Dynamic fracture catastrophe model of concrete beam under static load

Zhonggou Chen, Chuanqing Fu, Yifeng Ling and 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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