Prestressed steeling reinforcement method for concrete column

A concrete column and prestressing technology, which is applied in the structural engineering field of civil engineering disciplines, can solve problems such as the low stress state of the pasted angle steel, cannot fully play its role, and is difficult to achieve the expected purpose, so as to improve the earthquake resistance level and achieve good anchorage Effect, the effect of low labor cost

Inactive Publication Date: 2004-11-17
GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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Problems solved by technology

When strengthening the column with the ordinary clad steel reinforcement method, some special measures must be taken to strengthen the connection between the upper and lower ends of the reinforced angle steel at the four corners of the column and the beam-column joints or foundations to ensure that the angle steel can effectively share the later load of the structure, and the upper structure passes through the end joints The setting of the connection structure directly transmits the load to the angle steel, so that the angle steel is stressed, and the angle steel acts in reverse to give a concentrated force to the structure, and the concrete is locally compressed. It can be seen that the reliability of the end connection must be satisfied at the same time to achieve the reinforcement effect, and engineering practice is very common. It is d

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  • Prestressed steeling reinforcement method for concrete column

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Example Embodiment

[0028] Example 1:

[0029] The cross-section of the middle column of a workshop is 400×600mm, with 8Φ22+2Φ18 longitudinal steel bars, and the cross-section area of ​​the steel bars is 3550mm 2 , The height of the column from the top of the foundation to the second floor is 4.5m, the maximum axial force is 3200kN, the bending moment is 250kN*m, and the measured strength grade of the original concrete is C15. Reinforcement material: 4∠100×8, cross-sectional area 6256mm 2 , A3 steel, compressive strength 235N / mm 2 , Short-side hoop plate selection -80×6, cross-sectional area 480mm 2 , Choose -60×6 for long side hoop plate, cross-sectional area 360mm 2 , 16Mn steel, strength 295N / mm 2 , The spacing is 250mm, and the heating temperature of the long side hoop is 131℃ after calculation, and the heating temperature of the short side is 136℃. Construction: Chisel out the crisp concrete at the corners of the column, smooth the column surface with a grinding wheel, remove dust and wash the c...

Example Embodiment

[0030] Example 2:

[0031] A dormitory building found that the compressive strength of the first-story column concrete was too low and did not meet the design requirements. The structural review showed that the concrete strength of some of the columns was too low. The original column information was: the section of the central column was 500×600mm, with 8Φ25+4Φ20 longitudinal Reinforcing steel, cross-sectional area of ​​steel 5183mm 2 , The height of the column from the top of the foundation to the second floor is 3.8m, and the lowest measured strength of the original concrete is 15.6MPa. Reinforcement material: 4∠80×8, cross-sectional area 5100mm 2 , A3 steel, compressive strength 235N / mm 2, The short side hoop plate is -60×6, the cross-sectional area is 360mm 2 Long-side hoop plate selection -50×6, cross-sectional area 300mm 2 , 16Mn steel, strength 295N / mm 2 , The spacing is 250mm, the heating temperature of the long side hoop is 131℃ after calculation, and the heating tempe...

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Abstract

The invention provides a kind of prestress steeling reinforcement method for a kind of concrete pile, the method includes following steps: (1) construction preparing; (2) surface preprocess; (3) sets pile corner reinforcing steel and uses clamp to fix them; (4) heats and stretch-draw the banding board, then welds and fixes; (5) pours with high intensity adhesive material between the steel angle and the intervals among the piles; (6) checking; (7) restores the outer decoration layer. The invention uses the improvement of intensity and deformation performance in condition of three-axis pressed to upgrade the bearing of component, it doesn't increases the cross section, thus it won't affect the visible effect in the room; reduces the stress delaying effect. The shake resisting grade is upgraded, the cost is low.

Description

technical field [0001] The invention relates to the structural engineering of the discipline of civil engineering, in particular to the reinforcement method of prestressed steel-clad concrete columns. Background technique [0002] The detection, identification, reinforcement and renovation of existing buildings is a relatively new subject field. With the development of my country's construction industry and modern science and technology, this new subject has attracted attention from all aspects and has achieved exceptionally rapid development. In the future, the social demand for this subject will continue to increase, further demonstrating its importance and urgency. A large number of projects built in Guangdong and even the whole country during the period of great development will gradually enter the middle and old age. There is a great demand for the detection, appraisal, reinforcement and transformation of such buildings, and this field will gradually become an increasing...

Claims

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Application Information

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IPC IPC(8): E04C5/01E04G23/04
Inventor 韩金田周新华曹华先周茂清邓浩谢军龙郭贱苟刘洪波陆瑞明劳新龙
Owner GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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