Assessing energy absorption capacity of high-performance fiber-reinforced concrete in compression and bending

Abstract

This paper reports the energy absorption capacity of HPFRCs under compression and bending through an experimental investigation. There were four types of HPFRCs with different steel fiber types and volume contents as follows: no fiber, macro fiber 1.5%, micro fiber 1.5 %, and hybrid fiber including 1.0% macro fiber blended with 0.5% micro fiber. The macro fiber used in this research is hooked-end type with its a length of 35 mm and a diameter of 0.5 mm. The micro fiber used is smooth type with its a length of 13 mm and a diameter of 0.2 mm. According to the test results, the energy absorption capacity of HPFRCs containing steel fiber were enhanced clearly, in comparison to HPFRC with no fiber under both compression and bending. Besides, the HPFRC with hybrid fiber demonstrated the highest energy absorption capacity, in despite of the same fiber content of 1.5%.

Keywords: HPFRC; energy absorption capacity; compressive strength; bending strength