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Early-Age Cracking Analysis of a HVFA Concrete Structure Based on Thermo-Hygro-Mechanical Modeling Combined with XFEM
المؤلفون المشاركون
Cui, Wei
Luo, Yanjun
Peng, Shuang
المصدر
Advances in Materials Science and Engineering
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-13، 13ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-01-08
دولة النشر
مصر
عدد الصفحات
13
الملخص EN
Due to the low hydration rate of high-volume fly ash (HVFA) concrete at early age, the temperature gradient between the concrete core and surfaces could be effectively reduced.
However, the low hydration rate results in a lack of hydration degree for early-age HVFA concrete.
Thus, during curing, compared to the strength of ordinary Portland cement (OPC), a subsequent lower one of HVFA concrete leads to a more sensitive response to inner stresses induced by thermal and moisture loads.
Based on ABAQUS, in this paper, user subroutines in the temperature and moisture fields were developed, with regard to the hydration degree, for simulation of the temperature and moisture influences on concrete.
Additionally, the Double Power Law (DPL) model was used to depict early-age deformations of concrete in the mechanical field.
Combined with the extended finite element method (XFEM), another subroutine for early-age cracking analysis in the mechanical field was then developed.
Together with aforementioned subroutines, a thermo-hygro-mechanical model is derived.
For evaluation of early-age cracking initiation and propagation of a pier composed of HVFA concrete, the model was implemented with XFEM.
The obtained results show that (1) temperature and restraints are the main causes of cracking; (2) moisture loss affects surface cracks on structures at early age; and (3) although the temperature difference between the core and surfaces is not much obvious due to the reduced rate of heat dissipation from hydration, cracking of early-age HVFA concrete is still likely to happen for its low early strength.
Thus, timely curing is critical to prevent early cracking.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Cui, Wei& Luo, Yanjun& Peng, Shuang. 2020. Early-Age Cracking Analysis of a HVFA Concrete Structure Based on Thermo-Hygro-Mechanical Modeling Combined with XFEM. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1128690
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Cui, Wei…[et al.]. Early-Age Cracking Analysis of a HVFA Concrete Structure Based on Thermo-Hygro-Mechanical Modeling Combined with XFEM. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1128690
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Cui, Wei& Luo, Yanjun& Peng, Shuang. Early-Age Cracking Analysis of a HVFA Concrete Structure Based on Thermo-Hygro-Mechanical Modeling Combined with XFEM. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1128690
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1128690
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
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