Qingdao Sticky Steelplussoliddefinition
The bonding steel reinforcement method is a reinforcement method that uses special glue for building structures to paste steel plates on the surface of reinforced concrete members to improve the bearing capacity of the members.
Fleming and King, professor of architectural structure at the South African School of Civil Engineering, were the first to use steel plates to reinforce concrete surfaces. In 1967, they carried out the experiment of pasting steel plates instead of steel bars on plain concrete beams, setting a precedent for pasting steel plates to strengthen. On the basis of experimental research, the University of Seifel successfully strengthened a highway bridge in 1983 by using bonded steel reinforcement technology, allowing the original 110t bridge to pass 500t trucks. The first reinforcement project in my country was the load-bearing beam of the substation of the Liaoyang Chemical Fiber Plant, which was completed in 1978. Good results have been achieved, setting a precedent for my country's reinforced concrete reinforcement projects.
Key points for the design of bonded steel reinforcement
The steel-bonded steel bars of reinforced concrete flexural members are bonded with steel plates on the surface of the section with insufficient bearing capacity (normal section tension zone, normal section compression zone or oblique section compression zone), which can increase the bearing capacity of the reinforcement member and facilitate construction .
Qingdao Sticky SteelThe bearing capacity of the normal section of the reinforced concrete beam can be calculated according to the bearing capacity of the normal section of the reinforced concrete bending member; when the member's oblique section shear capacity is insufficient, the U-shaped hoop plate or diagonal steel belt can be used for reinforcement, according to the reinforced concrete bending member Calculation of the bearing capacity of the oblique section. According to the "Specifications for Reinforcement Design of Concrete Structures" (GB50367-2006) promulgated by the Ministry of Construction, reinforced concrete bending members, compression members and tension members can be calculated for normal section and oblique section reinforcement to determine the thickness and layout of the steel plate.
When the reinforced concrete flexural member adopts normal section reinforcement, the steel plate continuously pasted along the axial direction of the member should extend to the edge of the support, and U-shaped steel hoop plates (including truncation) and both sides of the stress point Anchoring beams) or transverse reinforcement (slabs).