Shape Memory Alloy Confined Concrete Under Cyclic Loading: Experimental Testing and Modeling


Abstract eng:
The idea of using shape memory alloy (SMA) spirals to apply active confinement to concrete prior to loading without the need for mechanical prestressing was first proposed in 2008 and previous studies show the promise of this new technique for seismic applications to significantly improve concrete strength and ductility. However, there is limited knowledge about the stress-strain behavior of SMA confined concrete and lack of robust analytical models that are able to predict three dimensional (3-D) behavior of concrete confined with SMA spirals under cyclic loading accurately. This research focused on addressing these knowledge gaps. A comprehensive experimental program is conducted on SMA confined concrete cylinders with different concrete strengths, spiral pitches and confining pressures to explore their effects on the stress-strain behavior of SMA confined concrete. Next, the experimental results are utilized to develop a new constitutive model for SMA confined concrete within the framework of Drucker-Prager plasticity model. The proposed constitutive model for SMA confined concrete is validated using experimental results. This model is able to take into account the unique behavior of SMA confined concrete, which involves a combination of both active and passive confinement, and is capable of simulating the 3-D stresses of SMA confined concrete.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



Record appears in:



 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 969.:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)