摘要
为保证施工安全、优化施工方案并提高施工效率,对筒仓结构液压滑模施工中支承杆的承载能力进行了研究。利用ANSYS有限元软件构建支承杆有限元模型,通过模拟分析不同混凝土荷载作用下支承杆的应力变化,研究在不同初始缺陷放大系数、长度、壁厚和材料强度条件下支承杆承载力的变化情况。结果显示:当混凝土荷载较小时,支承杆的应力较小,承载力较高;当荷载升至39kN时,支承杆出现应力集中现象,但并未失效,此时支承杆处于其极限承载能力范围内;初始缺陷会降低支承杆的极限承载力,尤其在受拉情况下,极限承载力的降低更为明显;当支承杆的长度增至4.0m时,其承载力达到峰值;当支撑杆的壁厚超过3.5mm后,承载力的提升不再显著;当材料强度超过345 MPa后,承载力的提升幅度较小,Q345钢是支承杆材料较为理想的选择,其承载力提升率最高。
To ensure construction safety,optimize construction plans,and improve construction efficiency,a study was conducted on the bearing capacity of support rods in hydraulic sliding mode construction of silo structures.Determine the basic situation of the studied silo structure,and then construct a finite element model of the supporting rod using ANSYS finite element software.By simulating and analyzing the stress changes of the supporting rod under different concrete loads,the variation of the bearing capacity of the supporting rod under different initial defect amplification factors,lengths,wall thicknesses,and material strength conditions is studied.The finite element simulation results show that when the concrete load is small,the stress on the supporting rod is small and the bearing capacity is high.When the load reaches 39 kN,stress concentration occurs in the supporting rod,but it does not fail,and the supporting rod is within its ultimate bearing capacity range.Therefore,initial defects will reduce the ultimate bearing capacity of the supporting rod,especially in tension,where the decrease in ultimate bearing capacity is more pronounced.Therefore,support rods with smaller defects should be selected during the construction process.When the length of the supporting rod increases to 4.0 m,its bearing capacity reaches its peak.When the wall thickness exceeds 3.5 mm,the increase in bearing capacity is no longer significant.When the material strength exceeds 345 MPa,the increase in bearing capacity is relatively small.Therefore,Q345 steel is an ideal choice as it has the highest increase in bearing capacity.
作者
孟文凯
MENG Wenkai(China Railway 18th Bureau Group Construction and Installation Engineering Co.,Ltd.,Tianjin Pilot Free Trade Zone(Airport Economic Zone),Tianjin 300450,China)
出处
《机械工程与自动化》
2026年第1期90-93,共4页
Mechanical Engineering & Automation
关键词
筒仓结构
液压滑模
支承杆
承载能力
ANSYS
silo structure
hydraulic sliding mold
support rod
carrying capacity
ANSYS
