2-D meso-scale complex fracture modeling of concrete with embedded cohesive elements

Mingyan Shen, Zheng Shi, Chao Zhao, Xingu Zhong, Bo Liu and Xiaojuan Shu

Abstract

This paper has presented an effective and accurate meso-scale finite element model for simulating the fracture process of concrete under compression-shear loading. In the proposed model, concrete is parted into four important phases: aggregates, cement matrix, interfacial transition zone (ITZ), and the initial defects. Aggregate particles were modelled as randomly distributed polygons with a varying size according to the sieve curve developed by Fuller and Thompson. With regard to initial defects, only voids are considered. Cohesive elements with zero thickness are inserted into the initial mesh of cement matrix and along the interface between aggregate and cement matrix to simulate the cracking process of concrete. The constitutive model provided by ABAQUS is modified based on Wang

Key Words

concrete; complex fracture; meso-scale model; cohesive element; polygon aggregates

Address

Mingyan Shen: Hunan Provincial Key Laboratory of Structures forWind Resistance and Vibration Control & School of Civil Engineering, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, China Zheng Shi: Hunan Provincial Key Laboratory of Structures forWind Resistance and Vibration Control & School of Civil Engineering, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, China Chao Zhao: Hunan Provincial Key Laboratory of Structures forWind Resistance and Vibration Control & School of Civil Engineering, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, China; School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Ding No.11 Xueyuan Road, Haidian District, Beijing, China Xingu Zhong: Hunan Provincial Key Laboratory of Structures forWind Resistance and Vibration Control & School of Civil Engineering, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, China Bo Liu: School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Ding No.11 Xueyuan Road, Haidian District, Beijing, China; State Key Laboratory of Deep Geomechanics and Underground Engineering, No.16 Qinghua East Road, Haidian District, Beijing, China Xiaojuan Shu: Hunan Provincial Key Laboratory of Structures forWind Resistance and Vibration Control & School of Civil Engineering, Hunan University of Science and Technology, Taoyuan Road, Yuhu District, Xiangtan, China

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