000265168 001__ 265168
000265168 005__ 20190812204800.0
000265168 020__ $$a978-3-85748-163-5
000265168 037__ $$aCONF
000265168 245__ $$aStrengthening of steel beams using iron-based shape memory alloy (Fe-SMA) strips
000265168 269__ $$a2019-03
000265168 260__ $$c2019-03$$bIABSE$$aETH Zurich, Switzerland
000265168 300__ $$a8
000265168 336__ $$aConference Papers
000265168 520__ $$aThe current study presents a retrofit system, which can be used for strengthening of steel bridge beams using (un-bonded) mechanically-anchored iron-based shape memory alloy (Fe-SMA, ‘memory-steel’) strips. After anchoring, the Fe-SMA strips are activated by a heating and a subsequent cooling process. The anchorage system can simultaneously hold two strips (each with 50-mm width and 1.5-mm thickness) and transfer their prestressing force to the steel beam at the strip ends. The system is based on friction and does not introduce any damage to the parent metallic substrate. Owing to the so-called ‘shape memory effect’ (SME) of the alloy, the strips are prestressed after activation by heating up to a defined maximum temperature. After strengthening, the beam was statically loaded up to 60% of its yield capacity. Finally, in order to examine efficiency of the proposed SMA-strengthening solution, the steel beam was subjected to cyclic loading. The results of the static tests demonstrated the positive effects of the prestressed Fe-SMA strips on reducing tensile stresses in the beam bottom flange. Furthermore, the evolution of the prestress level in the strips during the fatigue loading was studied. The presented experimental study on the strengthened steel beam shows the effectiveness of un-bonded Fe-SMA strips as a retrofitting technique to enhance the static and fatigue performance of metallic bridge girders.
000265168 6531_ $$aIron-based shape memory alloy (Fe-SMA)
000265168 6531_ $$aShape memory effect (SME)
000265168 6531_ $$aActivation
000265168 6531_ $$aSteel structures
000265168 6531_ $$aPrestressed strengthening
000265168 6531_ $$aHigh cycle fatigue (HCF)
000265168 700__ $$aIzadi, Mohammadreza
000265168 700__ $$aGhafoori, Elyas
000265168 700__ $$g255250$$aHosseini, Ardalan$$0249524
000265168 700__ $$aMichels, Julien
000265168 700__ $$aMotavalli, Masoud
000265168 7112_ $$dMarch 27-29, 2019$$cGuimarães, Portugal$$aTowards a Resilient Built Environment - Risk and Asset Management, IABSE Symposium 2019 Guimarães
000265168 8560_ $$fardalan.hosseini@epfl.ch
000265168 909C0 $$pRESSLAB$$mdimitrios.lignos@epfl.ch$$0252555$$zPasquier, Simon$$xU10233
000265168 909CO $$pconf$$pENAC$$ooai:infoscience.epfl.ch:265168
000265168 960__ $$aardalan.hosseini@epfl.ch
000265168 961__ $$afantin.reichler@epfl.ch
000265168 973__ $$aOTHER$$rREVIEWED
000265168 980__ $$aCONF
000265168 981__ $$aoverwrite