IMPACT DAMAGE BEHAVIORS OF THREE KINDS OF CONCRETE BRIDGE PAVEMENT MATERIALS
Impact damage behaviors of three kinds of concrete bridge pavement materials – Plain Concrete (PC), Steel Fiber Reinforced Concrete (SFRC) and Steel Fiber Reinforced and Polymer Modified Concrete (SFRPMC) are studied in this paper. By use of a Split Hopkinson Pressure Bar (SHPB), the dynamic responses of three kinds of concrete materials were investigated experimentally, the results show SFRPMC is more flexible and has better energy absorption ability than PC and SFRC. A linear visco-elasticity model concerning strain rate and damage is suggested to depict the impact damage behaviors of three kinds of materials; the simulation results showed the theoretical model could well describe the dynamic behaviors of the three kinds of materials. There exists a threshold damage value for concrete materials. Strain rate does great influent to damage evolution of PC and SFRC. But for SFRPMC, the influence of strain rate to damage is small and negligible. With the addition of steel fibers and polymer, the damage in SFRPMC is weaker than that in PC and SFRC under the same impact conditions.
Yiping Liu Liqun Tang Xiaoqing Huang
College of Traffic and Communications, South China University of Technology, Guangzhou, P R China, 510641
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）