Reinforcement method for steel column in steel structure machining

Steel structure now seems to have become a part of our life, is also a way of building more common among, in order to stabilize the performance of steel structure building steel structure processing process of the steel column has an unusual relationship processing, machining method for steel column, ShengDaGang summarized the following points, the hope can help you:  

[Reinforcement method of steel column]  

Reinforcement column section, in steel structure processing general reinforcement column section with steel plate or steel, welding or bolt and the original column connected into a whole;  Add support, add support to reduce the column free length, improve the bearing capacity, improve the stability of the column in the case of the same section size;  Change the calculation diagram, reduce the column load or internal force;  The bearing capacity of steel column can be improved obviously by reinforcing the steel column with reinforced concrete.  

[Column unloading method]  

When the column needs to be strengthened or replaced under unloading condition, the method of "joist column replacement" is adopted.  If only the upper column needs to be strengthened in the steel structure processing, the crane beam bridge support can be used to lift the roof frame, so that the column is unloaded.  When the current part of the column is mainly strengthened or the process needs to cut off the lower column, a long-term joist can be set under the crane beam to share the load of the upper column (including the load of the crane beam) to the adjacent column, of course, this needs to check the adjacent column and reinforce.  

In using this method, consideration should be given to the fact that replacing the lower column with a joist will cause deflection that forces the original roof truss to sink, possibly damaging the joints of the members connected to the roof truss.  To this end, temporary load can be applied to the joist in advance, so that the joist has pre-deflection.  The order of this method is first to strengthen adjacent columns, welding joists and adjacent columns, adding temporary loads, welding joists and middle columns, unloading temporary loads, strengthening or cutting off the lower columns.  

[Column foot reinforcement method]  

If the thickness of the column foot plate is insufficient, the column foot stiffener should be added in the processing of steel structure to reduce the calculated bending moment of the bottom plate.  The bottom plate of the column foot is called a rigid block by pouring concrete in the column foot steel.  In order to increase the adhesion, the column foot surface paint and rust to be cleaned.  

When the concrete foundation is larger, this method can be adopted. The hole is drilled on the concrete foundation, the additional anchor is inserted, the epoxy mortar is poured, and the whole column foot is wrapped in reinforced concrete. The new steel bar should be extended into the foundation and welded with the original steel bar in the foundation.  

Through the above, we can understand some methods of steel column reinforcement in the processing of steel structure, so we should operate in place in the later use of the process, so as to ensure the effect of its firmness in the process of processing.