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The influence of the strain rate on the strength of concrete taking into account the experimental techniques

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EN
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Based on extensive literature review the behaviour of concrete under wide range of compressive and tensile strain rates is presented. The dynamic compressive strength of concrete can achieve the value of DIF (dynamic increase factor) equal about 3.5, and the dynamic tensile strength even 13. However, the strain rate response of concrete in tension and compression in all range of strain rate differs much. In compression strain rate sensitivity should be investigated in two domains, because of the shift of test results. The reason of division is probably connected with influence of the method of testing and especially with the specimen shape and size. The article presents also the strain rate sensitivity of new types of cement-based materials, like RPC, which appears not to differ much from the sensitivity of normal concrete.
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W artykule, w oparciu o szeroki przegląd literaturowy, przeanalizowano zachowanie betonu poddanego szerokiemu zakresowi ściskających i rozciągających szybkości przemieszczeń. Wytrzymałość betonu poddanego dynamicznym szybkościom przemieszczeń ściskających może osiągnąć 3.5-krotną wartość wytrzymałości statycznej. Dynamiczne szybkości przemieszczeń rozciągających mogą spowodować, że beton osiągnie aż 13-krotną wartość wytrzymałości statycznej. Jednakże odpowiedź betonu na szybkości przemieszczeń rozciągających znacznie się rożni od odpowiedzi betonu na szybkości przemieszczeń ściskających. Wrażliwość betonu na szybkość przemieszczeń ściskających powinna być rozważana w dwóch zakresach, ze względu na skok wyników badań. Przyczyna tego podziału jest prawdopodobnie związana z metodą badania, a w szczególności z wymiarami i kształtem próbek. W artykule zostały również przeanalizowane nowego typu materiały, takie jak RPC, których zachowanie okazało się nie odbiegać od zachowania betonu zwykłego.
Rocznik
Strony
77--86
Opis fizyczny
Bibliogr. 46 poz.
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autor
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL3-0026-0114
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