Hilton Hotel Building Progressive Collapse Performance Research For Lanzhou Center

In today's society,terrorist activities increasingly frequent natural disasters,increase the probability of the accident occurrence possibility of structure progressive collapse will be greatly increased.With the development of social economy,more and more high-rise buildings have been built,and the requirement of structural safety is higher and higher.The study of anti progressive collapse is becoming more and more important.At present,there are many researches on progressive collapse resistance of frame structures at home and abroad,but relatively few researches on reinforced concrete frame-corewall structures.Based on the background of Lanzhou Hilton Hotel,the finite element analysis model is established by PKPM,to determine the possible collapse of the possible,to calculate the bearing capacity of the beam under the condition may limit(flexural capacity,shear capacity),analyzed the linear static analysis and nonlinear static to collapse may by demolition by using the method of Midas/Gen software component.According to the design requirements of anti progressive collapse,the structure analysis,we draw the following conclusions:(1)The different positions of the column has been removed,the structure of progressive collapse resistance of different columns than peripheral edge column removal removal effect on structure,so the design should take the corner as an important member of the structure,strengthen the construction measures,at the same time with the increase of reinforcement ratio,hoop reinforcement and other measures to increase the bearing capacity of reinforced constraints the structure of the component.(2)Demolition of the different positions of the column,the column to be removed as the center,destroyed from the inside to the outside gradually decreases gradually decreases from the bottom to the top of the table,the largest of the cross out the failure effect,and on the other cross effect is relatively small.(3)After removing the frame column,the frame beam which is directly connected with the core tube can resist the progressive collapse,and can meet the requirement of the standard to resist the progressive collapse performance.(4)The column is removed,the surrounding frame is not strong enough to bear the shear capability,need to be properly on the increase.(5)Comparing the two analysis methods,it is easy to find that the conclusions obtained by the linear static analysis method are relatively conservative.The nonlinear static analysis method is less than the linear static analysis method,and the results obtained are relatively accurate.