不同截面形状钢管混凝土拱架的截面压弯特性

张尹; 李为腾; 杨博; 马海曜; 杨宁; 张玉华

不同截面形状钢管混凝土拱架的截面压弯特性

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出版历程
- 发布日期: 2018-01-19

Compression-bending Characteristics of Cross-sections of Concrete Filled Steel Tubular Arches with Different Cross-section Shapes

摘要

摘要: 目前巷道支护采用的钢管混凝土拱架的横截面形状有圆形、方形和D形。为掌握不同截面形状钢管混凝土拱架承载性能的差异，采用ANSYS对不同截面试件进行了压弯试验，统计分析了3种不同截面构件的压弯承载力。结果表明：随着偏心率增大，试件轴向抗压承载力降低，抗弯承载力提高；在截面含钢量及内部混凝土等级相同的情况下，圆形构件抗压弯承载能力最强，其极限弯矩分别是方形、D形正弯、D形反弯的1.3倍、1.65倍、2.8倍，其M-N曲线包络面积是后三者的1.44倍、1.83倍、2.75倍；截面形状对构件抗弯承载力的影响显著大于对抗压承载力的影响；D形截面构件压弯承载力受偏压方向影响明显，负偏压时承载力更低。
- 钢管混凝土 /
- 拱架 /
- 截面形状 /
- 压弯试验 /
- 数值模拟
Abstract: At present, the cross section forms of concrete-filled steel tubular arches which utilized in roadway support are mainly circle, square and D shape. To master the influence laws of different cross-sectional shapes on bearing property of concrete-filled steel tubular arches, compression-bending tests were carried out on specimens with different cross sections using ANSYS, and the compression-bending bearing property of three different cross sections of specimens were statistically analyzed. The results show that: with the increasing of the eccentricity, the axial compression bearing capacity reduced and the bending bearing capacity increased. The circular specimens have the best compression-bending bearing property, whose ultimate moment was 1.3 times, 1.65 times and 2.8 times as large as the tested members with square, circular, D shape, and reverse D shape, respectively; and the envelope area of M-N curve was 1.44 times, 1.83 times and 2.75 times as large as the above three shapes, respectively. The cross section forms had much more significant effects on the bending capacity than compressive capacity. Compression-bending bearing property of D shape was affected obviously by bias direction, and which was lower in reverse bending.
- concrete filled steel tube /
- support arch /
- cross-section shape /
- compression-bending test /
- numerical simulation

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