دانلود Nonlinear finite element analyses of FRP-strengthened reinforced concrete slabs using a new layered composite plate element

Abstract

A new layered 4-node, 24-degrees of freedom rectangular composite plate element is developed in this paper for nonlinear  finite  element  analyses  of  FRP-strengthened  RC  slabs.  The  layered  approach  is  used  to  form  an  integrated  plate  element  for  modelling  of  concrete,  FRP,  adhesive  layer  and  steel  reinforcement  with  a  perfect bond  assumption  between  each  layer.  Timoshenko’s  composite  beam  functions  are  employed  to  describe  the bending behaviour of the layered plate element and shear locking problem is avoided naturally. Geometrical and material  nonlinearities  are  both  included  in  the  new  plate  element.  The  proposed  element  is  simple  and  demonstrated to be accurate and efficient for analysis of the structural behaviour of FRP-strengthened RC slabs. Once validated, the new element is also employed to investigate the effects of parameters, including the types of FRPs and strengthening scheme on the structural behaviour of FRP-strengthened RC slabs.