TY - JOUR
T1 - Numerical investigation on the behavior of FRP-retrofitted RC exterior beam-column joints under cyclic loads
AU - Dalalbashi Esfahani, A.
AU - Mostofinejad, D.
AU - Mahini, S.
AU - Ronagh, H. R.
PY - 2011
Y1 - 2011
N2 - This paper reports on the capability of nonlinear quasi-static finite element modelling in simulating the hysteretic behaviour of FRP-retrofitted reinforced concrete (RC) exterior beam-column joints under cyclic loads. For the purposes of our investigation, three concrete beam-to-column joint specimens (un-strengthened and FRP-strengthened) were selected. The ANSYS finite element software was used for modelling RC exterior joints. The specimens were loaded using a step-by-step load increment procedure to simulate the cyclic loading regime employed in testing. Additionally, an automatically reforming stiffness matrix strategy was used to simulate the actual seismic performance of the RC members after cracking, steel yielding, and concrete crushing during the push and pull loading cycles. The results show that the hysteretic simulation is satisfactory for both un-strengthened and FRP-strengthened specimens. Furthermore, when FRP strengthening is employed, strengthened beam-column joints exhibit a better structural performance than the un-strengthened specimens.
AB - This paper reports on the capability of nonlinear quasi-static finite element modelling in simulating the hysteretic behaviour of FRP-retrofitted reinforced concrete (RC) exterior beam-column joints under cyclic loads. For the purposes of our investigation, three concrete beam-to-column joint specimens (un-strengthened and FRP-strengthened) were selected. The ANSYS finite element software was used for modelling RC exterior joints. The specimens were loaded using a step-by-step load increment procedure to simulate the cyclic loading regime employed in testing. Additionally, an automatically reforming stiffness matrix strategy was used to simulate the actual seismic performance of the RC members after cracking, steel yielding, and concrete crushing during the push and pull loading cycles. The results show that the hysteretic simulation is satisfactory for both un-strengthened and FRP-strengthened specimens. Furthermore, when FRP strengthening is employed, strengthened beam-column joints exhibit a better structural performance than the un-strengthened specimens.
KW - beams
KW - finite element method
KW - joints
KW - reinforced concrete
UR - http://handle.uws.edu.au:8081/1959.7/uws:32677
UR - http://ijstc.shirazu.ac.ir/article_655_154.html
M3 - Article
SN - 1028-6284
VL - 35
SP - 35
EP - 50
JO - Iranian Journal of Science and Technology, Transaction B: Engineering
JF - Iranian Journal of Science and Technology, Transaction B: Engineering
IS - C1
ER -