Abstract
The use of stainless steel bars can improve the durability and sustainability of building materials. Through the static performance test, this research analyzes the failure pattern and bearing performance of bias stainless steel reinforced concrete (SSRC) column. The influence of reinforcement ratio of longitudinal bars and eccentricity on the mechanical performance of specimens was studied. Different constitutive models of stainless steel bars were used to calculate the ultimate bearing capacity of the section of the column under eccentric compression column. Based on the experimental results, a method to modify the expression of the design specification is proposed. And, the results were compared with the test results. The results showed that the damage patterns and failure modes of SSRC columns are essentially the same as those of traditional reinforced concrete columns. The bearing capacity of SSRC columns rises with the increase in the longitudinal reinforcement ratio, and the ductility of the specimens is enhanced. The ultimate load of the specimen decreases with the rise in eccentricity but the deflection increases gradually. The strain distribution of the mid-span section of the SSRC column conforms to the plane section assumption. The bearing capacity of the specimen can be analyzed by referring to the calculation method of the specification, and some parameters in the calculation formula of the specification are modified to adapt to the design and calculation of the SSRC column.
Highlights
Reinforcement corrosion problems commonly exist in the concrete structure’s durability, which lead to the unsustainability of construction projects. e investigation results show that more than 80% of concrete structures have a certain degree of durability problems or more serious steel corrosion just 5–10 years after construction [1]
The main measures taken to prevent the rapid corrosion of steel bars and improve the durability of reinforced concrete structures include [2,3,4,5] coating the surface of ordinary steel bars with antirust materials, using epoxycoated steel bars and hot-dip galvanized steel bars, controlling the quality of concrete, and using stainless steel bars
In order to fundamentally solve a series of problems caused by steel corrosion, the use of stainless steel bars is the first choice. e stainless steel reinforcement is an alloy steel and contains significant amounts of chromium in order to protect the steel against rust
Summary
Reinforcement corrosion problems commonly exist in the concrete structure’s durability, which lead to the unsustainability of construction projects. e investigation results show that more than 80% of concrete structures have a certain degree of durability problems or more serious steel corrosion just 5–10 years after construction [1]. In 1998, Bertolini et al conducted corrosion tests on SSRC members in high pH value and high chloride environment and found that the corrosion resistance of stainless steel reinforcement is extremely excellent. In 2002, Abreu et al used sodium chloride solution to simulate concrete pore fluid and used the EIS method and ZRA method to study galvanic corrosion behavior of the stainless steel bar and carbon steel bar. Younis et al conducted a life cycle cost analysis of high-rise buildings based on a 100-year study period and showed that the proposed combination using stainless steel bars had a life cycle cost (LCC) approximately 50% lower than the conventional combination (i.e., concrete containing fresh water, natural aggregate, and black steel) [40]. This paper will consider the SSRC columns as the research participants. rough testing, theoretical analysis, numerical simulation, and other technical methods, the mechanical performance of SSRC columns will be studied
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