Ahmed S. Elamary , I.A. Sharaky , Y. Alharthi , Man Zhou
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引用次数: 0
Abstract
In order to improve the local buckling resistance of the top flange in beams with corrugated steel webs (CSWs), it is common practice to use composite section with concrete slab over the top flange. In case of bare steel girder new techniques presented in this paper by encasing the CSWs with concrete, particularly in areas where the maximum flange outstanding lengths are present. This study examines the behavior of Partially Concrete-Encased CWs in prismatic I-beams (PCECWs) through experimental, theoretical, and finite element (FE) simulation. A new method is suggested in this study to strengthen the flexural zone of CSWs by introducing concrete in specific places. Initial tests were carried out on four specimens with different shear spans to analyze the beams' failure mode. The ultimate capacity of the bare steel specimens was compared with two different standards. Subsequently, FEMs were developed, considering material and geometric nonlinearity, and were validated using experimental data. Additionally, parametric studies were conducted on PCECWs with varying parameters. The results assured that incorporating concrete in both zones could significantly improve the beam's ability to withstand bending moments and shear forces with a load enhancement of 25 % over that of its bare beam. In contrast, the positioning of concrete in the combined of maximum shear and bending area only had a small effect on the ultimate capacity as the failure occurred in the pure bending zone. Furthermore, achieving the maximum flexural strength of PCECWs involves strategically placing concrete along the beam length rather than covering the entire length.
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.
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