255 / 2022-07-31 17:28:29

Eccentric Compressive Behavior of Circular Concrete-filled Steel Tubes with Internal Latticed Steel Angles

Eccentric compressive behaviour,Latticed steel angles,Ultimate load,Parametric analysis,Design equations

The eccentric compressive behaviour of the CFSTs with inner latticed steel angles was experimentally investigated, and test results such as the load-displacement curves, load-strain curves, distributions of the lateral deflection and ultimate load were obtained and analyzed. Test results showed that the influence of steel angles on the ultimate load was not obvious when the steel consumption was relatively small, and there was no obvious lateral deformation when the compressive load was smaller than 80% of the ultimate load. Corresponding finite element (FE) models were established and validated with the test results, and parametric analysis was conducted after the validation. Analysis results showed that the contribution of steel angles to the ultimate load would be reduced when the eccentric distance increases. Moreover, design equations for the ultimate load were proposed based on the FE results, and calculation results showed that the proposed design equations could conservatively and safely predict the ultimate load.