Application Research Of Plane Column Network Layout Of L-shaped RC Frame Structure Based On Structural Continuity Collapse

Reinforced concrete frame structure is the most widely used structural system in our country,and its safety has been paid much attention by engineers.In the reinforced concrete frame structure,if the local component is destroyed by the accidental load,it is very easy to cause the whole continuous collapse of the structure,and cause great casualties and property losses.In this paper,the plane irregular L-RC frame structure is taken as the research basis,by changing the structure of planar grid layout to analyze structure progressive collapse resistance.The main conclusions of this paper are as follows:?Through the analysis of the sensitivity coefficients of the L shaped frame structure to be demolished column,sensitivity coefficient of the prism is maximum,showed that the effect on Progressive collapse resistance ability of structures from the prism is more obvious than other columns,which is more important in resistance progressive collapse of structures.?The results from PKPM,L-RC frame of six kinds of plane column layout form maximum inter story drift angle are less than the Limits specified by the specification 1/550,and the minimum maximum inter story drift angle is scheme six.The minimum Story drift ratio of the X direction is scheme one,its value is equal to 1.03,and the minimum inter story displacement ratio of the Y direction is scheme six,its value is equal to 1.18,which are less than the limit value specified by the specification not exceeding 1.2.That is to say,the model selected in this paper meets the requirements of specification and design,and has practical value.?the ability of resistance to progressive collapse from L-RC frame structure of six kinds of plane column layout form is analyzed by SAP2000 software,when the top prism of scheme one and three and the top and bottom prism of scheme two failed,their displacement values of them exceed the limits specified in the specification,so structure will undergo a continuous collapse failure.For the destroy of other assumed failure columns,the displacements of the failure nodes will appear in a gentle stage,that is to say,the structure will form a new equilibrium system after redistribution of internal force.?Based on the sensitivity coefficient of each component of the structure,compared the effect of six kinds of column arrangement form of structure progressive collapse resistance,L shaped frame structure in different corner column layout form on the order to improve the progressive collapse resistance of the structure:scheme six,scheme four,scheme five,scheme 1,scheme three,scheme two.So structure of the corner column along the two-way layout can effectively improve the structure of the progressive collapse resistance.