000205553 001__ 205553
000205553 005__ 20180913063005.0
000205553 0247_ $$2doi$$a10.1016/j.engstruct.2014.09.023
000205553 022__ $$a0141-0296
000205553 02470 $$2ISI$$a000346622500038
000205553 037__ $$aARTICLE
000205553 245__ $$aEffect of punching shear on load-deformation behavior of flat slabs
000205553 260__ $$aOxford$$bElsevier Sci Ltd$$c2014
000205553 269__ $$a2014
000205553 300__ $$a14
000205553 336__ $$aJournal Articles
000205553 520__ $$aPunching shear resistance usually constitutes the decisive design criterion for reinforced concrete flat slabs supported by columns. Modeling approaches based on Kinnunen and Nylander's rotation-symmetric sector model, such as the Quadrilinear Sector Model (QSM), allow the prediction of the slab's load rotation behavior. To take into account an orthogonal reinforcement layout, the steel Young's Modulus is usually reduced. A mechanically better justified flexural stiffness reduction factor is derived here which depends on the longitudinal reinforcement and modular ratio. The QSM also neglects shear deformations, which may reduce the flexural capacity. A Modified Sector Model (MSM) is derived which considers the influence of shear on the flexural behavior. A strength reduction factor for the shear crack-crossing longitudinal reinforcement is introduced which depends on the mechanical longitudinal reinforcement ratio. The factor takes into account that the longitudinal reinforcement also has to transmit forces resulting from shear. The MSM can also be applied to predict the load rotation responses and punching shear resistances of flat slabs strengthened with prestressed carbon fiber-reinforced polymer (CFRP) straps. (C) 2014 Elsevier Ltd. All rights reserved.
000205553 6531_ $$aReinforced concrete
000205553 6531_ $$aFlat slabs
000205553 6531_ $$aShear strength
000205553 6531_ $$aPunching shear
000205553 6531_ $$aYield-line theory
000205553 6531_ $$aCritical Shear Crack Theory
000205553 6531_ $$aSector model
000205553 6531_ $$aStrengthening
000205553 6531_ $$aCarbon fiber-reinforced polymers
000205553 6531_ $$aPrestressing
000205553 700__ $$0244451$$aKoppitz, Robert$$g206202$$uEcole Polytech Fed Lausanne, CCLab, CH-1015 Lausanne, Switzerland
000205553 700__ $$aKenel, Albin
000205553 700__ $$0240002$$aKeller, Thomas$$g121845$$uEcole Polytech Fed Lausanne, CCLab, CH-1015 Lausanne, Switzerland
000205553 773__ $$j80$$q444-457$$tEngineering Structures
000205553 909C0 $$0252002$$pCCLAB$$xU10234
000205553 909CO $$ooai:infoscience.tind.io:205553$$particle$$pENAC
000205553 917Z8 $$x121845
000205553 937__ $$aEPFL-ARTICLE-205553
000205553 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000205553 980__ $$aARTICLE