a load-environment coupling effect.

The invention relates to a building column-truncating, replacing and seismic-isolating support construction method and a supporting device. The construction method includes 1), mounting the supporting device, namely mounting the supporting device around an original-structure reinforced concrete column where a seismic-isolating support is needed to be mounted; 2), after the supporting device is mounted, truncating the column at a position where the seismic-isolating support is mounted; 3), disposing the seismic-isolating support in the position to complete mounting of the rubber seismic-isolating support. Seismic isolating technology is applied onto an existing building by utilizing a supporting system, so that cost for reinforcement and reconstruction is greatly lowered, earthquake resistance of the building is effectively improved and enhanced, a mode which is safer, more economical and more environment friendly is brought to proprietors, and a novel reinforcement method solution and a more scientific anti-seismic mode are provided for old buildings positioned in seismic areas.

A reinforced concrete pile with super strength load concrete core includes a normal reinforced concrete shell and a super strength load concrete core of the same length with the shell. This could reduce the sectional area of the traditional pile and the consumption of reinforcing materials.

The invention discloses a connecting joint of a prefabricated hollow steel-reinforced concrete column and a steel beam and a construction method. The connecting joint comprises the prefabricated hollow steel-reinforced concrete column, the H-type steel beam, a horizontal connecting disc and a connecting piece. In the construction process, the horizontal connecting disc and the connecting piece are attached to a central steel tube to be manufactured with the hollow steel-reinforced concrete column in a factory, and prefabricated hollow steel-reinforced concrete column splicing and steel beam installation are carried out at the construction site. The connecting joint is simple in structure and reliable in force transmission. The steel beam and the hollow steel-reinforced concrete column are manufactured in the factory, therefore, the operation condition can be improved, and the quality is easily guaranteed. The construction method for connecting the steel beam with the prefabricated hollow steel-reinforced concrete column is easy and convenient to achieve, and influences of installation errors on stress in a joint area are fewer. After concrete is poured, two materials including steel and the concrete are mutually limited and jointly stressed, and the improvements of the bearing capacity, the rigidity and the ductility of the joint are facilitated.

The invention relates to a connecting method of a steel beam and an existing reinforced concrete column, which can be used for reinforced modification of an existing reinforced concrete structure, and belongs to the technical field of structural engineering. The method comprises the steps of: scabbling, planting bars and binding reinforced mesh pieces on the surface around with a node connection domain of the original reinforced concrete column; processing two pieces of channel steel and welding a stud connection piece inside; extending an extending bracket and external reinforcing plate on the channel steel connected to the steel beam; buckling the two pieces of channel steel and wrapping the original reinforced concrete column; welding in an abut manner; pouring node area concrete; and finally connecting the steel beam. The method overcomes the deficiencies of the conventional connection method, is simple in structure, quick and convenient to construct, good in stress performance of the connecting node, reliable in force transfer, and can efficiently prevent a node core area from cracking and being exposed. The core area concrete is wrapped by a steel plate so that the concrete is strongly constrained, and the quake-proof ductility of the node is good. The method has high practicality and wide application prospect.

The invention provides a combined column foot capable of being repaired in situ, which is good in anti-earthquake performance and capable of being rapidly repaired after an earthquake. The combined column foot comprises a steel plate bucket, a damper with one end connected to the outer side surface of the steel plate bucket, and a connection plate connected with the other end of the damper, wherein the connection plate is fixedly installed on a ground beam corresponding to a reinforced concrete column, the damper is provided with a detachable flexible steel plate, and the flexible steel plate is vertically placed. By arranging the damper (the flexible steel plate), in case of a small earthquake, the flexible steel plate used as an energy-consuming plate of the damper is capable of generating a concentrated deformation to absorb most of earthquake energy due to a relatively good plasticity; in case of a strong earthquake, the flexible steel plate generates a shear yield to consume the earthquake energy, thus greatly protecting the reinforced concrete column from being damaged or collapsing and further achieving good anti-earthquake performance; meanwhile, because the flexible steel plate is detachable, the damaged flexible steel plate can be taken off and replaced by a complete flexible steel plate after the strong earthquake, thus realizing post-earthquake rapid repair.

