A new dynamic increase factor for nonlinear static alternate path analysis of building frames against progressive collapse

2013 ◽  
Vol 48 ◽  
pp. 666-673 ◽  
Author(s):  
Min Liu
Keyword(s):  
Path Analysis ◽  
Progressive Collapse ◽  
Building Frames ◽  
Dynamic Increase Factor ◽  
Nonlinear Static

Progressive Collapse Resistance of RC Structures with Tension Cables

2013 ◽  
Vol 405-408 ◽  
pp. 835-840
Author(s):  
Tie Cheng Wang ◽  
Zhi Ping Li ◽  
Hai Long Zhao
Keyword(s):  
Static Analysis ◽  
Progressive Collapse ◽  
Stable Condition ◽  
Frame Structure ◽  
Nonlinear Static Analysis ◽  
Force Model ◽  
Rc Structures ◽  
Concrete Frame ◽  
Collapse Resistance ◽  
Nonlinear Static

In this study, three tie force models of a 10-storey concrete frame structure were prepared to investigate the effects of these methods on the resistance of frame structures against progressive collapse. Four cases of different first-storey column removed were considered using nonlinear static analysis method and their performances were compared with each other. From the nonlinear static analysis, the tie force methods in DoD 2005 and DoD 2009 cannot improve progressive collapse resistance of the structure because horizontal cables don't play a full role. X-type tension cables provide alternative load paths after loss of a single column, and improve progressive collapse resistance of the structure. The X-type tie force model remained in stable condition after sudden removal of a corner column, an exterior column, or an interior column in the first storey.

Progressive Collapse Analysis of CFST Frame with Semi-Rigid Connection

2014 ◽  
Vol 578-579 ◽  
pp. 779-783
Author(s):  
Yang Ma ◽  
Lai Wang
Keyword(s):  
Progressive Collapse ◽  
Joint Stiffness ◽  
Static And Dynamic Analysis ◽  
Numerical Result ◽  
Collapse Resistance ◽  
Rigid Connection ◽  
Alternate Path Method ◽  
Nonlinear Static ◽  
Resistance Performance ◽  
Progressive Collapse Analysis

A finite element method was developed to investigate the semi-rigid connection mechanical behaviors in the process of CFST structures progressive collapse, and different semi-rigid connection joint stiffness were taken into consideration and compared to rigid connection. Nonlinear static and dynamic analysis were carried out with alternate path method. The numerical result shows that the increase of joint stiffness would evidently enhance the structural progressive collapse resistance performance, and CFST structures have excellent characteristic to prevent progressive collapse, the great deformation capacity and energy dissipation ability of semi-rigid connections are advantageous to progressive collapse resistance.

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