Steel support structure for supporting multi-layer overhead corridor

Abstract

The invention discloses a steel support structure for supporting a multi-layer overhead corridor, and belongs to the technical field of steel structure design and construction. The steel support structure comprises a stand column support, and a truss support of a top corridor is installed at the top of the stand column support; a middle corridor is arranged in the stand column support, a deck type truss and / or an inner corridor type truss are / is arranged at the two ends of the middle corridor respectively, the deck type truss and / or the inner corridor type truss are / is assembled on the stand column support, and the deck type truss, the middle corridor and the inner corridor type truss jointly form the corridor; external reinforcing structural parts are arranged on the stand column support and symmetrically arranged on the two sides of the direction where the corridor is located, and a reinforcing area of each external reinforcing structural part stretches across an area where the corridor is located, so that the purposes that the structure has enough bearing capacity and rigidity through the design of the external reinforcing structure, and meanwhile the practical function of the structure is achieved are achieved.

Description

technical field [0001] The invention belongs to the technical field of steel structure design and construction, and in particular relates to a steel support structure for supporting multi-storey overhead corridors. Background technique [0002] Taking belt conveying as an example, factories that use bulk materials as raw materials or finished products generally have a large number of conveying equipment, most of which use belt conveyors, and the conveyors that are higher from the ground are mostly supported on the steel structure conveying corridor structure . The corridor structure includes multiple steel bracket structures, and multiple large-span steel truss structures supported on steel brackets. [0003] The main function of the steel support structure of the belt conveyor corridor is to provide support constraints for the horizontal truss structure of the corridor, and at the same time, bear the horizontal loads and functions acting on the corridor structure, such as:...

AI Technical Summary

Problems solved by technology

After the oblique rod is removed, the internal force of the column within a certain range up and down has a large bending moment and shear force in addition to the axial force. At the same time, the horizontal bar just connected to the column is also the same as the support column. Due to the large bending moment and shear force, the section of these members needs to be enlarged to meet the bearing capacity requirements, which ultimately leads to an increase in the amount of material used in the structure

[0010] 2. The layout of the anti-side members of the bracket is discontinuous and uneven, and the lateral stiffness suddenly changes at the position where the diagonal bar is removed, and the lateral displacement of the bracket increases

According to the principle of virtual displacement, for rods of equal length and cross-section, under unit internal force, the axial force displacement is less than 1% of the bending moment displacement, but often the increase in the bearing capacity calculation member section and the displacement calculation increase are not on the same order of magnitude. As a result, under the condition of satisfying the bearing capacity, the displacement of the structure increases a lot, and the stiffness of the structure changes suddenly, which is unfavorable to the overall stress of the structure

[0011] 3. The cross-section of the member is not optimized. The rod adopts the open-type double-angle steel cross-section. There are many types of parts and a large amount of processing and manufacturing. It is easy to form anti-corrosion dead angles, which is not conducive to the anti-corrosion of the structure during use.

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