圆钢管约束高强灌浆料局部冲切性能研究

发布时间：2019-06-08 14:17

【摘要】：以钢管混凝土暗柱连接节点为研究对象,通过试验研究和数值分析全面考察圆钢管约束高强灌浆料在局部冲切作用下的力学性能和工作机理。在试验的基础上,应用ABAQUS有限元软件,建立分段模型(Multi-Section Model简称"MSM"),对圆钢管约束高强灌浆料的6组试件进行了数值分析。将计算结果与试验结果对比分析,观察试件的破坏形态,并研究了冲切角、钢管高度、钢管壁厚和高强灌浆料强度等因素对试件极限承载力的影响。结果表明:试件沿冲切面,呈锥形破坏;数值模拟结果与试验结果吻合较好;增大钢管壁厚、灌浆料强度、钢管高度和冲切角均可提高极限承载力,其中冲切角的影响较为显著。
[Abstract]:Taking the joint of concrete-filled steel tubular dark column as the research object, the mechanical properties and working mechanism of high strength grouting material confined by circular steel tube under local punching and cutting are investigated through experimental study and numerical analysis. On the basis of the experiment, the piecewise model (Multi-Section Model referred to as "MSM") is established by using ABAQUS finite element software, and the numerical analysis of six groups of specimens with confined high strength grouting material for circular steel pipe is carried out. The calculated results are compared with the experimental results, and the failure patterns of the specimens are observed, and the effects of punching angle, steel pipe height, steel pipe wall thickness and high strength grouting material strength on the ultimate bearing capacity of the specimens are studied. The results show that the specimen is conical along the punching section, and the numerical simulation results are in good agreement with the experimental results. The ultimate bearing capacity can be increased by increasing the wall thickness of steel pipe, grouting strength, steel pipe height and punching angle, among which the impact of punching angle is more significant.
【作者单位】：华北理工大学建筑工程学院;唐山市绿色建筑产业技术研究院;
【基金】：国家自然科学基金资助项目(51278164) 河北省自然科学基金资助项目(E2014209221、E2015209020)
【分类号】：TU398.9

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