How to reinforce the insufficient bending capacity of the edge beam and edge plate of the frame structure?

The key to solving the problem lies in how to achieve reliable anchoring of the ends. Carbon fiber reinforcement should not be used at this time, but can be reinforced with adhesive steel as follows:

1. Welding strong steel bars at the front end of the steel plate, drill holes in the column or beam, the depth should not be less than 15d, and anchor the steel bars while pasting the steel plate.

2. Set up anchor plates or steel sleeves on the columns or beams, weld the steel plates to them, and then pour or stuff the structural glue into the sticking parts.

Can the shear reinforcement of U-shaped steel hoop plates be prestressed?

The screw can be welded at the end of the hoop plate. Use a jack tension screw or torque wrench to tighten the nut to establish pre-stress to reduce shear stress lag.

Why should the bonding interface be dry when pasting and anchoring?

The wet interface has a certain negative effect on the durable adhesive strength of the structural adhesive, so it is best to keep the bonding interface dry.

What are the construction measures to reduce cracks in concrete structures?

The stability of cement, the alkali activity of bone, the raw material of concrete, and the crack resistance of concrete should be tested.

The template supporting the cast-in-place concrete structure must be designed to have sufficient strength, rigidity and stability through the formwork design.

Construction load should be strictly controlled.

All kinds of steel protection layers of concrete structures must have reliable control measures.

Strictly control the access and feeding time of cast-in-place concrete floors.

Concrete structures that need to be concealed shall be concealed in time after the acceptance and attachment contents are completed. The concrete components shall be protected from wind, frost, and rain during the stoppage.