Construction method for releasing strong restraint stress of steel connecting rods of oblique and stiffened concrete structures

Abstract

The invention relates to a building construction method, and discloses a construction method for releasing strong welded connection restraint stress of steel connecting rods on upper parts of two stiffened concrete structures which are oblique relatively. The construction method comprises the following steps: A, carrying out concrete pouring on floors and beams of the nth storey in one building; correspondingly setting after-cast section areas on which concrete pouring does not be carried out temporarily, at a place, which is required to be connected with a steel connecting rod, on nth storey in the other building, and constructing concrete pouring on the remaining floors and beams thereof; B, carrying out installation of steel connecting rods between nth floors of two oblique and stiffened concrete structures; and C, carrying out concrete pouring in the after-cast areas on the nth storey of the oblique and stiffened concrete structure of the other building after finishing installation of the steel connecting rods, completely cooling and fully releasing strong restrain stress. By adopting the construction technology of reasonably presetting the after-cast section areas, the invention enables the strong restrain stress generated by the steel connecting rods to be released successfully, enables the construction to meet structure design requirements, simultaneously, accelerates construction speed and achieves obvious economic benefits and social benefits.

Description

technical field [0001] The invention relates to a building construction method, in particular to a construction method for releasing the strong restraint stress of a steel connecting rod of an inclined rigid concrete structure. Background technique [0002] Stiffened concrete structure is a kind of concrete structure that adopts section steel or welded and formed steel with steel plate as the skeleton. Because this kind of concrete structure has the advantages of large bearing capacity, good seismic performance and convenient construction, it has been more and more applied to In high-rise buildings and long-span building structures. [0003] At present, there is a class of buildings that are composed of two buildings that adopt an inclined rigid concrete structure, and the inclination directions of the two buildings are opposite. Due to the offset of the center of gravity and stiffness of the inclined stiffened concrete structure, steel connecting rods were installed on the...

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Problems solved by technology

[0004] However, since the steel connecting rod is connected by welding, strong restraint stress will be generated during installation and construction

If the steel connecting rods are welded directly after the concrete pouring of the two inclined stiffened concrete structures, the welding process will generate strong restraint stress on the rigid structures at both ends of the steel connecting rods due to the high-temperature thermal expansion and cooling contraction of the steel connecting rods. Structural cracks occur in the steel concrete columns at the lower part of the concrete structure, which cannot meet the design requirements of the structure

If the structural construction of the inclined stiffened concrete structure layer where one end of the steel connecting rod is located is carried out first, and the inclined stiffened concrete structure at the other end is not constructed temporarily, the installation of the steel connecting rod structure is completed and the stress is completely released. The construction of the structure at the other end has a great impact on the coordination of the overall construction progress of the engineering structure

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