Cross tenon type vertical bolt connecting joint of fabricated concrete frame structure

Abstract

The invention provides a cross tenon type vertical bolt connecting joint of a fabricated concrete frame structure. The cross tenon type vertical bolt connecting joint comprises an upper concrete column and a lower concrete column; a cross tenon is arranged at the bottom of the upper concrete column and is in matched inserted connection with a cross mortise formed in the top of the lower concrete column; bolt connecting grooves are formed in the four corners of the upper concrete column and above the cross tenon. Bolts vertically penetrate the four corners of the bottom of the upper concrete column from the four corners of the lower concrete column, stretch into the bolt connecting grooves and are fastened through nuts; the vertical bearing force of the upper concrete column and the lower concrete column is transmitted through cross mortise and tenon joint, and the force transmission section is the same as the section area of the concrete columns; meanwhile, integral stirrups are arranged at the joint so as to enhance the axial bearing force, the core position of the joint is in a three-direction pressed state under the axial pressure state exceeding the bearing force, ductility damage is generated, and the vertical bearing force is guaranteed; and bolt connection only bears the vertical loads of the columns, bears part of axial force in the normal state, bears pull force under the earthquake action and is clear in stress. The cross tenon type vertical bolt connecting joint has the beneficial effects of being simple in structure, convenient to construct, efficient in assembly and high in shear bearing capacity.

Description

technical field [0001] The invention belongs to the technical field of assembly-type frame structure component connection, and in particular relates to a cross-tenon type vertical bolt connection node of an assembly-type concrete frame structure. Background technique [0002] my country's construction industry is vigorously developing prefabricated structures. At the same time, the problem of joint strength of prefabricated structures has always been the difficulty and focus of research that hinders the development of prefabricated buildings. The vertical connection of the existing prefabricated concrete frame structure is mainly column connection, and the connection methods mainly include grouting sleeve connection, bolt connection, welding connection and so on. [0003] The grouting sleeve connection requires on-site wet work, which reduces the assembly rate and is inconvenient to operate. The existing methods cannot accurately check the effectiveness of the connection; t...

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Problems solved by technology

[0005] In order to overcome the above-mentioned defects in the prior art, the purpose of the present invention is to provide a cross tenon type vertical bolt connection node of a prefabricated concrete frame structure, which can solve the problem that the assembly rate of the existing prefabricated column connection is not high, and improve the standardization of construction. The degree of stress, the clear path of stress, and the improvement of the shear bearing capacity of the prefabricated column connection; it has the advantages of simple structure, convenient construction, efficient assembly, and strong shear bearing capacity

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