Experimental Study of Curved Concrete-Filled Steel Beams with Box-Sections Under the influence of Cyclic Loads
Authors
Abstract
In contemporary construction, curved steel tubular beams have emerged as a superior choice in structural systems for bridges and buildings, owing to their elevated compressive strength. This preference is particularly evident in applications involving curved bridge decks or scenarios where conventional formwork is impractical. This experimental initiative focuses on examining the ultimate strength of concrete-filled curved steel tubular beams. Three horizontally curved steel beams, featuring fixed connections, underwent testing with a monotonic applied load at mid-span.
The studied beams included curved steel hollow tubular beams (CTS), partially concrete-filled (CPTS), and fully concrete-filled (CFTS), all designed with a compressive strength of 30 MPa and identical span/radius of curvature ratios. The specimens measured 250×150×3 mm. Test results revealed that the load capacity of the rectangular CPTS beams increased by approximately 70% compared to their initial state. Impressively, the CFTS beams exhibited a remarkable 168% enhancement in load capacity. The introduction of concrete infilling significantly improved the flexural behavior and overall performance of the steel tubes.
The studied beams included curved steel hollow tubular beams (CTS), partially concrete-filled (CPTS), and fully concrete-filled (CFTS), all designed with a compressive strength of 30 MPa and identical span/radius of curvature ratios. The specimens measured 250×150×3 mm. Test results revealed that the load capacity of the rectangular CPTS beams increased by approximately 70% compared to their initial state. Impressively, the CFTS beams exhibited a remarkable 168% enhancement in load capacity. The introduction of concrete infilling significantly improved the flexural behavior and overall performance of the steel tubes.
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