Abstract
At present, most of the research studies on the seismic performance of the durability degraded reinforced concrete structure only consider the influence of a single factor. This paper comprehensively considers the factors such as concrete carbonization, steel corrosion, and bond slip performance degradation caused by other durability factors and durability damage repair and studies the influence of the above factors on the seismic performance of bridge structures. Based on the finite element model considering the bond slip and the material parameters of time‐varying durability damage, the seismic performance analysis model of the pier is established considering material durability damage repair in different service periods. Then, the effect of material durability damage repair on the seismic performance of the pier is examined. The results show that the displacement of the pier top increases, the curvature of the pier bottom decreases, and the moment‐curvature curve pinching phenomenon is further evident when considering the bond slip. When considering the durability damage repair of materials, the curvature considerably decreases (the maximum value is approximately 16.04%) with the extension of the service time of the bridge, and the pier damage is substantially reduced.
Highlights
In recent years, the durability of existing bridges has become a research hotspot
With the extension of the service time of concrete bridges, concrete is carbonated by the influence of the surrounding air. e change in the chemical composition of the pore solution weakens the passivation and protection of steel bars
Most of the offshore bridges are under the conditions of the marine environment and warm climate. e high chloride ion concentration in air leads to serious corrosion of steel bars and the reduction of bond stress between steel bars and concrete
Summary
The durability of existing bridges has become a research hotspot. With the extension of the service time of concrete bridges, concrete is carbonated by the influence of the surrounding air. e change in the chemical composition of the pore solution weakens the passivation and protection of steel bars. E high chloride ion concentration in air leads to serious corrosion of steel bars and the reduction of bond stress between steel bars and concrete. Such phenomenon reduces the bearing capacity and durability of bridges and seriously affects the safety and seismic performance of bridge structures in the entire life cycle. Research on the seismic performance [18] of durable degraded reinforced concrete structures [19] mostly considers the single factor of steel corrosion or concrete carbonization. Advances in Civil Engineering model considering the factors of concrete carbonation, reinforcement corrosion, bond slip degradation, and material durability damage repair is established during the service life of the bridge. Advances in Civil Engineering model considering the factors of concrete carbonation, reinforcement corrosion, bond slip degradation, and material durability damage repair is established during the service life of the bridge. e influence of the above factors on the seismic performance of the structure or components under the offshore atmospheric environment is studied
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