Testing, numerical modelling and design of S960 ultra-high strength steel welded T-section stub columns

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-08 DOI:10.1016/j.tws.2025.113267

Jinpeng Cheng , Yuyin Wang , Andi Su , Hua Yang , Ou Zhao

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引用次数: 0

Abstract

Ultra-high strength steel (UHSS) has been successfully gaining attention in the construction field because of its superior mechanical properties (e.g., a higher strength-to-weight ratio). However, the practical applications of 960 MPa UHSS remain limited, to some extent, because of the absence of the relevant design codes. To address this issue, this paper investigates the compressive characteristics of S960 UHSS welded T-section stub columns experimentally and numerically. The initial local geometric imperfection measurements and stub column tests were then carried out on all 10 specimens. Beyond the experimental work, numerical modelling for UHSS welded T-section stub columns was conducted virtually by means of finite element (FE) models. The validated FE models were subsequently utilized in the parametric analysis to generate a comprehensive database to supplement the test results, which are used to evaluate the applicability of the relevant design clauses in European, American and Australian codes. The results of the investigations showed that (i) the codified slenderness limits in the three design codes are applicable to the S960 UHSS welded T-section and (ii) the design rules specified in all the three codes can generally provide accurate and consistent predictions of the compression resistance for S960 UHSS T-section stub columns, but still yield some conservative results for slender sections.

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S960超高强度钢焊接t型钢短柱试验、数值模拟与设计

超高强度钢（UHSS）因其优越的机械性能（如更高的强度重量比）已成功地在建筑领域获得关注。然而，由于缺乏相关的设计规范，960 兆帕超高强度钢的实际应用在一定程度上仍然受到限制。针对这一问题，本文通过实验和数值计算研究了 S960 超高强度聚苯乙烯焊接 T 型截面短柱的抗压特性。然后对所有 10 个试样进行了初步的局部几何缺陷测量和短柱试验。除实验工作外，还通过有限元（FE）模型对 UHSS 焊接 T 形截面短柱进行了虚拟数值建模。经过验证的 FE 模型随后被用于参数分析，以生成一个全面的数据库来补充测试结果，用于评估欧洲、美国和澳大利亚规范中相关设计条款的适用性。研究结果表明：(i) 三种设计规范中编纂的细长度限制适用于 S960 超高强度聚苯乙烯焊接 T 型截面；(ii) 所有三种规范中规定的设计规则一般都能准确一致地预测 S960 超高强度聚苯乙烯 T 型截面桩柱的抗压性能，但对于细长截面仍会产生一些保守的结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.