Stainless reinforced equal-strength replacement piers are used to solve the problems of steel corrosion, surplus strength, and resource waste for piers in marine environments. In this study, an ultrahigh drop weight impact test system was applied for a comparative experimental model of the horizontal impacts between two groups of stainless reinforced replaced concrete piers. The impact forces and displacements, strain time-history curves, crack propagations and distributions, and concrete damages, were analyzed during the experimental test. The results showed that the original specimen had consistent change trends with the stainless reinforced equal-strength replaced specimens in regard to maximum impact, steel bar and concrete strains, displacement peaks, and other aspects. Furthermore, under equal impact energies, the relative ratios were found to all range at 6 5%, and the fracture quantities and distributions, as well as the concrete damages, were approximately consistent. These research results will potentially provide technical support for the future designs of anti-impact stainless reinforced concrete piers.
KeywordsReinforced concrete piers, stainless-steel bars, equal-strength replacements, impact properties A number of serious ship-bridge collision events have occurred almost every year with the development of large bridges across rivers and straits. These ship-bridge accidents have caused severe casualties, property losses, and environmental damages. 1-4 Also, with economic developments and the deepening research regarding solutions to the problems of steel corrosion, an increasing number of important cross-sea bridges have utilized stainless-steel reinforcing bars to replace common reinforcements. [5][6][7] In current studies and engineering applications, uniform-section replacements are mainly adopted. However, considering that the strengths of stainless-steel reinforcements are much higher than normal, these methods have been found to display such problems as surplus strength and resource waste. This research study's aim was to apply stainless reinforcements to the equal-strength replacements of ordinary reinforcements in order to solve the problems of steel corrosion and surplus strength.In recent years, some researchers have conducted related theory and experimental studies on stainlesssteel reinforced concrete structures. The results indicated that the corrosion resistance of stainless-steel reinforced concrete is higher than that of ordinary