Axial Performance of Steel Fiber-Reinforced Rubberized Concrete-Filled Circular Tubular Columns

Abstract

In order to study the axial performance of steel fiber-reinforced rubberized concrete-filled circular steel tubular columns, a total of 11 steel fiber-reinforced rubberized concrete-filled circular tubular columns are subjected to axial compression tests, considering the main parameters are rubber substitution rate, rubber particle size, steel fiber content, and concrete strength. The test results show that the use of rubber will reduce the bearing capacity of the columns but can increase the ductility of the columns. The smaller the rubber particles, the greater the reduction in the bearing capacity. The incorporation of steel fibers can increase the compressive strength of concrete, thereby improving the axial performance of the columns. The strength of concrete has the greatest influence on the columns, and the bearing capacity increases approximately linearly with the increase of concrete strength.