Add Web I-steel Skeleton Structure Anti-knock Performance Research Of Blast-resistant Doors

In nowadays, with the spreading of terrorism, world peace and development remain thetheme of the era, terrorist attacks caused great harm to society’s peace and tranquility. Withthe terrorist attacks continue to occur, an explosion posed a serious threat to people’s livesand property security. In architectural design, the blast-resistant performance of buildingshave gradually been listed as one of the design requirements. In recent years, theblast-resistant performance analysis of important buildings structure become a hot topic inengineering, researching impact load dynamic response has become an important issue. Theblast resistant doors as an important pedestrian location, can effectively resist explosive blastof personal attacks and to help people in time to safely escape. For the study of the doors hasgreat practical value.In this paper, it based joist steel blast-resistant door, proposing a blast-resistant doorwhich is by increasing belly web to enhance blast-resistant door performance. It mainly usedthe large software ANSYS/LS-DYNA. Numerical simulation analysis was carried out on thedoor. It respectively build I-steel skeleton blast-resistant door and add web I-steel skeletonblast-resistant door,finite element model. which are blast-resistant when the dragon skeletonbeam under the action of the doors and increase the web after doors. Throughing comparationto analysis the two blast-resistant doors after deformation, such as displacement、stress、strain、rigid velocity、acceleration、shear stress and total energy. It can be clearly drawn thatincrease the web after the doors have more secure and stable performance and overallperformance than the former.Analysising add web I-steel skeleton blast-resistant factors which affect blast-resistantdoor property. It reaches a conclusion that when panel thickness、belly board thickness、strength of materials and the equivalent distance is changed. Blast-resistant door property isdifferent. And give a contrast of parameters. It mainly include the following:(1) When the distance is equivalent is0.6、0.4、0.2, the displacement and stress ofblast-resistant door. When the distance is equivalent is0.2, the max displacement is5.362mm, which over allowable deflection and the max stress is439.7MPa, over material strength.blast-resistant door suffered serious damage.(2) To Q235steel, the biggest displacement under explosion load is0.9418mm, thebiggest stress under explosion load is110MPa. To Q345steel, the biggest displacementunder explosion load is0.8165mm. The displacement decline13%, the stress decline16.9%.(3) When the I-steel model is10、12.6、14, the biggest displacement of blast-resistantdoor respectively is0.9418mm、0.7126mm、0.5868mm, decline28.6%、45.1%. the biggestdisplacement of blast-resistant door respectively is110MPa、82.4MPa、55.8MPa, decline25.1%、49.3%. It easily find the I-steel model is more bigger, the displacement and stress ismore smaller, the blast-resistant door is more safe.(4) When the thickness of the panel is10mm、8mm、6mm, the biggest displacement ofblast-resistant door is respectively0.9418mm、1.1824mm、1.3104mm, decline25%、36.5%.the biggest stress of blast-resistant door is respectively110MPa、124.6MPa、145.5MPa,decline13.3%、32.3%.(5) When the thickness of the web is6mm、8mm、10mm、12mm, the biggestdisplacement of blast-resistant door is respectively1.4572mm、0.9418mm、0.5246mm、0.3226mm, the biggest stress of blast-resistant door is135.7MPa、110MPa、58.5MPa、25.9MPa. It find that increase the web thickness to improve anti-knock performance of theblast-resistant door.Lastly, simplifying calculate of the blast-resistant door and initially desive theblast-resistant door which is increased belly board.Through a large number of numerical simulation, research add web blast-resistant doorsabout the dynamic response and characteristics, and analysis the size of the influence factors.this paper has laid a solid foundation for later research work, provide some reference materialof antiknock under explosion impact load characteristics and dynamic response of theblast-resistant doors of explosion-proof design research.