Analysis On The Progressive Collapse Of Reinforced Concrete Frame While Considering The Effect Of Infilled Wall

Building structure in the earthquake or accidental loading which partial easy to damage so the progressive collapse resistance of building structure is highly valued in the engineering field.The engineering staff mainly studied whether the building structure under the action of earthquake damage however,in China,it was late to research on the collapse of structural resistances and mainly focused on the research of pure concrete frame structure Infill walls as an almost indispensable part of the concrete frame structure,only considering the structural design loads and the concrete frame structure of the cycle reduction,without considering the effect of infilled walls on the collapse resistance of frame structures.Based on the comparison of the vertical displacement and beam and column internal force changes,contrasting the analysis results of pure frame structure without considering the infill walls with considering infill walls to study how the infilled walls of reinforced concrete frame structure act in progressive collapse.The main content of this paper is as follows:(1)Design a six-story reinforced concrete frame structure according to the relevant structural design specifications in china by using PKPM software,Then by using sap2000 software as a platform to establish a three-dimensional finite element analysis model?The alternate path method for linear static analysis of frame structure with infill walls,It can be concluded that in accordance with the pure frame structure design specification of our current has certain ability of resisting progressive collapse,the remaining structure collapses Only after the removal of the inner column,(2)For the pure frame structure,After the underlying column is removed nodes in vertical displacement failure were interior columns>long side column>short side column > corner column.When the inner column is removed,the vertical displacement of the joint continues to increase,and the remaining structure collapses.For the filled wall frame model,the displacement relation of the split column node is the same as that of the pure frame model,except that the vertical displacement of the node considering the effect of filling is obviously reduced.(3)By comparing the internal force time history curve of the beam and column,the internal force of the beam and column is less than the pure frame model,and the internal force time history curve is more stable,The demolition of the column closer to the beam and column internal force time history curve is far more obvious than the beam column,Therefore,it can be seen that the inertia produced after the removal of the column is basically reduced by the removal of the column as the center.(4)Considering the effect of the filling wall,it can not only reduce the vertical displacement of the joint,reduce the internal force of the beam and column,but also reduce the degree of plastic hinge development The filling wall can withstand the vertical load,so that the load can be passed through a wider range of other components,which can improve the collapse resistance of reinforced concrete frame...