Experimental study on the flexural behavior of partially encased composite beams with corrugated steel webs

IF 2.1 4区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Advances in Structural Engineering Pub Date : 2024-03-23 DOI:10.1177/13694332241242974

Liusheng Chu, Xinwei Guo, Jie Li, Xiaomeng Xie, Danda Li, Xing Ma

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Abstract

Combining the advantages of partially encased composite structure (PEC) and corrugated steel web, a new type of composite PEC beam with corrugated web was proposed in this paper, namely corrugated webbed PEC (CWPEC) beam. In order to investigate the structural performance of the proposed CWPEC beams, four specimens were designed and fabricated. Four-point bending tests were carried out to study their flexural performance and failure modes. The failure process, load-displacement curve and strain distribution of the tested specimens were analyzed. Experimental results showed the high load carrying capacity and superior ductility of the proposed concept. Parametric study indicated that the concrete strength was increased from C30 to C50, the ultimate load slightly increased by 3.38%. The flange strength decreased from Q355 B to Q235, the ultimate load reduced by 9.17%. The flange width decreased from 250 mm to 200 mm, the ultimate load decreased by 22.21%. As comparison, the increase of steel flange width is more efficient to improve section moment capacity. Further analysis verified that the flexural strength of CWPEC beam was mostly provided by flanges with little contribution from the corrugated web. Finally, based on the quasi-plane assumption, prediction formulas for cracking moment and ultimate moment of CWPEC beams were proposed.

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带波纹钢腹板的部分包裹复合梁抗弯行为实验研究

本文结合部分包覆复合结构（PEC）和波纹钢腹板的优点，提出了一种新型波纹腹板 PEC 复合梁，即波纹腹板 PEC 梁（CWPEC）。为了研究拟议的 CWPEC 梁的结构性能，设计并制作了四个试样。通过四点弯曲试验研究了它们的弯曲性能和破坏模式。分析了试验试件的破坏过程、载荷-位移曲线和应变分布。实验结果表明，所提出的概念具有较高的承载能力和优越的延展性。参数研究表明，混凝土强度从 C30 提高到 C50，极限荷载略微增加了 3.38%。翼缘强度从 Q355 B 降至 Q235，极限荷载降低了 9.17%。翼缘宽度从 250 毫米减至 200 毫米，极限载荷降低了 22.21%。相比之下，增加钢材翼缘宽度能更有效地提高截面弯矩承载能力。进一步的分析证实，CWPEC 梁的抗弯强度主要由翼缘提供，波纹腹板的贡献很小。最后，基于准平面假设，提出了 CWPEC 梁的开裂弯矩和极限弯矩预测公式。

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来源期刊

Advances in Structural Engineering 工程技术-工程：土木

CiteScore

5.00

自引率

11.50%

发文量

230

审稿时长

2.3 months

期刊介绍： Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.