Calculation And Analysis Of Cross-section Stresses Of Steel Girders Under Acted Vertical Loads

Industrial buildings are being built with concrete columns and folding-line steel beams,along with light steel roofs.This type of design is becoming more and more common.These structures have the advantage of good beam bending resistance and lightweight.With the use of reinforced concarete columns,buildings can be equipped with lightweight masonry walls.This produces well-insulated buildings with durable walls.The use of lightweight,high-strength,easy to process and install steel beams and light steel roofing improves construction and reduces construction costs.However,the current building structure specification does not clearly stipulate the design,application,and stress characteristics of this new structural system,and this lack of specification poses difficulties for design and construction.Therefore,an accurate understanding of the mechanical properties of reinforced concrete column-folded line girder structural systems is an important issue that needs to be solved in the development of buildings in China The research of the reinforced concrete column-folded line steel girder structural system conforms to the national concept of "low carbon,energy saving and environmental protection" and has very important practical and strategic significance for the development of China's.Green building program.The in-depth study of the mechanical performance of the broken-line steel beam structural system is important for the use of these components.The premise domestic and foreign scholars have done some research on the concrete column-steel beam hybrid components.At present,scholars at home and abroad have done little research on the structure of zigzag steel beam structures.The calculation of the normal stress of the steel beam is a necessary for the design of the steel beam.This paper quotes uses the results of Zhang Zhixin and Huang Junchao's analysis of five different grades of broken-line steel beams in 2015 and the finite element simulation analysis of ANSYS.The normal stress state under the vertical load of hinged-folded steel girders at both ends was analyzed The specific research and analysis results are as follows:(1).Observe the normal section strain state during the test of the line-folded steel girder under concentrated load.Through the analysis,it is found that the cross-section strain state of the girder-folded steel girder under the concentrated load is similar to the linear change stress.The relationship basically accords with the flat section hypothesis.The mid-shaft position of the cross-section of the steel beam is different from that of the steel beam with no meandering straight line and is located below the center line of the cross-section.(2).Applying the research results of the existing horizontal steel wire beam thrust force,analyze the stress state of the curved line steel beam under vertical load from a theoretical point of view,through the analysis of the cross-section stress of three different parts of a line-shaped steel beam,the stress is found.The distribution state is basically consistent with the experimental analysis results.The location of the maximum normal stress is not necessarily the mid-span position,and the specific engineering design calculations must be paid attention to.(3).The finite element software ANSYS Workbench was used to establish an analysis model for the research and analysis platform.Simulation analysis was conducted.The strain state during the test experiment and the strain state analysis result of the theoretical analysis were compared,and a line-shaped steel beam conforming to the actual stress state was proposed.The calculation method of the normal stress in the section provides the basis for the design calculation of the line-shaped steel beam.