Rate-dependent tensile behavior of high performance fiber reinforced cementitious composites |
| |
Authors: | Dong joo Kim Sherif El-Tawil Antoine E Naaman |
| |
Affiliation: | (1) Department of Civil and Environmental Engineering, University of Michigan, 2350 Hayward, 2374 G.G. Brown Building, Ann Arbor, MI 48109-2125, USA |
| |
Abstract: | High Performance Fiber Reinforced Cementitious Composites (HPFRCC) show strain hardening behavior accompanied with multiple
micro-cracks under static tension. The high ductility and load carrying capacity resulting from their strain hardening behavior
is expected to increase the resisting capacity of structures subjected to extreme loading situations, e.g., earthquake, impact
or blast. However, the promise of HPFRCCs for dynamic loading applications stems from their observed good response under static
loading. In fact, very little research has been conducted to investigate if their good static response translates into improved
dynamic response and damage tolerance. This experimental study investigates the tensile behavior of HPFRCC using High strength
steel fibers (High strength hooked fiber and twisted fiber) under various strain rates ranging from static to seismic rates.
The test results indicate that the tensile behavior of HPFRCC using twisted fiber shows rate sensitivity while that using
hooked fiber shows no rate sensitivity. The results also show that rate sensitivity in twisted fibers is dependent upon both
fiber volume fraction and matrix strength, which influences the interface bond properties. |
| |
Keywords: | HPFRCC Rate sensitivity Twisted (Torex) fiber High strength hooked fiber Matrix composition Fiber volume fraction |
本文献已被 SpringerLink 等数据库收录! |
|