Strengthened by CFRP company Tengzhou

 Consolidation Company Contact: 159-0066-1030 Rowe specializes in construction reinforcement materials, as well as to undertake structural reinforcement construction and professional qualifications of special reinforcement! National undertake professional: anchorage reinforcement, bonded steel reinforcement, crack reinforcement, Strengthened by CFRP, school seismic reinforcement, bridge repair and reinforcement, tunnel reinforcement, reinforcement of factory building, floor crack reinforcement, hotel transformation reinforcement structure Liangzhu Zi carbon fiber reinforcement, column angle steel reinforcement package perfusion; professional production: anchorage glue, glue stick steel, potting compound, pouring glue, carbon fiber plastic, carbon fiber, sealing glue, glue repair; warmly welcome you to inquire and negotiate! ; Reinforced concrete structures retrofitted with CFRP technology in recent years, people's security, usability and durability requirements of the growing structure, the existing structure of the maintenance and repair and reinforcement attracted wide attention to the engineering sector. There are many factors that can shorten the life of existing structures, such as physical aging, chemical corrosion, changes in social demands, improve design standards, these buildings there is a problem, when the reality is not allowed to tear down rebuild, you can only take appropriate technical measures for its reinforcement treatment. With the development of materials science, the fibrous material in civil engineering applications become a hot research topic, the fibrous material of carbon fiber for the reinforcement of concrete structures has its own technological advantage: efficient high-strength (can take full advantage of its high strength, high modulus characteristics to improve the strength and ductility of the structure and components, improve mechanical performance, achieve efficient reinforcement purposes), corrosion resistance and durability (carbon fiber material is chemically stable, not with the acid salt and other chemical reacting), without increasing the weight and volume components (carbon fiber light and thin), using a wide surface (carbon fiber is a flexible material, and can be arbitrarily cut), ease of construction (without large-scale construction machinery, occupy less space, no wet work). Carbon fiber cloth has been widely used reinforcement column slab of reinforced concrete structures, and by the National Industrial Building Diagnostics and Research Center renovation project editor, summarizing recent research domestic universities and research institutes as well as the design, construction units made of carbon fiber base cloth for structural reinforcement of practical experience, a large number of foreign-related reference materials, and a lot of trial and research on the development of a "carbon fiber sheet technical specification for strengthening concrete structures", the number of CECS146: 2003. The following will be described for a variety of conditions to its simple calculation. Carbon fiber reinforcement normal section bearing capacity of reinforced concrete flexural members: the normal section bearing capacity of the whole process of analysis assumptions: flat section assumption; reinforced with fully elastic-plastic stress - strain relations; compression zone concrete recommendations adopted E.Hognestad Non-linear stress - strain relationship; concrete compression zone along the section height divided into a limited area equal strips (small unit), and set each band uniform distribution of stress. According to a theoretical analysis and experimental data, a simplified calculation method, as follows: on the safe assumption that carbon fiber reinforced tensile strain equal tensile strain, and carbon fiber reinforced area into the equivalent area: where and denote carbon fiber area, tensile strength, equivalent to the area and reinforced steel tensile strength. Whichever area of ??carbon fiber net area that is: where is the calculated thickness of the carbon fibers, the carbon fiber sheet width, the number of layers. After getting the equivalent steel area, reference may be reinforced concrete in Single Rectangular Section normal section design flexural members formulas to calculate. The joint effect of the concrete compression zone point to take the moment in which a horizontal force balance is: The formula for the concrete prism compressive strength; the total area of ??steel and CFRP equivalent area of ??steel reinforced concrete structures in the match. Carbon Fiber Reinforced Polymer Reinforcement for reinforced concrete beams suitable reinforcement, the applicable conditions are: the compression zone height of not more than; after strengthening on bending capacity of the margin of increase should not exceed 40 percent; tensile reinforcement after reinforcement in the standard combination of load effects tensile stress should not exceed the tensile strength of steel standard. When the calculated relative compression zone height is not greater than, or less than, the thickness of the carbon fiber sheet response was reduction, specific calculation methods are detailed technical specification of the relevant parts. Wherein the carbon fiber sheet reaches its tensile strain and concrete crushing permit relative compression zone occurs simultaneously. Project Example 1: A hybrid structure, the original design for the classroom, due to changes in the requirements changed stacks. Due to the increased floor loads, making the lack of depth of the original design load beam flexural strength, the need for reinforcement processing. The beam span of 5m, cross-section dimensions, using original span moment load calculation for. Reinforcement force to 3Ф18, design strength, strength grade concrete desirability of using functional to the changed requirements of flexural capacity of beams. Under the existing concrete specifications of the original design is calculated to withstand the bending moment (the buildings are 89 standard design, according to the 89 concrete norms in material strength values ??are calculated), the beam is reinforced with CFRP, Paste beam bottom two layers in width, thickness of CFRP (CFRP tensile strength). There are, to meet the calculated requirements. There. Selection of two reinforcement program, one taking into account the effect of reinforcing points better than the whole, and second, taking into account the small probability of simultaneous failure of two cloth can improve safety after the reinforcing member. Project Example 2: Due to the construction of a residential area, the floor appeared a large number of through-cracks, and some appear to the plate angle, and some appear to cross the plate, resulting in a significant impact in the household. With reinforced with carbon fiber sheet, after the closing of cracks with resin, carbon fiber cloth wide selection board panel at the corner radial arrangement across the board at the end by pitch arranged along the fracture strike, and achieved good results. Carbon Fiber Reinforced Reinforced concrete section bearing capacity ramp flexural members: when reinforced with carbon fiber sheet reinforced concrete beams, the shear effect and stirrups similar action, when bending beam shear force, transfer agency and model truss rod complex power transmission mechanism arch institutions. Span ratio hours, baroclinic damage occurs. Strain slow pace of development of carbon fiber, in the member reaches the maximum shear capacity, carbon fiber strain is relatively small, their contribution to the shear bearing capacity is also smaller, reinforcing effect is not obvious. Building reinforcement Contact: 159-0066-1030 Lo