In order to study the interface bonding performance of concrete-filled aluminum tubular columns at room temperatures,three factors including concrete strength and component slenderness ratio were con-sidered.A bond-slip push-out test was conducted on concrete-filled aluminum tubular stub columns,and the load-slip correlation,and longitudinal strain distribution of aluminum tubes under different loads were obtained.The feasibility of existing constitutive models for bond-slip of concrete-filled steel tube columns in evaluating the peak bonding strength and residual bonding strength of concrete-filled aluminum tubular con-crete columns was analyzed.The research results indicated that the trend of the load-slip curve of each specimen was basically consistent;the longitudinal strain on the surface of the aluminum tube was propor-tional to its distance from the loading end,and the bonding stress was uniformly distributed within the inter-face length range;the decrease in concrete strength and interface bonding length would lead to a decrease in ultimate bonding strength and residual bonding strength,and the impact of concrete strength was greater.On this basis,a calculation formula for the interfacial bonding strength of concrete-filled aluminum tubular columns at room temperatures was proposed.
维普
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