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劲性混凝土结构是今后高层建筑应用的主要结构形式之一,然而目前对于这种结构的研究还不完善,为了对建筑用劲性混凝土梁柱节点受力性能有更深入的了解,需对其实现有限元分析。首先,利用位移有限元分析法对混凝土结构进行设定且将其离散为小单元等效系统,而单元集合形成原始结构,再建立每个组成单元的平衡方程,结合后引入混凝土和钢筋的非线性条件求解该方程,计算得出原始结构在离散点的未知量结果。其次,制作轴压比相同的两块混凝土试件,依据有限元分析通过反复低周荷载实验,分析两块混凝土试件的承载力、形态变化、耗能能力等方面对节点受力性能的影响。仿真实验证明,通过对设计的两块混凝土试件进行实验后得出结果与有限元分析计算结果较吻合。
The strong concrete structure is one of the main structural forms for the future high-rise buildings. However, the research on this structure is not perfect at present. In order to have a deeper understanding of the mechanical behavior of the reinforced concrete beam-column joints, Finite element analysis. Firstly, the finite element analysis of displacement is used to set the concrete structure and discretize it into small unit equivalent system, and the unit sets form the original structure, then establish the balance equation of each component unit, and then combine the concrete and steel bar Solving this equation with linear conditions yields the unknowns of the original structure at discrete points. Secondly, two concrete specimens with the same axial compression ratio were made. Based on the finite element analysis, the influence of the bearing capacity, the shape change and the energy dissipation capacity of the two concrete specimens on the mechanical behaviors of the joints were analyzed by repeated low-cycle loading tests . Simulation results show that the experimental results of two concrete specimens are in good agreement with the results of finite element analysis.