Determination method of angle steel length of angle steel reinforced cracking box type steel column

Abstract

The invention relates to a determination method of angle steel length of an angle steel reinforced cracking box type steel column. The determination method comprises the following steps: taking the angle steel length as a parameter and setting one group of test pieces; carrying out non-linear buckling analysis on a component by utilizing finite element software ABAQUS; drawing a changing curve of a buckling ultimate load of a reinforced steel column along with the angle steel length; determining the angle steel length through a critical point of the curve; annularly buckling a cracking box type steel column on a column foot and a column top through groove type pieces, and reinforcing a middle part of the cracking box type steel column by adopting a manner of welding equal angle steel along four corners of the steel column. In a box type steel column reinforcing process, the bearing capacity of the box type steel column is easily insufficient when the angle steel is too short, concentration of welding stress is easy to cause when the angle steel is too long, and welding residual deformation becomes large; aiming at overcoming the disadvantages, the invention provides the determination method of the angle steel length, so that welding residual stress and residual deformation can be reduced and the bearing capacity of the reinforced box type steel column is satisfied; furthermore, the construction is convenient and the economical efficiency is relatively good.

Description

technical field [0001] The invention relates to the technical field of steel structure reinforcement, in particular to a method for determining the length of an angle steel for reinforcing a cracked box-shaped steel column with an angle steel. Background technique [0002] With the increasing demand for steel production in economic construction and the incentives and support of relevant policies in our country, steel structures have developed from being mainly used in the field of industrial plants in the past to now widely used in public buildings and civil buildings. In actual engineering, improper design, construction, use or management will cause the safety of existing buildings to fail to meet the code requirements, so the research on steel structure reinforcement technology is particularly important. [0003] At present, the steel structure reinforcement methods are mainly divided into three categories, one is to change the reinforcement of the structural force diagram...

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Problems solved by technology

Since the current reinforcement technology of steel columns mainly focuses on the reinforcement design of I-shaped steel columns, and there is little research on the reinforcement design of box-shaped steel columns, the values ​​of many reinforcement parameters in actual engineering operations are based on experience. , lack of theoretical basis

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