The invention provides a fully prestressed and compositely integrally reinforced concrete structure of adopting a compositely integral dual-measure reinforcing technology of prestress and binding to reinforce a concrete beam, a plate, a column and a joint. The reinforced concrete structure comprises a beam to be reinforced, a stressed area steel plate, a tensile region steel plate, a steel plate hoop, a cable-stayed rebar and a screw, wherein a column structure of the reinforced concrete structure comprises a column to be reinforced, a jack, a welding temporary bracket and at least two groups of reinforcing assemblies; the reinforced concrete column structure comprises the column to be reinforced, a fixing component, a connection steel plate and at least two groups of reinforcing assemblies, and the reinforced concrete cantilever plate structure comprises a cantilever plate extension end to be reinforced, a steel plate strip, an chemical anchor bolt and a fastener, so as to solve essential issues that old and new structures of the known reinforced concrete structure reinforcing technology cannot cooperatively work.

The invention discloses a prefabricated reinforced concrete column and column splice joint adopting connection of embedded corrugated sleeves and high-strength reinforcement. The splice joint mainly comprises a prefabricated reinforced concrete upper column, a prefabricated reinforced concrete lower column, steel sleeves, the embedded corrugated sleeves and the high-strength reinforcement. An installation method of the splice joint comprises the following steps: in a factory, realizing the embedded high-strength reinforcement by a method of firstly pouring non-shrinkage self-compacting high-strength concrete into the embedded corrugated sleeves of the prefabricated reinforced concrete upper column and then inserting the high-strength reinforcement; and at the construction site, grouting the corrugated sleeves of the reinforced concrete lower column, inserting the embedded high-strength reinforcement of the upper column in the corrugated sleeves of the lower column and simultaneously welding the steel sleeve joint parts on the outer surfaces of the columns, thus realizing prefabricated reinforced concrete column and column splicing. The splice joint has the beneficial effects that all the used components are assembled and connected on the site, thus reducing reinforcement assembling and formwork supporting on the site, improving the building industrial assembly efficiency and reflecting the novel building concepts of environment friendliness and energy saving of building components.

The invention provides a method for reinforcing a concrete column by utilizing a PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe and belongs to the technical field of civil engineering. The method is suitable for maintaining and reinforcing the concrete columns in civil buildings, industrial plants and bridge structures. By mainly aiming at the reinforced concrete column, a PVC pipe is sheathed outside the concrete column, a reinforcing steel bar is configured in the PVC pipe, FRP cloth is wound outside the PVC pipe to form restraint action on the concrete column with the PVCpipe, and the internal pressure of the PVC pipe sheathed outside should reach above 1Mpa. The FRP cloth can adopt a carbon fiber composite material, a glass fiber composite material or an aramid fiber composite material. Compared with the traditional reinforcing method, the method for reinforcing the concrete column by utilizing the PVC-FRP pipe has the advantages that the reinforced concrete column is high in bearing capacity, small in cross section size and good in ductility and durability; and the method is convenient to construct, low in construction price and the like.

The invention discloses a prefabricated prestressed concrete frame beam-column joint making disparate use of high performance materials, comprising prefabricated concrete beams, prefabricated concrete columns, prefabricated beam-bottom prestressed tendons, common rebars, beam-top common rebars, in-column vertical rebars, sleeves, connecting rebars, and U-shaped rebars. Post-cast sections are reserved at two ends of the pre-fabricated beams, and the prestressed tendons fitted to the bottom of the prefabricated beams extend out of beam ends and are anchored to the beam-end post-cast sections, forming the prefabricated concrete beam-column joint with the prefabricated concrete beams and columns through post-cast concrete. In order to ensure the integrity of the beam-column joint, the beam-bottom common stressed rebars are connected with aseismic rebars through the sleeves and the U-shaped rebars are disposed in a joint post-cast area. In order to improve the energy dissipating capacity of the beam-column joint, the two ends of the prefabricated beams are made by casting high ultimate strain concrete. The invention reduces the production and construction difficulty, decreases the section height or steel usage of the prefabricated concrete beams and ensures the integrity and aseismic performance of the beam-column joint.

