Web shear buckling of steel-concrete composite girders – advanced numerical analysis

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2024-11-05 DOI:10.1016/j.tws.2024.112671

Mehmed Numanović , Markus Knobloch

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Abstract

Load-bearing capacity of plate girders, often used in design of bridges and high-rise buildings, is limited by the shear capacity of connected slender plate elements subjected to shear buckling. To quantify this, experimental investigations on five large-scale steel and steel-concrete composite plate girders loaded solely in shear, with a minimal influence of bending moments, have been conducted and evaluated. In this paper, the phenomenon of web shear buckling is investigated within the numerical analysis using the ABAQUS Software. An advanced numerical model has been developed and results validated against existing experimental findings. One of the focal points of this study represents the methodology of developing such a comprehensive numerical model, implementation of suitable analysis procedures, material models, boundary conditions, finite elements and interactions, in order to correctly replicate the observed response in the tests. In addition, case studies tackling the influence of web slenderness, aspect ratio, initial imperfections, shear connection and concrete classes on the structural-mechanical behavior of steel-concrete composite girders in shear as well as the applicability and suitability of the existing analytical model are also presented and analyzed.

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钢-混凝土复合梁的腹板剪切屈曲--高级数值分析

板梁通常用于桥梁和高层建筑的设计，其承载能力受限于连接的细长板元件受剪屈曲的抗剪能力。为了量化这一点，我们对五种大型钢板梁和钢-混凝土复合板梁进行了实验研究和评估，这些板梁只承受剪力，受弯矩的影响很小。本文使用 ABAQUS 软件在数值分析中研究了腹板剪切屈曲现象。开发了一个先进的数值模型，并根据现有的实验结果对结果进行了验证。本研究的重点之一是开发这种综合数值模型的方法、实施适当的分析程序、材料模型、边界条件、有限元和相互作用，以便正确复制试验中观察到的响应。此外，还介绍并分析了腹板细长、长宽比、初始缺陷、剪力连接和混凝土等级对钢-混凝土复合梁在剪力作用下的结构-力学行为的影响，以及现有分析模型的适用性和适宜性。

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.