کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
265705 504324 2016 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-level experimental approach for creep and shrinkage of high-strength high-performance concrete
ترجمه فارسی عنوان
آزمایش سه مرحله ای برای خزش و انقباض بتن با مقاومت بالا
کلمات کلیدی
بتن با کارایی بالا، خزش انقباض، آزمایش سه سطح، مدل پیش بینی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• Proposing a three-level experimental approach for creep and shrinkage of concrete.
• Grouping specimens on three levels: “material level”, “component level” and “structural level”.
• Obtaining modified creep and shrinkage models based on the three-level experiment.

Most of the existing prediction models for creep and shrinkage are established based on the statistical regression analysis of test data drawn mostly from experiments performed on normal-strength concrete, and they might not be as applicable to high-strength high-performance concrete. The prediction precision can be improved by carrying out on the given concrete short-term creep and shrinkage measurements. A three-level experimental approach for creep and shrinkage is proposed in this study. Take the high-strength high-performance concrete used in the auxiliary shipping channel bridge of Sutong Bridge for example, the detailed three-level experimental process and results were presented. The specimens were grouped on three levels: “Material level”, “Component level” and “Structural level”. On the first level, plain concrete specimens were experimented in a constant temperature and constant humidity room. On the second level, creep and shrinkage of reinforced concrete specimens with different reinforcement ratio were experimented. On the third level, the long-term behavior of a segmental concrete cantilever beam, 12.8 m long, under natural environment which was close to that of the actual bridge was studied. This experimental approach can provide a new train of thought to improve the predicted precision of the creep and shrinkage effects of the long-span concrete structures.

Technical route of three-level experiment.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 120, 1 August 2016, Pages 23–36
نویسندگان
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