Method for strengthening existing frame additionally provided with steel support with border

Abstract

The invention relates to a method for strengthening an existing frame additionally provided with a steel support with a border, and belongs to the technical field of aseismic strengthening. The method comprises the steps of firstly, removing a crown wall, a waist wall and a wing wall inside the existing frame, reserving a concrete frame column and a concrete frame beam, embedding post-anchored bolts on the concrete frame column and the concrete frame beam, manufacturing the support with the steel border, welding toggle pins on the outer side of the profile steel border of the support with the steel border, embedding the support with the steel border into a frame structure, arranging spiral reinforcement bars at connection points, and pressing non-shrink mortar into the connection points. The method is easy to operate and reliable in maintenance effect, force can be transmitted to a building foundation through the added supporting member, and therefore the method for strengthening the existing frame is suitable for strengthening and maintenance of a whole building.

Description

technical field [0001] The invention relates to a reinforcement method for an existing frame by adding a steel support with a frame, and belongs to the technical field of seismic reinforcement. Background technique [0002] Reinforced concrete structure is currently the most widely used structural form. A number of office buildings, residences, shopping malls, etc. with reinforced concrete structures have been built in our country. Due to reasons such as improper design of houses, improper use and maintenance, construction quality, and natural disasters such as earthquakes, many houses have problems of one kind or another, and some problems are quite serious, which threatens structural safety. Or because of new usage requirements, the house needs to be changed or added floors. Reinforcement of the original structure is required. [0003] At present, the reinforcement method recommended in the code is still mainly to strengthen the structural components, in order to improv...

AI Technical Summary

Problems solved by technology

There are many disadvantages in this kind of method. For example, to make the newly added structure bonded with the original structure to bear the force together, the implementation will generally excavate the original structure, and the bonding effect will be difficult after the adhesive is connected. At the same time, based on the current situation, the original structure cannot be unloaded. The original load-bearing structural members are forced to accept the newly added surface after the main force deformation has been completed. The force of the newly added surface members often lags behind during the earthquake. There is a large deviation in the calculation model of the force and reinforcement design

For some structures whose actual anti-seismic capacity is very different from the current anti-seismic requirements, if a large number of components are reinforced one by one, the engineering volume will be very heavy, not only the construction period will be long, but also the decoration will be greatly damaged. Ensure that the strengthened structure can play an effective role in cooperating with the force under the earthquake

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