Old and new concrete interface beam and plate component connection structure and construction method thereof

Abstract

The invention discloses an old and new concrete interface beam and plate component connection structure and a construction method thereof. The old and new concrete interface beam and plate component connection structure comprises an existing beam type component, a force transmission beam and a new built plate component. The force transmission beam is connected to the end portion of the new built plate component and is integrally poured with the new built plate component. The outer side face of the force transmission beam is fixed to an old and new concrete bonding face of the existing beam component, and chiselling treatment is carried out on the old and new concrete bonding face. An interface rebar is arranged between the force transmission beam and the existing beam type component, one end of the interface rebar is anchored into the force transmission beam, and the other end of the interface rebar penetrates through the old and new concrete bonding face to be embedded into the existing beam component. According to the old and new concrete interface beam and plate component connection structure and the construction method thereof, the force transmission beam is arranged between the existing beam component and the new built plate component, the bonding area of the old and new concrete interface is increased, the mechanical bite force, the van der waals force and other interfaceacting force of the old and new concrete interface are remarkably increased, the force transmission effect of the old and new concrete interface is improved, the construction quality is ensured, andconstruction is convenient. The interface rebar is arranged between the force transmission beam and the existing beam component, and the shear capacity of the interface is increased.

Description

technical field [0001] The invention relates to a new and old concrete interface beam and plate member transfer structure and a construction method thereof. Background technique [0002] Concrete structure is the most common structural form in industrial and civil buildings in our country. Concrete reinforcement has been gradually carried out since the 1950s. Appropriate reinforcement techniques and practices ensure the safety of existing building structures and prolong their service life. In concrete reinforcement methods, the handover treatment of new and old concrete is one of the most common reinforcement methods. It is common to add new beams and new slabs to existing concrete columns; add new beams and new slabs to existing concrete walls; add new beams and new slabs to existing concrete beams, etc. [0003] Such as figure 1 , 2 As shown, the conventional new and old concrete bonding surface treatment is chiseling treatment, that is, chiseling 4 on the new and old ...

AI Technical Summary

Problems solved by technology

[0004] ⑴At present, there are no clear regulations on the chiseling depth and chiseling rate of most new and old concrete bonding surfaces in engineering, so that the chiseling quality is uneven during actual construction, which brings unsafe factors to the reinforcement quality

[0005] (2) According to the research on the bonding mechanism of old and new concrete in recent years, it is known that the bonding strength of the new and old concrete joint surface is much lower than the strength of the old and new concrete body, which is about 0.4 times that of the complete cast-in-place component. Therefore, when the old and new concrete interface is under excessive load , prone to direct shear damage

Images