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.
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The research described herein was sponsored by the National Science Foundation under Grants No. CMS 0408623 and 0530383. The opinions expressed in this paper are those of the authors and do not necessarily reflect the views of the sponsor.
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Kim, D., El-Tawil, S. & Naaman, A.E. Rate-dependent tensile behavior of high performance fiber reinforced cementitious composites. Mater Struct 42, 399–414 (2009). https://doi.org/10.1617/s11527-008-9390-x
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DOI: https://doi.org/10.1617/s11527-008-9390-x