Numerical Analysis On Highway Slope Column Performance Of Passive Flexible Protection System

In recent years, a new SNS flexible protection technology gets more and morerecognition and application in a variety of engineering domestic hydropower, mining,railways, highways and other protective rockfall site. So far at home and abroad, theslope of disaster incidents continue to occur frequently following phenomena, namelypassive flexible protection system in the larger rock impact, or relatively large numberof landslides struck the steel rope, the steel columns under tremendous forces fromdifferent directions the twisting and bending deformation occurred, passive flexiblesystem greatly reduces the effective height, severely weakening the protection ofpassive safety systems. Therefore, we must replace the steel columns, then the systemwill inevitably produce heavy repair job and then spending large costs. This fatalweakness exposed, causing various concerns. How to improve their ability to resistexternal steel columns, thus ensuring passive safety system more flexible and moreeffective role of senior times, apparently became the problem in domestic andinternational research effort to overcome in the last ten years.In this paper, the slope of disaster events, SNS flexible protection system slopedeformation characteristics of the destruction of ordinary steel columns, steel columnssummarize common characteristics and causes deformation, on this basis, a newcross-section in the form of steel columns, that section is a square with a hollow circularhollow steel columns, a large number of papers under the premise of the referencemethods by ANSYS finite element analysis of three steel columns were compared andanalyzed by force, and verified computing. In order to better comparative analysis of theperformance difference between the three steel columns, steel columns article first tripleconducted comparative analysis of the performance of the two flexural modes; followedin the three twisted steel columns analyzed the performance of the final failure mode forsteel columns, has conducted a comparative analysis of buckling behavior. Two dataanalysis indicate that the flexural mode: In the same materials and the external force, themaximum displacement and the maximum stress better than ordinary steel columns andthe displacement of the hollow square hollow steel columns larger circular. In the caseof free torsion, the maximum shear stress than ordinary steel columns are hollow squarecross-section of the hollow steel columns with many large round steel columns; Inaddition, the hollow square steel column buckling mode of the first critical load of thehollow round steel columns than the average beam should be large. In short, in the caseof the same material, the performance of the hollow square steel columns and hollowround steel columns in torsional and flexural strength than ordinary steel columns in theanti-buckling performance is also better than ordinary steel columns. The aboveconclusion is built on the unique circumstances force model was out, and the otherbecause of the complexity of the problem, some issues have yet to be studied. Due to the fact that solid modeling complexity and steel columns in the SNSflexible protection system mainly play a supportive role, the paper lack of research onsteel columns dynamic anti-impact performance, with a focus on the mechanicalproperties of steel columns for a more comprehensive analysis, as well as steel columnswere analyzed for buckling behavior.