What method of building reinforcement

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General method of direct reinforcement are: 1, to increase the cross-section of the Act reinforcement construction process is simple, adaptable, and have proven experience in the design and construction; for concrete beams, slabs, columns, walls and general structures of the reinforcement; but a long time wet site construction work, have a certain impact on the production and life, and building reinforcement after a certain clearance is reduced. 2, the advantage of this method is replaced with concrete reinforcement for increasing section method is similar, and the rear lock does not affect the clearance of the building, but there are also long-time construction jobs wet disadvantage; for the strength of concrete compression zone is low or there is Reinforcement seriously flawed beams, columns and other concrete load-bearing members. 3, bonded outsourcing steel reinforcement of the Act, also known as wet enclosing Steel Reinforcement, force, reliable, simple construction, site work is small, but the larger the amount of steel, and should not be the case in the absence of protection for place a high temperature above 600C; for does not allow the use of a significant increase in cross-sectional size of the original members, but require a significant increase its carrying capacity of the concrete structure reinforcement. 4. Paste the steel reinforcement rapid construction of the Act, no wet work site or only a small amount of wet plaster and other operations, the production and life of small effect, and no significant effect on the appearance of the original structure and original clearance after reinforcement, but reinforcement adhesive effect depends largely on the level of technology and operations; designed to withstand static force and in normal humidity environment by reinforcing flexural or tension members. 5, paste fiber reinforced plastic steel reinforcement method in addition to a paste similar advantages, but also has corrosion cloud, resistant to moisture, almost no increase in structure weight, durability, low maintenance costs and other advantages, but requires special fireproof treatment for various concrete structural members and the general nature of the force structure that is. 6, the advantages and disadvantages of the Act reeling with increasing section method is similar; for concrete structures reinforcement oblique section bearing capacity shortage or need to exert pressure on the lateral occasions binding member. 7, the anchor bolt of the Act applies to the transformation of concrete strength grade of concrete load-bearing structure of C20 ~ C60 and reinforcement; does not apply to the above structure has been severely weathered and lightweight construction. General method of indirect reinforcement are: 1, prestressed reinforcement of the Act to reduce the stress level is reinforcing member, the reinforcing effect is not only good, but also to improve the overall bearing capacity of more substantial structure, but the appearance of the original structure reinforcement have a certain influence; suitable for large-span or heavy structural reinforcement in concrete structures and high stress, high strain state of reinforcement, but in the absence of protective case, can not be used at temperatures above 600C environment, it should not be used shrinkage and creep large structures. 2. Increase support reinforcement method The method is simple and reliable, but easy to damage the original features of the building and use, and may reduce the use of space; for concrete structures reinforced concrete conditions permit. Retrofitting the concrete structure supporting the use of technology in general are: 1. Underpinning Technology joist (or truss, the same below) shall demolition column (or wall, following the same), joist and joist COLUMN columns and other technology exchange said; belonging to a comprehensive technology by the relevant structural reinforcement, lifting and resetting the upper structure and composition of the waste component removal techniques; for Retrofitting existing buildings; compared with traditional practices, with a short construction time, cost low impact on the life and production of small advantages, but the high technical requirements, need skilled workers to complete, in order to ensure safety. 2, anchorage technology department of a concrete structure relatively simple and effective connection with the anchoring technique; implantable ordinary steel, also implantable bolts Anchorage; Retrofitting project has been widely used in existing buildings, such as the : construction steel or reinforced drain buried remedy deviate from the design position, increasing section reinforcing member complement tendons, spreading across the upper structure, lifting of the beam, take a long, House floor high-rise building next column and the column additional shear The anchorage and the like. 3, crack repair technique based on the causes of cracks in concrete, character and size, using different methods to repair seal protection, so a specialized technical structure due to cracking and reduce the use of function and durability can be restored; for existing buildings handle all types of cracks, but the force of the crack, in addition to the patch, there should adopt appropriate reinforcement measures. 4, carbonation of concrete repair techniques (not ripe) refers to the concrete by restoring basic (inactivation) or increase the impedance caused by leaving carbonized steel corrosion curbed technology. 5, concrete surface treatment technology refers to the use of chemical, mechanical, blasting method, vacuum cleaning method, water jet method to clean up dirty concrete surface, traces of oil residue and other attachments expertise. 6, concrete surface sealing technology refers to the use of flexible sealant filling, polymer grout, concrete coating methods such as water, moisture and crack treatment technology. 7, other techniques, such as structural, component displacement technology, restructuring natural frequency technology. Reinforcement of masonry structures: reinforced masonry structures are divided into direct and indirect reinforcement reinforcement types, design, you can select the appropriate method based on the actual conditions and requirements. Directly applicable to masonry structure reinforcement method generally as follows: 1, plus a layer of reinforced concrete reinforcement of the Act belong to a composite cross section reinforcement method. The advantage is that the construction process is simple, adaptable, carrying capacity has improved greatly after the masonry reinforcement, and has proven experience in the design and construction; for the column, with walls reinforced walls; the drawback is wet site construction work time long, have a certain impact on the production and life, and building reinforcement after a certain clearance is reduced. 