A method for strengthening reinforced concrete floor slabs with profiled steel plates

Abstract

The invention belongs to the field of building structure reinforcement, and particularly relates to a method for reinforcing a reinforced concrete floor with a profiled steel sheet. By using the reinforced concrete floor, wet operation is avoided, a smaller architecture net space is occupied, and the construction period is short; Because peaks and troughs of the cross section of the profiled steelsheet are alternately expanded, the inertia moment of the section of the profiled steel sheet is relatively large, and the rigidity of the reinforced concrete floor can be improved; the troughs of the reinforced profiled steel sheet are equivalent to longitudinal beams, so, the section height of the reinforced concrete floor can be increased, and bearing capacity of the reinforced concrete floorcan be improved; the profiled steel sheet has good seismic performance, and hence, ductility performance and seismic energy dissipation performance of the reinforced concrete floor can be improved.

Description

technical field [0001] The invention belongs to the field of building structure reinforcement, and in particular relates to a method for reinforcing reinforced concrete floor slabs with profiled steel plates. Background technique [0002] Affected by factors such as chemical erosion, concrete deterioration, steel corrosion, defects in the construction process, backward design standards, and changes in structural functions, a large number of existing building structures can no longer meet the required standards for current use. In the prior art, to deal with these building structures that do not meet the existing requirements for use, one method is to dismantle and rebuild, and the other method is to repair and reinforce. However, the economic cost of demolition and reconstruction is high, the construction period is long, the social impact is great, and the demolished construction waste causes great harm to the environment. Therefore, it is a preferred method to make the buil...

AI Technical Summary

Problems solved by technology

Paste FRP method and bonded steel reinforcement method can improve the bearing capacity of reinforced concrete slabs, but FRP is brittle, and the pasting quality of bonded steel is not easy to control. After a certain limit, the reinforced concrete will have a brittle failure form in the reinforced concrete compression zone, so these two methods can only increase the bearing capacity of the reinforced concrete floor to a limited extent.

The external prestressed reinforcement method requires tensioning equipment and anchors, the construction process is complicated, and there is a problem that the control of prestressed tension is difficult

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