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Material Testing and Evaluation of Steel Mechanical Properties for Classification of Steel Grade of Existing Civil Engineering Structure

机译：现有土木工程结构钢级分类钢力学性能的材料测试与评价

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The paper is generally focused on the determination and evaluation of yield and ultimate strengths of structural steels, not only current materials but also materials of existing steel structures when the properties are unknown and no material certificates exist. The attention is paid i.a. to the testing and evaluation of steel strengths, especially from the viewpoint of the statistical elaboration of material test results aimed to obtain strength values leading to the reliable structural design, in the meaning of general rules according to the European Standards for structural design of civil engineering constructions. The paper deals with actual yield and ultimate strengths obtained using material tests and with characteristic and design strengths based on the test results evaluation versus nominal and design strengths given by European Standards which are used for the structural design in the usual cases when steel grade is known. But in the case of existing structures, very often no information about the material exist that actual values of steel properties shall be determined using material tests and their statistical elaboration to obtain such values of steel properties which lead to the reliable structural design. However, approaches of the derivation of characteristic and design steel strengths using actual test results are principally different from the consideration of nominal and design steel strengths covered by the rules of the European Standards. This paper illustrates the evaluation of the results of material tests performed on the test specimens taken from the steel roof structure of the sport stadium almost 50 years aged, within the diagnostics of load-carrying steel structures of this building aimed to the evaluation of the existing construction.
机译：本文一般集中于结构钢的产量和极限强度的测定和评估，而不仅是当前材料，而且当物业未知而且没有材料证书时，现有钢结构的材料也是如此。注意力是支付的。对钢优势的测试和评估，特别是从统计制定材料测试结果的观点来看，旨在获得强度值，以获得可靠的结构设计，在一般规则的含义中，根据欧洲土木工程结构设计标准建筑。本文涉及使用材料测试获得的实际产量和最终优势，并根据欧洲标准的测试结果评估，具有欧洲标准的标称和设计优势，在钢材等级中用于结构设计的标称和设计强度。但在现有结构的情况下，通常不存在关于材料的信息，应使用材料测试和统计阐述确定钢属性的实际值，以获得钢质性能的这些值，这导致可靠的结构设计。然而，使用实际测试结果的特征和设计钢强度推导的方法主要与欧洲标准规则所涵盖的标称设计钢优势的考虑不同。本文说明了对从近50年所需的钢屋顶结构所采取的测试标本进行的材料试样的评估，该建筑载荷钢结构的诊断旨在评估现有的建造。

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