Seepage dissolution effect prediction on aging deformation of concrete dams by coupled chemo-mechanical model
Seepage dissolution effect prediction on aging deformation of concrete dams by coupled chemo-mechanical model
复制标题
化学-力学耦合模型预测混凝土坝老化变形渗流溶解效应
DOI：
10.1016/j.conbuildmat.2019.117603
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发表时间：
2020-03
影响因子：
7.4
通讯作者：
Weiqiang Wang
中科院分区：
文献类型：
--
作者：
Erfeng Zhao;Chengqing Wu;Shaowei Wang;Jiang Hu;Weiqiang Wang
由于巨大的库水压力和混凝土的渗透性，混凝土坝会经历一个渗透溶解过程，这种溶解削弱了混凝土的力学性能，并产生一定的不可逆老化变形。本研究提出一化学-力学耦合模式，以预测渗透溶解对混凝土坝老化变形之影响。首次结合某混凝土重力坝长期使用性能的现场检测，探讨了弹塑性、化学损伤和机械损伤三者之间的相互作用。在此基础上，将渗流溶解损伤的老化模型数字化，并通过引入整体化学-力学损伤标量，提出了一种新的化学-力学耦合效应模型。以某重力坝为例，通过对其渗流溶蚀过程进行有限元模拟，并与实测资料进行对比，验证了模型的有效性。最后，将这些方法应用于某超高拱坝，定量计算了坝体随渗透溶蚀程度增加的不可逆时效变形。100年后拱坝年最大时效变形增加0.65mm。结果表明，该模型能有效预测混凝土坝长期运行过程中渗透溶蚀引起的老化变形。
Concrete dams undergo a seepage dissolution process because of huge reservoir water pressure and concrete permeability, and such dissolution weakens the mechanical properties of concrete and produces a certain amount of irreversible aging deformation. This study proposes a coupled chemo-mechanical model to predict the seepage dissolution effect on aging deformation of concrete dams. The interactions between elastic–plastic, chemical damage and mechanical damage are jointly explored combining with on-site inspection of long-term service performance of a concrete gravity dam firstly. Then an aging model of the seepage dissolution damage is digitized, and a novel model on chemo-mechanical coupled effect is put forward by introducing an overall chemo-mechanical damage scalar. The validity of the model is proved by a case study on the gravity dam through finite element simulation on its seepage dissolution and comparison with monitoring data. Finally, these methods are applied into an ultra-high arch dam to quantitatively calculate the irreversible aging deformation with the increase of the seepage dissolution degree. And the annual maximum aging deformation of the arch dam increases 0.65 mm after 100 years. The results indicate that the proposed model can effectively predict the aging deformation caused by the seepage dissolution during long-term operation of concrete dams.
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影响因子：
5.5
作者：
Ardito, R.;Maier, G.;Massalongo, G.
通讯作者：
Massalongo, G.
DOI：
--
发表时间：
2008
期刊：
Chinese journal of rock mechanics and engineering
影响因子：
--
作者：
Z. Chunsheng
通讯作者：
Z. Chunsheng
影响因子：
10.5
作者：
E. Rozière;A. Loukili
通讯作者：
E. Rozière;A. Loukili
DOI：
10.1080/19648189.2011.9695291
发表时间：
2011-01
影响因子：
2.1
作者：
S. Kamali-Bernard;F. Bernard
通讯作者：
S. Kamali-Bernard;F. Bernard
DOI：
10.1061/41141(390)6
发表时间：
2010-10
期刊：
--
影响因子：
--
作者：
Katie Bartojay;Westin T. Joy
通讯作者：
Katie Bartojay;Westin T. Joy