Method for prefabricating assembly type reconstructed and expanded building structure joint and structure node of building

Abstract

The invention belongs to the technical field of industrial and civil building structures and particularly relates to a method for prefabricating an assembly type reconstructed and expanded building structure node and the structure node of a building. The practical problem that linkage between a newly-built structure and an original structure is not easy to process is solved, the newly-increased loads of the original structure are reduced, and damage to the original structure is reduced. According to the particularity of reconstructed and expanded construction, the expanded structure connection mode is innovated, by the adoption of the prestress post-anchoring technique, the defects of rigid joints of a traditional expanded concrete structure are overcome through hinge joints, and steel bar interference and steel bar bond stress losses are effectively avoided. By applying the prestress post-anchoring threaded rod prestress, the shearing property of the joints is improved. By applying the technique, when reconstruction and expanding are conducted, the reinforcing and modification workload of the original structure can be reduced to the greatest extent, the construction period of the reconstructed and expanded engineering is shortened easily, quality control is facilitated, the engineering investment is reduced, and good economic benefits, social benefits and application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of industrial and civil building structures, and in particular relates to a method for prefabricated assembly-type reconstruction and expansion building structural nodes and the structural nodes. Background technique [0002] With the change and improvement of production and living requirements for existing building functions, the number of building renovation and expansion projects is increasing year by year. A large number of existing building structure facilities need to achieve new functions through reasonable expansion and transformation to meet new needs. Solving the relationship between the reconstruction and extension structure and the original structure is the focus and difficulty of the design. [0003] Conventional structure expansion often adopts the expansion method of concrete structure reinforcement, which has the following shortcomings: [0004] 1. The local steel bars and post-anchor planti...

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Problems solved by technology

[0004] 1. The local steel bars and post-anchor planting bars in the core area of ​​the joint are highly dense. The existing technology often adopts the post-anchor planting bar technology, but the location of the steel bars that need to be anchored and implanted in the expanded structure coincides with the position of the steel bars in the original structural node area, which is very easy to cause The planted reinforcement conflicts with the steel reinforcement in the original structural beam and column, resulting in the loss of the gripping force of the main reinforcement of the original structure, affecting the safety of the structure and inconvenient construction

[0005] 2. The joint of old and new components is easy to form a weak shear point at the root of the beam, which is prone to slip cracks and affects normal use

[0007] 4. The construction period is long, the degree of industrialization is low, the quality control is difficult, and it is easy to cause the quality of the project to decline

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