Anti Disaster Ability Study Under The Effect Of Horizontal Load Of Potral Frame

In recent years, the light steel portal frame structure in China has been widely applied in the industrialbuilding. Lightweight steel portal frame structure due to its light weight, stiffness is relatively low, decidedits poor performance in resisting disaster, disaster load of earthquake and disaster and to occupy the mainposition, so the portal frame damage is the most important factor to horizontal load. Therefore, the lightsteel portal frame structure under horizontal load stress performance analysis has important significance.The first analysis in recent years the light steel portal frame was disaster damage type and damagemechanism, thought by the horizontal load in portal frame damage can be divided for the portal framestructure damage and portal frame structure damage two categories; introduced the finite element methodand the history of the development of computational analysis principle of finite element method, the lightsteel portal frame structure stress performance and ultimate bearing capacity analysis of the commonlyused method, is given by using finite element software portal frame structure ultimate load analysis offailure criterion; then by weakening the same degree of each member of a weakening of portal frame withultimate bearing capacity the reduction degree, to conclude that each member in plane frame structureimportant degree; joint stiffness of portal frames with the effect of play a decisive role, this paper analyzesthe different stiffness of portal frame of the ultimate bearing capacity, and gives the joint rigiditydistinguish range. On the space of portal frame of ultimate bearing capacity analysis of space frame, to getbeyond the loads and buckling modes; space portal frame in beyond the loads of the load displacementcurves of space; and the portal frame for side bar weaken, after the weakening of overall frame limitanalysis bearing capacity reduction, and the plane portal frame member after the weakening of the limitbearing capacity of the lower degree of contrast, the conclusion is consistent with the. Thus proposed indesign of gabled frame structure member importance coefficient.Finally, the portal frame reinforcement measures taken, at its nodes are axillary, in order to improvethe entire node stiffness, improve the whole door type rigid frame ’s limit bearing capacity; the threealgorithms are used to validate the haunched after ultimate bearing capacity increases with the degree, thefirst algorithm is a method for strength, second methods of using finite element software for analyzing theultimate bearing capacity of third is Zhu Yunpeng, the portal frame of axillary node test results were alsodrawn haunched portal frame limit bearing capacity has greatly improved, with haunched method to improve the limit of portal frame the bearing capacity is feasible.