Computers and Concrete
Volume 25, Number 6, 2020, pages 517-523
DOI: 10.12989/cac.2020.25.6.517
Dynamic fracture catastrophe model of concrete beam under static load
Zhonggou Chen , Chuanqing Fu , Yifeng Ling , Xianyu Jin
Abstract
An experimental system on three point bending notched beams was established to study the fracture process of concrete. In this system, the acoustic emission (AE) was used to build the cumulative generation order (AGO) and dynamically track the process of microcrack evolution in concrete. A grey-cusp catastrophe model was built based on AE parameters. The results show that the concrete beams have significant catastrophe characteristic. The developed grey-cusp catastrophe model, based on AGO, can well describe the catastrophe characteristic of concrete fracture process. This study also provides a theoretical and technical support for the application of AE in concrete fracture prediction.
Key Words
concrete; damage; catastrophe model; grey-cusp theory; acoustic emission
Address
- Zhonggou Chen — School of Landscape Architecture, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
- Chuanqing Fu — College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310034, China
- Yifeng Ling — National Concrete Pavement Technology Center, Institute for Transportation, IA 50014, USA
- Xianyu Jin — College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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