Building progressive collapse resisting reinforcing system and method with HPFL and steel plates combined

Abstract

The invention discloses a building progressive collapse resisting reinforcing system and method with HPFL and steel plates combined. The system comprises the anchoring steel plates bonded on the surface of a column to be reinforced and an HPFL reinforcing layer arranged on the surface of a beam to be reinforced, and the HPFL reinforcing layer comprises a carrying steel net, an adhesion agent layer and a high-performance mortar binding layer. The method comprises the steps that 1, loads are removed, the surface is leveled, and cracks are sealed; 2, the surface is polished, cleaned and dried; 3, the anchoring steel plates and the carrying steel net are prefabricated; 4, the carrying steel net is anchored on the anchoring steel plates, and fixes the anchoring steel plates; 5, the carrying steel net is fixed; 6, watering wetting is carried out; 7, the adhesion agent layer and the high-performance mortar binding layer are sprayed; 8, maintenance is carried out; 9, rust preventing treatment is carried out on the anchoring steel plates. The building progressive collapse resisting reinforcing system and method are convenient to construct, the bearing capacity and ductility of the original beam to be reinforced and the original column to be reinforced are improved, a building to be reinforced is not damaged, the integrality and progressive collapse resisting capacity of the building are improved, and application and popularization are facilitated.

Description

Technical field [0001] The invention belongs to the technical field of construction engineering, and specifically relates to a continuous collapse-resistant reinforcement system and method for buildings combined with HPFL and steel plates. Background technique [0002] With the improvement of my country's economic level, the reinforcement technology of reinforced concrete buildings has also been greatly developed. At present, my country's structural reinforcement and transformation industry has become one of the main industries in the field of civil engineering. Due to changes in the use of buildings, earthquake damage, impact and explosion damage, buildings often face the risk of continuous collapse. The current commonly used reinforcement techniques include: reinforced high-performance mortar reinforcement, bonded steel reinforcement, FRP reinforcement, enlarged cross-section reinforcement, etc., but the reinforcement goals are generally limited to improving the bending and sh...

AI Technical Summary

Problems solved by technology

However, this reinforcement technology also has the following disadvantages: this method needs to fix the stress tendons through expansion bolts, shear pins, etc., and provide shear bond strength, the construction is more troublesome and causes some damage to the original structure; the reinforcement layer and the original structure Bonding and peeling failure occurs in the transaction between the two, and the strength of the reinforcement material is not easy to be fully utilized; it is difficult to meet the requirements of high rigidity and ductility of the structure

However, this method requires a large amount of on-site wet work and a long curing time. The thickened part increases the self-weight and dead-load bending moment of the structure. The bearing capacity is limited by the original concrete strength in the compression zone, and affects the structural headroom. The usable space of the original structure has a great influence. At the same time, if the steel bars are to be continuous, the penetration damage to the original structure cannot be avoided, making it unsuitable for continuous collapse resistance reinforcement.

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