دورية أكاديمية
Study on the size effect of dynamic tensile strength in lightweight concrete using Leca aggregates at the mesoscopic level
| العنوان: | Study on the size effect of dynamic tensile strength in lightweight concrete using Leca aggregates at the mesoscopic level |
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| المؤلفون: | Bin Wang, Chunqi Zhu, Eryu Zhu, Zhu Zhang, Guosen Ji |
| المصدر: | Developments in the Built Environment, Vol 19, Iss , Pp 100487- (2024) |
| بيانات النشر: | Elsevier, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Engineering (General). Civil engineering (General) LCC:Building construction |
| مصطلحات موضوعية: | Lightweight aggregate concrete, Lightweight expanded clay aggregates, Dynamic hybrid fracture cohesive zone model, Static-dynamic size effect law, Aggregate volume fraction, Micromechanics, Engineering (General). Civil engineering (General), TA1-2040, Building construction, TH1-9745 |
| الوصف: | To investigate the influence of volume fraction of lightweight aggregate concrete on dynamic tensile strength and size effect, theoretical derivation and microscopic numerical simulation are combined in this study, and a dynamic hybrid fracture cohesive zone constitutive model for lightweight aggregate concrete to characterize the tensile behavior considering strain rate at microscopic scale. The research reveals that, for geometrically similar specimens of various sizes, the direct tensile strength with different aggregate volume fractions exhibits differing degrees of improvement with increasing strain rates. The tensile strength gradually decreases as volume fraction increases. The established coupling function incorporating strain rate, specimen size, and aggregate volume fraction accurately characterizes the dynamic tensile strength variation. In addition, a theoretical framework is proposed to provide a microscopic understanding of the static-dynamic size effect. This framework facilitates the estimation of the dynamic tensile strength under specific volume fraction, specimen size and strain rate conditions. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2666-1659 69298823 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2666165924001686; https://doaj.org/toc/2666-1659 |
| DOI: | 10.1016/j.dibe.2024.100487 |
| URL الوصول: | https://doaj.org/article/55e69298823340a8860e3677c73c1bb8 |
| رقم الأكسشن: | edsdoj.55e69298823340a8860e3677c73c1bb8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 26661659 69298823 |
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| DOI: | 10.1016/j.dibe.2024.100487 |