A novel concrete-filled flange steel tubular composite supports for tunnels: A numerical perspective

IF 6.6 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Case Studies in Construction Materials Pub Date : 2024-12-01 Epub Date: 2024-06-10 DOI:10.1016/j.cscm.2024.e03384

Dejun Liu , Xianda Feng , Kang Duan , Jianping Zuo , Guoliang Chen , Mingyao Li , Yongquan Chang , Zhiheng Xia

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Abstract

In this study, a new type of concrete-filled flange steel tubular composite support (referred to as a concrete-filled flange steel composite support) was designed to address the inadequate bending load-bearing performance of concrete-filled steel tubular supports. The bending load-bearing performance of concrete-filled flange steel tubular beams was studied through numerical simulations, revealing the improvement effect of welded T-section steel on the bending performance of the beams. The load-bearing characteristics of the concrete-filled flange steel composite and tubular supports were explored through theoretical analysis. Using a coal mine tunnel, the effectiveness of the concrete-filled flange steel composite support for controlling tunnel deformation was verified. The results indicated that the improvement in the bending load-bearing performance of concrete-filled flange steel tubular beams was mainly due to the bending load-bearing capacity of the T-section steel. Increasing the height of the T-section steel web effectively enhanced the bending load-bearing performance of the concrete-filled flange steel composite support when the same amount of steel was used, and the load-bearing performance of the concrete-filled flange steel composite support was significantly better than that of the traditional concrete-filled steel tubular support. With a lateral pressure coefficient farther from 1, the superiority was more pronounced.

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用于隧道的新型混凝土填充翼缘钢管复合支架：数值视角

本研究设计了一种新型混凝土填充翼缘钢管复合支撑（简称混凝土填充翼缘钢复合支撑），以解决混凝土填充钢管支撑弯曲承载性能不足的问题。通过数值模拟研究了混凝土填充翼缘钢管梁的弯曲承载性能，揭示了焊接 T 型钢对梁弯曲性能的改善作用。通过理论分析探讨了混凝土填充翼缘钢复合材料和管状支架的承载特性。利用煤矿巷道验证了混凝土填充翼缘钢复合支护在控制巷道变形方面的有效性。结果表明，混凝土填充翼缘钢管形梁抗弯承载性能的改善主要归功于 T 型钢的抗弯承载能力。在使用相同钢量的情况下，增加 T 型钢腹板的高度可有效提高混凝土填充翼缘钢复合支撑的抗弯承载性能，且混凝土填充翼缘钢复合支撑的承载性能明显优于传统的混凝土填充钢管支撑。当侧压力系数远离 1 时，其优越性更为明显。

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来源期刊

Case Studies in Construction Materials Multiple-

CiteScore

7.60

自引率

19.40%

发文量

842

审稿时长

63 days

期刊介绍： Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.