钢纤维混凝土框架节点抗震性能研究-土木工程·结构工程专业论文.docxVIP

青岛理工大学工程硕士学位论文摘要 青岛理工大学工程硕士学位论文 摘要 作为框架结构重要结构部位的节点区域不但起着传递和分配内力的作用，而且还对 保证框架结构的整体性发挥着重要作用。在外部荷载作用下，节点区域受力状态较一般 构件更为复杂，其破坏往往会导致整个框架倒塌。本文采用三维有限元方法，研究了钢 纤维高强混凝土框架节点的受力性能和耗能能力，为系统分析钢纤维高强混凝土框架节 点的力学特性提供了理论依据。 本文运用有限元程序ANSYS，建立了钢纤维高强混凝土框架边节点的三维实体单 元计算分析模型，探讨了钢纤维体积率和梁端钢纤维掺加范围对钢纤维高强混凝土框架 边节点受力性能的影响。计算结果表明：随着钢纤维体积率的增大，钢纤维高强混凝土 框架边节点的抗剪能力和耗能能力得到提高；随着梁端钢纤维掺加范围的增大，钢纤维 高强混凝土框架边节点的延性、抗剪能力和耗能能力有所降低。 本文的分析结果对于框架节点的抗震设计具有指导意义，也为进一步研究钢纤维混 凝土问题提供了理论参考。 关键词：框架节点；钢纤维；高强混凝土；有限元分析 I————一t,昌詈■—■———昌昌—鼍●■皇■暑詈暑詈皇 I————一t,昌詈■—■———昌昌—鼍●■皇■暑詈暑詈皇青岛理工大学工程硕士学位论文 AB STRACT As an important part of building structure，frame joint is not only the central hub of structure transfer and distribution internal force，but also plays all important role in keeping the structural integrity when structure goes into the elastic-plastic working period．The stress state ofjoint is more complex than the general components，its often lead to the whole frame collapsed．In order tO provide a theoretic basis for the steel fiber reinforced high strength concrete frame joints，the mechanical properties and the energy dissipation capacity of frame joints ate studied by use ofthe three-dimensional finite element method． This paper use ANSYS finite element method to establish the three·dimensional entity calculating model of steel fiber reinforced higll strength concrete flame joints，it discussed the influence of steel fiber volume ratio and steel fiber additional range upon the mechanical properties of frame joints．The result shows that，with the increase of steel fiber volume ratio， or谢Ⅱ1 the decrease of steel fiber additional range，the ductility,the shear capability and the energy dissipation capacity of frame joints also improves． The analysis results of this paper has certa．in guiding significance on the design of frame joint，and also provides theory preferenge‘for the further study and analysis of steel fiber reinforced concrete． K呵Words：Frame Joint；Steel Fiber；High Strength Concrete；Finite Element Analysis IIl 青岛理工大学工程硕士学位论