000019287 001__ 19287
000019287 005__ 20170118182308.0
000019287 04107 $$aeng
000019287 046__ $$k2017-01-09
000019287 100__ $$aPalermo, Dan
000019287 24500 $$aPerformance of Repaired Sma Shear Walls

000019287 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019287 260__ $$b
000019287 506__ $$arestricted
000019287 520__ $$2eng$$aSuperelastic Shape Memory Alloys (SMAs) are being explored as alternative reinforcing materials to traditional deformed steel reinforcement for seismic applications. The main advantage is the ability of the SMA to recover large nonlinear strains, which promotes the self-centering phenomenon. This paper presents the performance, before and after repair, of slender reinforced concrete shear wall reinforced internally with SMAs in the boundary zones within the plastic hinge region. The repair procedure included removal of damaged concrete within the plastic hinge region, followed by shortening of the SMA reinforcement in the boundary zones. The removed concrete was replaced with self-consolidating concrete, while the concrete above the plastic hinge region remained intact. The SMA reinforced concrete shear wall (before and after repair) exhibited stable hysteretic response with significant strength, and displacement and energy dissipation capacities. In addition, the walls exhibited pinching in the hysteretic response as a result of minimizing the residual displacements due to the restoring capacity of the SMA reinforcement. The results demonstrate that SMA reinforced components are self-centering, permitting repairing of damaged areas. Furthermore, the SMA reinforcement is re-usable given its capacity to reset to its original state. The length of the SMA bars in the original and repaired wall, in addition to the presence of starter bars in the original wall, were significant factors in the location of failure of the walls.

000019287 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019287 653__ $$aRepair; Shape Memory Alloys; Reinforced Concrete; Self-Consolidating Concrete; Shear Walls

000019287 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019287 720__ $$aPalermo, Dan$$iZaidi, Mohammed$$iDragomirescu, Elena
000019287 8560_ $$ffischerc@itam.cas.cz
000019287 8564_ $$s1105873$$uhttps://invenio.itam.cas.cz/record/19287/files/3304.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3304.
000019287 962__ $$r16048
000019287 980__ $$aPAPER