2, plus a layer of reinforced concrete mortar reinforcement of the Act belong to a composite cross section reinforcement method. The advantage with the additional layer of reinforced concrete reinforcement method are similar, but improve the bearing capacity than the former; for masonry wall reinforcement, sometimes used to close both sides of the reinforced concrete strengthened by additional layer pilastered wall stirrups. 3, additional help pilasters strengthening the Act belong to increase a cross-section of the reinforcement method. The advantage is also extra layer of reinforced concrete reinforcement method are similar, but limited capacity is improved, and more difficult to meet seismic requirements, generally only used in non-seismic area. Indirect Reinforcement method is suitable for masonry structures generally: 1, unbonded outsourcing steel reinforcement of the Act are traditional reinforcement methods, the advantage of simple construction, less site work and wet work, force more reliable; for not allow increased cross-sectional dimensions of the original members, but require a significant increase of flexural capacity of reinforced masonry column; the disadvantage is reinforced higher cost, and the need to adopt similar protective measures for steel. 2, prestressed reinforcement struts of the Act can greatly improve the carrying capacity of the masonry column, and the reinforcement effect is reliable; reinforcement suitable for reinforcement of high stress, high strain state of the masonry structure; the disadvantage is not used at temperatures above 600C environment. Construction of masonry structure reinforcement and repair 1, additional reinforcement ring beam the ring beam set when the current design does not meet the specifications, or vertical and horizontal wall junction bite rub obvious defects, or the integrity of the house is poor, should be an additional ring beam reinforcement 2, additional reinforcement mat beam when the beam is performed under local crushed brick wall or beam partial vertical cracks, should additional reinforcement beams pad. 3, masonry house partial demolition of the puzzle when partial rupture but after the break to find out their reasons for not affected bearing and safety, partial removal of the wall can be broken, according to the intensity level to improve mortar filled with whole bricks puzzle. 4, masonry repair cracks crack repair before proceeding, should be based on the stress state of the masonry components and characteristics of fractures and other factors to determine the cause of the cracks in the masonry to be targeted for appropriate reinforcement measures or the use of crack repair . Steel reinforcement methods: the main method of steel reinforcement are: to reduce the load, changing the structure of computation graph, increasing the original structure member section and joint strength, prevent crack propagation and so on. When a mature experience, you can use other reinforcement methods. 1, changing the structure of computation graph to change the structure reinforcement method computation graph refers to the situation by changing the load distribution, power transmission route, node properties and boundary conditions, and the addition of additional rod support, prestressed, consider the space to work on the structure and other measures reinforcement methods; general strengthening ways to change the structure of computation graph: (1) the structure of the following methods can be used to increase the stiffness of the structure or member reinforcement: A, increase the support structure in accordance with the spatial structure of a space checking; B, plus set support increased structural rigidity or restructuring of natural frequencies in order to enhance the structural capacity and improved dynamic characteristics; C, additional support or auxiliary rods so that the structure of the slenderness ratio reduction to improve its stability; D, in the bay focus on strengthening the rigidity of the structure of a column by column, so that they bear most of the horizontal force to relieve other column column load; E, setting appropriate tension rod or cable to enhance the stiffness of the structure of the tower and other structures. (2) The method by bending pole can be the following changes in the cross-sectional internal force reinforcement: A, change the distribution of loads, for example, a concentrated load into a plurality of concentrated loads; B, end support change, for example change hinged is just finished; C, an increase in the middle seat or simply supported end connections into a continuous structure; D, adjust the position of a continuous structure of abutment; E, the structure into a strut-type structure; F, prestressed. (3) take the following truss member forces to change their approach to strengthening: A, the addition of a strut-type struts change truss structure; B, plus set prestressed lever. 2, increase the member section of the reinforcement using steel reinforcing member increasing section when the selected section type should be conducive to strengthening the technical requirements and consider the existing deficiencies and condition of injury. 3, the connection method of reinforcing steel connection and reinforcement member connected, choose the welds, rivets, bolts and bolts connecting ordinary method should be based on need reinforcement structure, an object, force status, structure and construction conditions and to consider the structure of the existing connection method OK. Steel reinforcement is generally should adopt welds, friction-type high-strength bolted connection, you can use a mixed connection welds and friction-type high when there is basis. When welds should be assessed using approved welding processes and connecting material. 4, repair and reinforcement of structural cracks due to repeated load effects and material selection, construction, manufacturing, construction and installation of improper scalable generated when the brittle fracture tendency to crack or damage, should seek to repair. Before the repair, you must analyze the causes of cracks and the seriousness of the impact of targeted measures to improve the structure of the actual work or reinforcement, should not be used for repair and reinforcement member, should be dismantled to be replaced. 50 years, China's construction and reinforcement technology has undergone post-mortem test from scratch, from the individual to the full, from the local component to the overall structure of the development process. Especially in the last 20 years, the structure of detection and reinforcement technology has been rapid development, old houses from the beginning of its application objects monolayer extended to the construction of various types of structure. Development and application of structure detection and reinforcement technology for improving the quality of construction has played a positive role in the state and enterprises save money, protect the safety and security of life and property of production also play a role.