Corrosion effects on seismic capacity of reinforced concrete structures

Abstract

Recently, corrosion prevention and monitoring of reinforced concrete (RC) structures became an important issue for seismic assessment of such kind of structures. Therefore, it is important to develop adequate models to represent material degradation into seismic behavior simulation of RC structures. Because of its effects, corrosion represents the most important form of degradation for materials and structures, both for wide diffusion and the amount of danger it presents. To understand the corrosion process is critical in order to design RC structures that are able to guarantee the required service life and in order to understand the residual service life and strength of an existing structure. The seismic behavior of a corroded framed RC structure is analyzed by means of push-over analyses, which allow understanding the development of the global behavior of the structure. Three different degrees of corrosion penetration were simulated, by means of the reduction of bars and stirrups’ diameters and concrete cover cracking and spalling, and three different configurations of corrosion, depending on the number of corroded frames and sides of the structural elements.

Ultimate Flexural Capacity of Reinforced Concrete Elements Damaged by Corrosion

“…Only taking into account the degradation of the mechanical properties of reinforcements, the sectional capacity of any RC element appears significantly reduced in the time [40][41][42][43][44][45][46][47][48]. This aspect may significantly affect the seismic behavior of corroded structures [49][50][51][52][53][54]. Obviously, the decay may become more significant if the bond and cracking are also considered.…”

Experimental tests on corroded prestressed concrete beams subjected to transverse load

“…The corrosion of steel reinforcements in concrete is a long‐standing and global problem that has caused widespread damage to concrete structures . It is usually due to aggressive agents, such as chloride ions from marine environments, de‐icing salt, and chloride‐contaminated aggregates.…”

Ultimate Shear of RC Beams with Corroded Stirrups and Strengthened with FRP

“…The decay of structural performance occurs in many existing reinforced concrete (RC) structures due to reinforcement corrosion. It leads to the loss of the cross-sectional area of the steel bars, cracking of the concrete cover, and a damaging effect on the bond between steel bars and concrete [1][2][3][4][5].…”