000020316 001__ 20316
000020316 005__ 20170118182409.0
000020316 04107 $$aeng
000020316 046__ $$k2017-01-09
000020316 100__ $$aChen, Qiwen
000020316 24500 $$aShape Memory Alloy Confined Concrete Under Cyclic Loading: Experimental Testing and Modeling

000020316 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020316 260__ $$b
000020316 506__ $$arestricted
000020316 520__ $$2eng$$aThe 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.

000020316 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020316 653__ $$aShape Memory Alloys; Confinement; Concrete; Plasticity Model; Cyclic

000020316 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020316 720__ $$aChen, Qiwen$$iAndrawes, Bassem
000020316 8560_ $$ffischerc@itam.cas.cz
000020316 8564_ $$s1541193$$uhttps://invenio.itam.cas.cz/record/20316/files/969.pdf$$yOriginal version of the author's contribution as presented on USB, paper 969.
000020316 962__ $$r16048
000020316 980__ $$aPAPER