土木外文翻譯--高溫下鋼筋混凝土中鋼筋的性能-展示頁(yè)
2025-05-27 14:23本頁(yè)面
【正文】 eering profession to the possibility of connection failure under fire conditions [6]. In this study, S220 and S420 ribbed concrete steel rebars were subjected to 7 different temperatures to determine the high temperature behavior of reinforcement steels. 2. Experimental Study Experimental studies were conducted with 10 and 16?mm in diameter and 200?mm in length S220 and S420 reinforcement steel rebars. Test specimens 19 were subjected to 20, 100, 200, 300, 500, 800, and 950176。u and Cenk Karakurt. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract The deterioration of the mechanical properties of yield strength and modulus of elasticity is considered as the primary element affecting the performance of steel structures under fire. In this study, hotrolled S220 and S420 reinforcement steel rebars were subjected to high temperatures to investigate the fire performance of these materials. It is aimed to determine the remaining mechanical properties of steel rebars after elevated temperatures. Steels were subjected to 20, 100, 200, 300, 500, 800, and 9 5 0 ° C temperatures for 3 hours and tensile tests were carried out. Effect of temperature on mechanical behavior of S220 and S420 were determined. All mechanical properties were reduced due to the temperature increase of the steel rebars. It is seen that mechanical properties of S420 steel was influenced more than S220 steel at elevated temperatures. 1. Introduction Fire remains one of the serious potential risks to most buildings and structures. Since concrete is widely used in construction, research on fire resistance of 18 concrete bees more and more important. Many researchers all over the world have done some researches on this subject. The mechanical properties of all mon building materials decrease with elevation of temperature. The behavior of a reinforced concrete structure in fire conditions is governed by the properties of the constituent materials, concrete, and steel, at high temperature. Both concrete and steel undergo considerable change in their strength, physical properties, and stiffness by the effects of heating, and some of these changes are not recoverable after subsequent cooling [1]. It is necessary to have safe, economical, and easily applicable design methods for steel members subjected to fire. However, without fire protection, steel structures may suffer serious damage or even collapse in a fire catastrophe. This is because the mechanical properties of steel deteriorate by heat during fires, and the yield strength of conventional steel at 600176。 Accepted 31 March 2020 Academic Editor: Rajiv S. Mishra Copyright 169。 17 外文原文： Research Letters in Materials Science Volume 2020 (2020), Article ID 814137, 4 pages doi:Research Letter Properties of Reinforced Concrete Steel Rebars Expos
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