仇建磊, 贡金鑫. 压弯剪作用下钢筋混凝土柱荷载-变形分析[J]. 工程力学, 2019, 36(10): 189-201. DOI: 10.6052/j.issn.1000-4750.2018.11.0584
引用本文: 仇建磊, 贡金鑫. 压弯剪作用下钢筋混凝土柱荷载-变形分析[J]. 工程力学, 2019, 36(10): 189-201. DOI: 10.6052/j.issn.1000-4750.2018.11.0584
QIU Jian-lei, GONG Jin-xin. LOAD-DEFORMATION ANALYSIS OF REINFORCED CONCRETE COLUMNS CONSIDERING AXIAL-FLEXURE-SHEAR INTERACTION[J]. Engineering Mechanics, 2019, 36(10): 189-201. DOI: 10.6052/j.issn.1000-4750.2018.11.0584
Citation: QIU Jian-lei, GONG Jin-xin. LOAD-DEFORMATION ANALYSIS OF REINFORCED CONCRETE COLUMNS CONSIDERING AXIAL-FLEXURE-SHEAR INTERACTION[J]. Engineering Mechanics, 2019, 36(10): 189-201. DOI: 10.6052/j.issn.1000-4750.2018.11.0584

压弯剪作用下钢筋混凝土柱荷载-变形分析

LOAD-DEFORMATION ANALYSIS OF REINFORCED CONCRETE COLUMNS CONSIDERING AXIAL-FLEXURE-SHEAR INTERACTION

  • 摘要: 为研究不同破坏模式下钢筋混凝土柱的受力机理及性能,该文提出能够考虑压弯剪相互作用的钢筋混凝土柱荷载-变形分析模型。以修正压力场理论及传统纤维截面分析法为基础,将柱受力过程分为弯曲控制及剪切控制两个阶段,分别对控制截面受拉区和受压区进行分析,同时考虑了纵筋受压屈曲及P-Δ效应的影响,进而得到柱水平受剪承载力及其变形。最后,为验证模型的有效性,对所收集的拟静力试验柱进行了模拟。结果表明,压弯剪作用下钢筋混凝柱会表现出弯曲、弯剪及剪切三种不同的破坏模式,其荷载-变形性能差异较大,采用该文所提模型所得计算曲线与试验结果吻合较好,该模型能够被用于钢筋混凝土柱抗震性能分析。

     

    Abstract: In order to study the load-bearing and performance of reinforced concrete columns with different failure modes, a load-deformation analysis model for reinforced concrete columns is proposed, considering the axial-shear-flexure interaction. Based on the modified compression field theory and the traditional fiber section analysis method, the whole loading process of the column is divided into two stages, i.e., bending-control stage and shear-control stage. The tension and compression zones of the control section are analyzed separately, considering the effect of compressive buckling of longitudinal reinforcement and the P-Δ effect, then the shear capacity and lateral deformation of the column are obtained. Finally, the collected pseudo-static test columns are simulated to verify the effectiveness of the proposed model. The results show that the reinforced concrete columns under axial-shear-flexure interaction will fail in three failure modes including flexural failure, flexural-shear failure and shear failure, the load-deformation performance of which varies greatly. The calculated curves obtained by the proposed model are in a good agreement with experimental results, so that the proposed model can be applied to analyze the aseismic performance of reinforced concrete columns.

     

/

返回文章
返回