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首页> 外文期刊>Journal of structural engineering >Experimental and Numerical Investigations of S690 High-Strength Steel Welded I-Sections under Combined Compression and Bending
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Experimental and Numerical Investigations of S690 High-Strength Steel Welded I-Sections under Combined Compression and Bending

机译：S690高强度钢焊接I型切片实验性和数值研究组合压缩和弯曲

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This paper presents a comprehensive experimental and numerical investigation into the cross-section behavior and resistances of S690 high-strength steel welded I-sections under combined compression and bending moment. First, a testing program was carried out and included initial local geometric imperfection measurements and ten major-axis and minor-axis combined loading tests. The testing program was followed by a numerical modeling program, where finite-element models were developed and validated against the test results and then used to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions and loading combinations. On the basis of the test and numerical data, the codified interaction curves for S690 high-strength steel nonslender welded I-sections under combined loading, as used in Europe, Australia, and the US, were evaluated. The evaluation results revealed that (1) the European code yields accurate resistance predictions for S690 high-strength steel Classes 1 and 2 welded I-sections under both major-axis and minor-axis combined loading but underestimates the resistances for their Class 3 counterparts, (2) the Australian standard leads to a high level of conservatism for S690 high-strength steel nonslender welded I-sections under combined loading, and (3) the American specification can well predict the resistances for S690 high-strength steel nonslender welded I-sections under major-axis combined loading but results in conservative resistance predictions for those under minor-axis combined loading. The reliability of the codified interaction curves was also evaluated by means of statistical analyses. (C) 2021 American Society of Civil Engineers.
机译：本文介绍了在组合压缩和弯矩下的S690高强度钢焊接I段的横截面行为和电阻的综合实验和数值研究。首先，进行测试程序，包括初始局部几何缺陷测量和十个主轴和次轴组合的装载测试。测试程序之后是数值建模程序，其中开发了有限元模型并针对测试结果验证，然后用于执行参数研究以在宽范围的横截面尺寸和装载组合中产生进一步的数值数据。在测试和数值数据的基础上，评估了欧洲，澳大利亚和美国的组合负载下的S690高强度钢Nonslender焊接I段的编纂相互作用曲线。评估结果表明，（1）欧洲代码在主要轴和次轴组合负荷下为S690高强度钢等级1和2焊接I段产生精确的电阻预测，但低估了其3级同行的电阻， （2）澳大利亚标准在组合负载下的S690高强度钢NONSLENDES焊接I-Sections的高水平保守主义，（3）美国规格均可预测S690高强度钢NONSLENDED的电阻I-主要轴组合负荷下的段，但导致少轴组合负载下的保守阻力预测。还通过统计分析评估了编纂的相互作用曲线的可靠性。 （c）2021年美国土木工程师协会。

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