Size-independent fracture energy in plain concrete beams using tri-linear model |
| |
Authors: | S Muralidhara BK Raghu Prasad BL Karihaloo RK Singh |
| |
Affiliation: | 1. BMS College of Engineering, Bangalore, India;2. Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India;3. School of Engineering, Cardiff University, Queen’s Buildings, P.O. Box 925, Cardiff CF24 OYF, UK;4. Reactor Safety Division, BARC, Mumbai, India |
| |
Abstract: | The boundary effect or the size effect on the fracture properties of concrete has been studied assuming a bi-linear model for the distribution of local fracture energy concept. Boundary effect is observed not only near the back boundary but also near the notch tip, where a fictitious boundary seems to exist, separating the linear and non-linear fracture zones. In this paper a tri-linear function is assumed for the local fracture energy distribution along the ligament and expressions relating RILEM fracture energy and the size-independent fracture energy are developed. Transition ligament length measurements based on the acoustic emission (AE) histogram of events are used to obtain size-independent fracture energy. Length of the fracture process zone is identified in the AE histogram and compared with the value obtained from softening beam model. There seems to be a good agreement between the results. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|