The paper includes results from an experimental investigation held to understand the effect of the construction damages on the performance of reinforced concrete (RC) columns. It includes 11 specimens of square section (150x150x500 mm) of 24.37 MPa nominal concrete strength with 4 longitudinal steel bars of 8 mm (500 MPa nominal strength) with confinement ratio ωc=0.15. The casting procedure took place without all the necessary provisions defined by International Standards in order to create the construction damages. These damages are quantified and their effect on the load capacity of the concrete cores (sustained column) is calibrated trough a novel and simplified prediction model extracted by an experimental and analytical (F.E.A.) that included 6 specimens. It is concluded that: a) even with suitable repair, load reducrtion up to 1% is the outcome of the initial construction damage presence, b) the lower dispersion is noted for the section damage index proposed, c)extended damage alters the failure mode to brittle accompanied with longitudinal bars buckling.
The paper includes results from an experimental investigation held to understand the effect of the construction damages on the performance of reinforced concrete (RC) columns. It includes 11 specimens of square section (150x150x500 mm) of 24.37 MPa nominal concrete strength with 4 longitudinal steel bars of 8 mm (500 MPa nominal strength) with confinement ratio ωc=0.15. The casting procedure took place without all the necessary provisions defined by International Standards in order to create the construction damages. These damages are quantified and their effect on the load capacity of the concrete cores (sustained column) is calibrated trough a novel and simplified prediction model extracted by an experimental and analytical (F.E.A.) that included 6 specimens. It is concluded that: a) even with suitable repair, load reducrtion up to 1% is the outcome of the initial construction damage presence, b) the lower dispersion is noted for the section damage index proposed, c)extended damage alters the failure mode to brittle accompanied with longitudinal bars buckling.
Initial construction damage effect on the behaviour of reinforced concrete columns / Achillopoulou, Dimitra; Athanasios, Karabinis2. - ELETTRONICO. - (2014). ( 2 nd European Conference on Earthquake Engineering and Seismology Instabul 08/2014).
Initial construction damage effect on the behaviour of reinforced concrete columns
ACHILLOPOULOU, DIMITRA;
2014
Abstract
The paper includes results from an experimental investigation held to understand the effect of the construction damages on the performance of reinforced concrete (RC) columns. It includes 11 specimens of square section (150x150x500 mm) of 24.37 MPa nominal concrete strength with 4 longitudinal steel bars of 8 mm (500 MPa nominal strength) with confinement ratio ωc=0.15. The casting procedure took place without all the necessary provisions defined by International Standards in order to create the construction damages. These damages are quantified and their effect on the load capacity of the concrete cores (sustained column) is calibrated trough a novel and simplified prediction model extracted by an experimental and analytical (F.E.A.) that included 6 specimens. It is concluded that: a) even with suitable repair, load reducrtion up to 1% is the outcome of the initial construction damage presence, b) the lower dispersion is noted for the section damage index proposed, c)extended damage alters the failure mode to brittle accompanied with longitudinal bars buckling.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
