Dynamic Mechanical Behavior of Concrete with Different Sizes of Interface Transition Zone

LIU Hai-Feng; WU Ping

doi:10.11858/gywlxb.2017.03.006

Volume 31 Issue 3

Apr 2017

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Chinese Journal of High Pressure Physics > 2017 > 31(3): 249-260.

LIU Hai-Feng, WU Ping. Dynamic Mechanical Behavior of Concrete with Different Sizes of Interface Transition Zone[J]. Chinese Journal of High Pressure Physics, 2017, 31(3): 249-260. doi: 10.11858/gywlxb.2017.03.006

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LIU Hai-Feng, WU Ping. Dynamic Mechanical Behavior of Concrete with Different Sizes of Interface Transition Zone[J]. Chinese Journal of High Pressure Physics, 2017, 31(3): 249-260. doi: 10.11858/gywlxb.2017.03.006

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Dynamic Mechanical Behavior of Concrete with Different Sizes of Interface Transition Zone

doi: 10.11858/gywlxb.2017.03.006

School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China

Received Date: 08 Jul 2016
Rev Recd Date: 19 Sep 2016

Abstract

Abstract

From a micromechanical point of view, concrete was considered as a three-phase composite composed of cement mortar, coarse aggregate and interface transition zone (ITZ) between them.In order to study the influence of ITZ on the dynamic mechanical behavior of concrete, we designed a two dimensional circular coarse aggregate random distribution program to simulate the dynamic failure process of concrete with different ITZ sizes, and analyzed the influences of the ITZ size, the specimen size, and the particle size and the volume fraction of coarse aggregate on the load-carrying capacity of concrete.Numerical simulation showed that the concrete with different ITZ sizes has an obvious size effect.The load-carrying capacity of the concrete with different ITZ sizes decreases with the size of ITZ.When the ITZ size and the particle size of the coarse aggregate are kept unchanged, the load-carrying capacity of the concrete increases at first and then decreases with the volume fraction of the coarse aggregate; when the minimum particle diameter of the coarse aggregate and the ITZ size are kept constant, the load-carrying capacity of the concrete increases at first and then decreases with the increase of the maximum particle diameter of the coarse aggregate.
- concrete,
- interface transition zone (ITZ),
- coarse aggregate,
- dynamic mechanical properties

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References(22)

References

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Dynamic Mechanical Behavior of Concrete with Different Sizes of Interface Transition Zone

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