Experimental Study And Analysis On The Eccentric Compression Behavior Of The Corroded H-shape Steel

With the steel structure applied more and more extensively in the engineeringconstruction field, many steel structures have suffered the corrosive problems. Thecorrosion of steel structures can not only cause waste of materials, but also decrease thedimension of component section and surface characteristics. The corrosion of steelcause the mechanical property change of steel structure material, such as intensity,plastic and so on, which will affect the serving steel structure bearing capacity andsafety. To study on corrosive steel structure bearing performance evolution, it can notonly reveal the potential danger in the steel structure construction, avoid the occurrenceof major accidents, but also provide the advice for identification of reinforcement steelstructure engineering and service life prediction.In this paper, uncoated Q235hot rolled H section steel was the object of study.And simulating atmospheric corrosion of nature through the atmospheric salt-fogaccelerated corrosion test.The three-dimensional non-contact optical profiler is used to acquire thethree-dimensional topography of the eight groups’ corrosion under different corrosiondegree. Use the software analysis function to obtain three-dimensional morphology andthe surface corrosion depth of each point. We can obtain the corrosion depth on thesurface of the structure of the distribution through the statistical analysis of thecorrosion depth of steel.Through the testing of15corrosive tensile specimens, it reveals the failure mechanism by exploring the effect of corrosion degree on material mechanicalperformance such as steel material strength, elastic modulus, elongation, etc.Based on5pillar of rust H eccentric compression experiment, it can reveal the extent of corrosionand degradation law of bearing capacity and damage mechanism of the eccentriccompression.In consideration of the change in steel structure section area, statistical natureparameter (mean value and standard deviation) of material intensity, it studies thereliable indicator evolution of corrosive steel compression-flexure member.