%0 Journal Article
	%A M. Tohidi and  J. Yang and  C. Baniotopoulos 
	%D 2014
	%J International Journal of Civil and Environmental Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 85, 2014
	%T An Improved Tie Force Method for Progressive  Collapse Resistance of Precast Concrete Cross Wall  Structures
	%U https://publications.waset.org/pdf/9997001
	%V 85
	%X Progressive collapse of buildings typically occurs 
when abnormal loading conditions cause local damages, which leads 
to a chain reaction of failure and ultimately catastrophic collapse. The 
tie force (TF) method is one of the main design approaches for 
progressive collapse. As the TF method is a simplified method, further 
investigations on the reliability of the method is necessary. This study 
aims to develop an improved TF method to design the cross wall 
structures for progressive collapse. To this end, the pullout behavior of 
strands in grout was firstly analyzed; and then, by considering the tie 
force-slip relationship in the friction stage together with the catenary 
action mechanism, a comprehensive analytical method was developed. 
The reliability of this approach is verified by the experimental results 
of concrete block pullout tests and full scale floor-to-floor joints tests 
undertaken by Portland Cement Association (PCA). Discrepancies in 
the tie force between the analytical results and codified specifications 
have suggested the deficiency of TF method, hence an improved 
model based on the analytical results has been proposed to address this 
concern.

 

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