A method for retrofitting a reinforced concrete column by compressing a reinforcing plate including a steel plate using an external pressure is provided. The reinforcing plate is compressed to double-layer or more, that is, multi-layer in due order, on the reinforced concrete column. Accordingly, since a workability of the retrofit is excellent and since the reinforcing plate is easily compressed on the surface of the reinforced concrete column by a small lateral pressure, sufficiently the reinforced concrete column could be reinforced. Besides, a compressive strength of the reinforced concrete column could be increased. In addition, the flexibility of the reinforcing plate and the energy absorption force of the reinforcing plate could be increased.

The invention relates to an installation underpinning method for an existing framed building reinforced by parallel seismic isolation supports, which belongs to the field of seismic isolation reinforcement. The installation underpinning method includes manufacturing upper brackets and lower brackets between a foundation and a sill of a multilayer frame structure and installing the seismic isolation supports; cutting off reinforced concrete columns among the seismic isolation supports after the concrete strength of the brackets reaches a designed value; safely transferring load on the structure columns onto the seismic isolation supports; and accordingly achieving the designed purpose of seismic isolation of the existing framed building. By the aid of the method, structural safety of underpinning construction is guaranteed, engineering progress is simplified and accelerated, construction devices and underpinning components are saved, accordingly, engineering manufacturing cost is lowered, and the installation underpinning method is extremely practical framed foundation seismic isolation construction technique.

The invention relates to the field of building operations, in particular to a device for hoisting prefabricated reinforced concrete column on site and a walking technology thereof. The purpose of the invention lies in providing a simple yet effect walking technology for hoisting prefabricated reinforced concrete column on site and the device for realizing the technology; the design is simple and the operation is effective. To achieve the purpose, the invention provides the following technical proposal: the device of the invention is composed of a wheeled supporting plate, steel sheets and braking angle iron and has the following characteristics: the supporting plate is a right-angle structure, the top of the right angle is provided with deflectable rolling-over wheels, the two ends of the supporting plate far away from the top of the right angle are respectively provided with deflectable wheels, rotary connecting rods are arranged on a deflectable wheel seat. With the device of the invention adopted, mechanical efficiency can be effectively improved, construction productivity can also be enhanced, thus accelerating construction progress and enjoying extremely noticeable economic benefits and comprehensive benefits.

Disclosed is a connecting structure of a frictional type damper assembling type frame joint. Prestress steel strands are arranged in steel strand embedded pipes of the structure, precast reinforced concrete beams are connected with precast reinforced concrete columns through the prestress steel strands, the seams between the beams and the columns are filled of high-strength grouting materials, and beam and column connecting joints are formed. Frictional type dampers are arranged at the positions of the beam and column connecting joints, and the connecting structure of the whole frictional type damper assembling type frame joint attached with prestress is formed. The constructing method comprises the steps that the precast reinforced concrete beams are aligned to the damper embedded pipes on the precast reinforced concrete columns; the steel strands are arranged in the steel strand embedded pipes of the precast reinforced concrete beams in a penetrating mode; the seams are filled with the high-strength grouting materials, and the whole beam and column joints are formed; frictional damper fixing screw rods are arranged in the damper embedded pipes in a penetrating mode to mount the frictional type dampers. According to the structure, the energy-dissipating capacity of the assembling type frame structure under the earthquake action can be effectively improved, effective connection of the columns and the beams is ensured, the earthquake energy can be effectively consumed, and the building structure is protected.

The invention discloses a sleeve reinforced concrete column. The sleeve reinforced concrete column is characterized in that: a sleeve (1) of a reinforced concrete column (2) is a prefabricated active powder concrete sleeve. The sleeve reinforced concrete column has the advantages of convenience for construction, low cost, high axial bearing capacity, good shock resistance, predominant fireproof performance, excellent durability and the like, meanwhile, saves more resources and energy, and accords with the requirements of sustainable development.

The present invention includes prefabricated assemblies which are assembled on a construction site to provide a permanent concrete mold with integrated structural reinforcement and structural splices for cast-in-place concrete structures. The invention enhances the quality of the cast concrete structure while lowering the cost of construction and construction time. Described herein is a column form assembly, a column closure panel assembly, a beam form assembly, and a slab form assembly which are used to construct cast in place structurally reinforced concrete columns, beams, and floor slabs with minimal form work and construction site logistics. Also described herein are a method of assembly of said structures and a method of fabricating said assemblies.