Design of High-Performance Fiber Reinforced Concrete Via A Multiscale Approach
The meeting was held online at 9:00-11:00 am on March 18th, and was hosted by Zhong Jing from Harbin Institute of Technology.
Brief introduction of reporter
| Dr. Qian Zhang, an Assistant Professor at Department of Civil and
Environmental Engineering at FAMU-FSU College of Engineering,
Florida State University (FSU). Dr.Zhang obtained her Ma-ster of
Science and Ph.D degrees in Civil and Environmental Engineering
from University of Michigan, Ann Arbor, in 2010, and 2015, respec- tively. She has extensive research experience in de-sign, characteri- zation, and testing of concretematerials, multiscal-e modeling, and durability of concrete structures. She is also inte-rested in bio-based constuction materials, recycled materials, an-d additive construction. |
Brief introduction of the report
High performance fiber reinforced concrete materials (HPFRC) is a special family of concrete materials reinforced with short random synthetic or steel fibers, that features aductile strain-hardening behavior under flexure and tension with high post-cracking tensile strength and ductility accompanied by a multiple cracking behavior. The highly ductile behavior, high tensile strength and ductility, and self-controlled tight crack width leads to excellent structural performance and durability, and therefore, the material is extensively researched and implemented in civil infrastructures. The high perfonmance of HPFRC is achieved through systematic design of the material across different length scales guided by micromechanics, and the final performance of HPFRC structures are heavily influenced by factors across different length scales, such as fiber geometries and properties, fiber/matrix interfacial bond, fiber orientation and dispersion, structural geometry and reinforcement, etc. In this presentation, the design and application of HPFRC materials are discussed through a multiscale perspective. The micromechanics-based multiscale design framework of HPFRC is presented, and design of multi-functional HPFRC materials, HPFRC materials incorporating recycled materials, and influence of construction procedures are discussed.
