Concrete flexural member with prestressed aluminum alloy plate and its flexural strengthening method

Abstract

The application relates to a concrete bending component with a prestressed aluminum alloy plate and a bending resistance strengthening method, including a bending component main body, an aluminum alloy plate, and a post-anchoring connection of a bar-planting type. First, the post-anchor connection is adopted, and the lower edge of the aluminum alloy plate is fixed in the tension area of ​​the side of the bending member with a certain curvature, that is, the convex form, and the end of the aluminum alloy plate is fixed; then, the post-anchor connection is used to fix the bar. And flatten the edge of the aluminum alloy plate. During the flattening process of the aluminum alloy plate, an upward prestress is applied to the flexural member, so that the bending deformation can be recovered, and the ductility and deformation capacity of the member can be maintained or even improved while increasing the flexural bearing capacity. This application adopts the post-anchored connection of planting bars to transmit the shear force between the aluminum alloy plate on the beam side and the main body of the bending member, which can directly transmit the internal force of the aluminum alloy plate to the interior of the concrete member. In addition, the anchor bolt has a certain shear deformation The ability can realize the redistribution of shear force among the anchor bolts and avoid stress concentration.

Description

technical field [0001] The present application relates to a flexural member, in particular to a concrete flexural member with a prestressed aluminum alloy plate and a flexural strengthening method. Background technique [0002] With the development of smelting technology, in recent years, the cost of aluminum alloy has been continuously reduced, and its strength has been continuously increased to the level close to that of construction steel, and its specific strength (ratio of strength to density) is significantly higher than that of steel. In addition, aluminum alloy does not have the corrosion problem of steel, and is resistant to corrosion by chloride ions. It can be used in special occasions such as preparing concrete from seawater and sea sand and concrete buildings in coastal environments. [0003] At present, the most widely used reinforcement methods for reinforced concrete flexural members are mainly beam bottom bonding steel and carbon fiber bonding methods. Thes...

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Problems solved by technology

These two methods can have a better strengthening effect on beams with lower reinforcement ratios, but they will lead to super-reinforced damage to beams with higher reinforcement ratios, and brittle peeling often occurs at the ends of steel plates or carbon fiber sheets

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