TY -的A2 - Cai,鑫盟——刘崔克明盟——太阳,溪镇PY - 2021 DA - 2021/12/13 TI -钢管混凝土的承载力圆拱在六点均匀分布荷载及其工程应用SP - 8288648六世- 2021 AB -矢跨比的影响轴承性能的钢管混凝土(钢管)摘要研究了圆拱,三组钢管圆拱标本不同矢跨比(0.154、0.207和0.26)被选中,执行六点均匀分布载荷,轴承性能试验钢管圆拱与固定标本进行了结束。在这项研究中,极限承载力和变形破坏特征的钢管圆拱的标本。比较分析表明,钢管混凝土圆拱标本的变形演化经历了压实阶段,弹性阶段、弹塑性阶段,塑性阶段。在弹塑性和塑性变形阶段,圆拱显示良好的延性和承载力。圆拱的承载力明显受到矢跨比的影响。与圆拱标本矢跨比为0.154,标本的屈服载荷与0.207和0.26的矢跨比增加了50.8%和61.5%,和极限承载力提高42.7%和68.3%,分别。矢跨比越大,屈服载荷越大,试件的极限承载力和抗变形性越强的圆拱。抗弯强度的数值模拟过程中圆拱是由有限元分析提出钢管和核心混凝土的压缩破坏过程。仿真结果与实验结果有很好的一致性。实验和仿真结果表明,圆拱第一收益率在拱脚的内侧,和不同位置的曲率的标本不再是一致的。 When the ultimate bearing capacity is reached, the steel pipe at the arch foot obviously heaves, and the hooping effect of the steel pipe on the concrete is invalid. Based on the above research results, a closed composite support scheme of “bolt mesh shotcrete + vertical elliptical CFST support + steel fiber concrete shotcrete layer + reinforced anchor cable” was proposed for the extremely soft rock roadway and successfully applied in the Qingshuiying coal mine. SN - 1687-8434 UR - https://doi.org/10.1155/2021/8288648 DO - 10.1155/2021/8288648 JF - Advances in Materials Science and Engineering PB - Hindawi KW - ER -