Concrete upright column steel truss

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a concrete upright column steel truss. The steel truss comprises a steel frame, an upright column made of reinforced concrete is arranged on the lower portion of the steel frame, and a hoisting trolley is arranged on the steel frame. An installation base is pre-buried in the top of the upright column, and an L-shaped pre-buried steel bar is arranged at the bottom of the installation base. A joint ball is rotationally connected with the interior of the installation base, a bolt is fixedly connected to the top of the joint ball, and the bolt penetrates through an installation hole in the steel frame and is connected with a nut. The steel frame continuously expands and retracts to drive the boltand the joint ball to rotate in the installation base when the temperature difference of day and night is violently changed. The torsion stress borne by the bolt is reduced while it is ensured that the steel frame reliably installs the upright column, the situation that the bolt bears repeated torsion stress for a long time and is broken is prevented, and the potential safety hazard that the steel frame falls off is reduced.

Description

Technical field [0001] The invention belongs to the technical field of building construction, and is specifically a concrete column steel truss. Background technique [0002] Steel trusses refer to trusses made of steel, crane beams, bridges and hydraulic gates of industrial and civil buildings, and steel trusses are commonly used as the main load-bearing components. Various types of towers, such as mast towers, TV towers and transmission line towers, are commonly used in space steel trusses composed of three, four or multi-faceted plane trusses. [0003] When steel trusses are used as roof supports for factories in desert climate areas, because the temperature difference between day and night can reach more than 40 degrees Celsius, the thermal expansion and contraction of the steel trusses are more severe, and the length of the steel truss varies greatly, which poses a greater threat to the concrete column; When the truss expands and shrinks, the torsional stress is continuously ...

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the deficiencies of the existing technology, the steel truss on the roof of the factory building in the desert climate area has a large temperature during the day and night, and the thermal expansion and contraction of the steel truss is relatively severe, which poses a greater threat to the concrete column; Torsional stress will be generated on the bolts fixing the steel truss on the column, which will easily cause the metal of the bolts to break after fatigue, resulting in a huge safety hazard. At the same time, the lifting trolley running on the steel truss will also aggravate the deformation and vibration of the steel truss, further accelerating the fatigue speed of the bolts. Problem, a kind of concrete column steel truss that the present invention proposes

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