Girders with corrugated steel web are preferred and widely used in recently constructed bridges and industrial buildings. Sandwich core girders with corrugated web are constructed by adding two plates (skins) to the corrugated web. This study aims to investigate the shear span-to-depth ratio impact on the performance of sandwich core steel girders with corrugated web. Three span-to-depth ratios (a/d): 1.0, 1.833 and 2.5, were examined. The test includes three girders with sandwich web thickness of 30 mm, three girders with 60 mm sandwich web thickness, and three girders with conventional flat webs. A total of nine simply supported steel girders subjected to a concentrated load were fabricated and tested up to failure. The responses of the examined girders are presented in term of the load deflection curves, the ultimate load, and the maximum displacement. Among the conclusions drawn in this study that girders with sandwich core thickness of 30 mm demonstrate higher ultimate load capacity than girders with sandwich core of 60 mm, the maximum difference in the ultimate load capacity was about 20% and can be seen at a/d equals to 1.0. The results also pointed out that the behavior of the beams was noticeably impacted by the shear span-to-depth ratio.
This paper presents applying gene expression programming (GEP) approach for predicting the punching shear strength of normal and high strength reinforced concrete flat slabs. The GEP model was developed and verified using 58 case histories that involve measured punching shear strength. The modeling was carried out by dividing the data into two sets: a training set for model calibration, and a validation set for verifying the generalization capability of the model. It is shown that the model is able to learn with high accuracy the complex relationship between the punching shear and the factors affecting it and produces this knowledge in the form of a function. The results have demonstrated that the GEP model performs very well with coefficient of determination, mean, standard deviation and probability density at 50% equivalent to 0.98, 0.99, 0.10 and 0.99, respectively. Moreover, the GEP predicts punching shear strength more accurately than the traditional methods. Ó 2014 Faculty of Engineering, Ain Shams University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
Last few decades, corrugated web steel girders have the foremost widespread and used steel constructions due to their lightweight and high load carrying capacity compared with the stiffened flat web. This study aims to comprise an experimental work by testing ten specimens to improve the girders shear resistance. One reference specimen with a flat web in addition to nine models that are categorised to three groups in which each group differs in the corrugation shape. Rectangular, trapezoidal and triangular corrugation shapes of different heights (20, 40, and 60 mm) were utilised. All specimens used in the study have equal weight, which is approximately 30 kilograms per specimen. The experimental work included measuring the ultimate load capacities and load-deflection curves. Results showed that different failure modes were observed for those beams. It was also found that the beam with trapezoidal corrugation web has an increase in its strength by nearly 28% compared with the reference beam.
This paper focuses on enhancing the shear strength of steel I-girder using different types of corrugation filled by concrete. This study used three types of corrugation shape (triangular, trapezoidal, and rectangular). Corrugation shapes had the same depth (60 mm). All specimens used in the study had equal weight, which is approximately (38) kilograms per specimen. The specimens were categorized into two groups, the first group without encasing by concrete while the second group contains self-compacted concrete to encase the corrugated steel web for two faces of I-girder. The experimental work included measuring the ultimate load capacities and load -deflection curves . The experimental results showed that the concrete filled corrugated web girders have high shear strength compared to the specimens that don’t have concrete encasing. Also, the shape of the corrugation was found to have an impact on the shear strength of the steel girders encased with concrete.
The experimental investigation was presented in this paper and the laboratory tests was performed on I-girders with honeycomb steel plate web HWG. The objective of the research was to estimate the shear behavior of the honeycomb steel plate web girders that subjected to one-point loading. Twelve simply supported specimens with differences in the web corrugations were divided into four groups, first one is the flat web FW while the others are the honeycomb webs HW. The honeycomb web classified with respect to the width of honeycomb cell which included; 60, 80 and 100mm. Also, each group with three samples which fabricated with a variable aspect ratio a/d; 1, 2 and 3. Tested under one concentrated load applied at mid-span of simply-supported girder. The results showed that, the honeycomb web with 60mm-thick and with aspect ratio a/d equal to 1, recorded a highest value in the ultimate load compared with flat web and with other samples of honeycomb web. Also, it was concluded that, thickness of steel plate, and corrugation dimensions of honeycomb web had great effects on the enhancement of web shear resistance.
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