{"title":"Determining the overstrength factor based on statistical values of European steel grades","authors":"Max Gündel","doi":"10.1002/cend.202000008","DOIUrl":null,"url":null,"abstract":"<p>In dissipative seismic design concepts, capacity design rules must be applied to control the plastic mechanism. For this purpose, nondissipative structural elements require an overstrength with respect to dissipative zones. The scattering of the yield strength of structural steel is considered in DIN EN 1998-1 by the material overstrength factor <span>\n <i>γ</i><sub>\n <i>ov</i></sub></span> with a recommended value of 1.25. However, current measurement data often show significantly higher yield strengths, especially for steel grades of a low nominal strength. In this article, new yield strength data of European steel grades are evaluated and compared with statistical values from the literature. A steel grade-dependent over strength factor was derived from a new probabilistic model for the yield strength, which has been included in the new German National Annex DIN EN 1998-1/NA:2018.</p>","PeriodicalId":100248,"journal":{"name":"Civil Engineering Design","volume":"2 1-2","pages":"20-28"},"PeriodicalIF":0.0000,"publicationDate":"2020-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cend.202000008","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Civil Engineering Design","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cend.202000008","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In dissipative seismic design concepts, capacity design rules must be applied to control the plastic mechanism. For this purpose, nondissipative structural elements require an overstrength with respect to dissipative zones. The scattering of the yield strength of structural steel is considered in DIN EN 1998-1 by the material overstrength factor γov with a recommended value of 1.25. However, current measurement data often show significantly higher yield strengths, especially for steel grades of a low nominal strength. In this article, new yield strength data of European steel grades are evaluated and compared with statistical values from the literature. A steel grade-dependent over strength factor was derived from a new probabilistic model for the yield strength, which has been included in the new German National Annex DIN EN 1998-1/NA:2018.
在耗散抗震设计概念中，必须采用容量设计规则来控制塑性机制。为此目的，非耗散结构元件需要相对于耗散区域的超强度。在DIN EN 1998-1中，结构钢屈服强度的散射由材料超强度因子γ ov考虑，推荐值为1.25。然而，目前的测量数据通常显示出更高的屈服强度，特别是对于标称强度较低的钢种。本文对欧洲钢新牌号的屈服强度数据进行了评价，并与文献中的统计值进行了比较。根据屈服强度的新概率模型推导出钢材等级相关的超强度因子，该模型已纳入新的德国国家附件DIN EN 1998-1/NA:2018。
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