基于ABAQUS的方钢管约束混凝土纯弯性能研究

ABAQUS-based Study on the Pure Bending Performance of Concrete Restricted by Square Steel Pipe

采用非线性有限元计算软件对方钢管约束混凝土纯弯构件进行了模拟分析,通过已有试验对有限元模拟结果进行了有效性验证。基于此,对方钢管约束混凝土进行了变参数分析,主要分析了混凝土抗压标准强度、钢材屈服强度以及钢管截面尺寸对抗弯承载力的影响,最后基于现有钢管混凝土纯弯理论,探讨了方钢管约束混凝土纯弯构件抗弯承载力的实用计算方法。

The bending member of concrete restricted by square steel pipe is simulated and calculated by application of non-linear finite element method. The simulating results are verified by the existing tests in term of validity. Based on these, the concrete restricted by square steel pipe is analyzed with variable parameters especially impacts on the bearing capacity against bending by the standard compressive strength of the concrete, the yield strength of the steel, and the steel pipe section. Based on the pure bending theory of concrete restricted by square steel pipe, finally, the practical calculation method for the bearing capacity of the pure bending member of the concrete restricted by steel pipe is explored.