Influence of infilled wall distribution on the load of progressive collapse resistance of RC frame structures
To investigate the effect of the infilled wall distribution on the load of progressive collapse resistance of reinforced concrete(RC)frame structures,integral finite element models of RC infilled wall structures were established based on ABAQUS,and the rationality of the modeling method and the selection of the constitutive relation were verified by comparison with experimental results.Furthermore,the load-displacement relationship,the relationship between the horizontal displacement of joints and the verti-cal displacement of columns,the distribution of plastic hinge and the peak load capacity of RC frame structures with different num-bers of infilled walls and distributions were analyzed.The results show that the infilled walls located at the failed column span can sig-nificantly improve the load of progressive collapse resistance of frame structures.The distribution of infilled walls will change the position of plastic hinges of the frame structures.Additionally,the more inhomogeneous the plastic hinge distribution,the weaker the progressive collapse resistance of structures.In architectural design,it is necessary to avoid the horizontal asymmetric distribu-tion of the infilled walls and the situation that the infilled walls are only distributed at both ends of the floor.
distribution of infilled wallsnumerical simulationRC frame structuresprogressive collapsespeak load
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