The Bonding Behaviour Between UHPC and Concrete Filled Steel Tubular with Different a/d Ratios and Shapes

Concrete Steel Filled Tubular (CFST) has been used throughout the decades in every construction especially in high-rise buildings, bridges, and huge infrastructures due to their advantages and economic benefits. As the modernization of the world has advanced, taller high-rise building and longer bridges are designed and desired to be built by all to keep up with the world’s population. Unfortunately, Concrete Steel Filled Tubular has a limited compressive strength. Thus, Concrete Steel Filled Tubular will fail when it is subjected to loads higher than its designed compressive strength. To overcome the flaw of conventional concrete, Ultra High-Performance Concrete Steel Filled Tubular (UHPCSFT) is then developed after Concrete Steel Filled Tubular (CFST) can no longer sustain the demands of the world