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Mathematical Problems in Engineering
Volume 2013, Article ID 562410, 7 pages
http://dx.doi.org/10.1155/2013/562410
Research Article

An Elastoplastic Damage Constitutive Model for Cementitious Materials under Wet-Dry Cyclic Sulfate Attack

College of Harbour, Coastal, and Offshore Engineering, Hohai University, Nanjing 210098, China

Received 7 February 2013; Revised 17 April 2013; Accepted 22 April 2013

Academic Editor: Irene Penesis

Copyright © 2013 Da Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The mechanical properties of cement mortars subjected to wet-dry cyclic sulfate attack were studied by the compression strength test. The results showed that the ultimate compressive strength increased with number of cycles at the initial stage. However, after a certain time, it started to decrease with further increases in the number of cycles. Moreover, the concentration of the sodium sulfate solution proved to be an important factor affecting the ultimate compressive strength. Based on continuum damage mechanics theory, an elastoplastic damage constitutive model is presented to describe the mechanical behavior of cementitious materials under compressive stress. The results obtained agree well with the experimentally observed elastic, plastic, and damage characteristics of cement mortars under compressive stress.