000202629 001__ 202629
000202629 005__ 20181203023637.0
000202629 0247_ $$2doi$$a10.1016/j.engstruct.2014.07.017
000202629 022__ $$a0141-0296
000202629 02470 $$2ISI$$a000342532700024
000202629 037__ $$aARTICLE
000202629 245__ $$aPunching shear strengthening of flat slabs using prestressed carbon fiber-reinforced polymer straps
000202629 260__ $$bElsevier$$c2014$$aOxford
000202629 269__ $$a2014
000202629 300__ $$a12
000202629 336__ $$aJournal Articles
000202629 520__ $$aAn experimental study of full-scale reinforced concrete flat slabs crosswise strengthened with prestressed carbon fiber-reinforced polymer (CFRP) straps against punching shear was performed. The effects of two strap anchoring systems and of slab thickness on punching behavior were compared. In one system the anchors were adhesively bonded to the concrete surface, while an external steel frame balanced the horizontal strap force components in the second system. Strap activation and thus strap force increments were higher in cases with either lower prestressing or higher strap stiffness. The deformability of the steel frame allowed a balancing of the strap forces. In the cases with steel frame, the friction bond between the steel anchors and the concrete surface reduced the concrete compressive zone. The system stiffness was thus increased and the rotation capacity reduced compared to the case with bonded anchors. The thickest slab exhibited a reduced rotation capacity and thus strap activation. The slab therefore failed at the lowest load increase, which however was still 67% above the theoretical resistance of the non-strengthened slab.
000202629 6531_ $$aReinforced concrete
000202629 6531_ $$aFlat slabs
000202629 6531_ $$aPunching shear
000202629 6531_ $$aCFRP
000202629 6531_ $$aPrestressing
000202629 6531_ $$aAnchorage
000202629 6531_ $$aDigital image correlation
000202629 700__ $$0244451$$g206202$$aKoppitz, Robert
000202629 700__ $$aKenel, Albin
000202629 700__ $$aKeller, Thomas$$g121845$$0240002
000202629 773__ $$j76$$tEngineering Structures$$q283-294
000202629 909C0 $$xU10234$$0252002$$pCCLAB
000202629 909CO $$particle$$pENAC$$ooai:infoscience.tind.io:202629
000202629 917Z8 $$x206202
000202629 937__ $$aEPFL-ARTICLE-202629
000202629 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000202629 980__ $$aARTICLE