A construction method of a steel structure truss hanging structure

Abstract

The invention relates to a construction method for a downwards-hung structure of a steel structure truss. The construction method comprises the following construction steps: S1, truss hoisting, namelylifting a truss to a mounting position, then, welding and fixing an upper chord and a steel column, and abutting a lower chord with a corbel; S2, stress release deformation joint arrangement, namelyarranging a node position on a part where the lower chord of the truss is abutted with the corbel of the steel column, and disconnecting a part where the lower chord is abutted with the corbel to makethe truss form an upwards-hung truss; S3, constant load application, namely mounting a secondary beam after finishing the mounting and welding of the truss, then, mounting a steel bar truss floor bearing plate, and finally, carrying out concrete pouring construction; and S4, node welding, namely welding the lower chord of a main truss section with the corbel of the steel column. Due to the arrangement of a disconnecting node, an axial force for applying a constant load to the lower chord of the truss can be effectively released, a bending moment of the axial force of the lower chord of the truss to the steel column can be eliminated, and the construction method has the effects of optimizing the structural design, improving the stress capacity of the node and enhancing the shock resistance.

Description

technical field [0001] The invention relates to the technical field of steel structure engineering, in particular to a construction method of a steel structure truss hanging structure. Background technique [0002] At present, in the construction technology of steel structures, there are many studies on the treatment of welding stress, but there are few studies on the treatment of stress concentration at the nodes generated by structural dead load during the installation of steel structures. The traditional welding stress aging treatment methods are natural aging and thermal aging. There is also a vibration aging: the vibration aging is derived from the knock aging. Through special equipment, the workpiece is resonated at the natural frequency, so that the periodic dynamic stress and residual stress are superimposed, and the workpiece is partially plastically deformed to release the stress. Thereby reducing and homogenizing the residual stress inside the workpiece, so that...

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Problems solved by technology

[0003] However, in the process of steel structure construction, the stress generated by the application of structural constant load on the main stressed members is common. When the truss is lifted and installed, a large axial force F will be generated on the lower chord of the truss during the application of structural constant load. , the axial force of the lower chord of the truss is transmitted to the steel tube concrete column, which will cause a particularly large bending moment on the steel column. Under the action of the earthquake force, the steel column will not be able to bear this bending moment, which will affect the structural safety.

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