论文部分内容阅读
纤维增强混凝土(FRC)具有受拉应变-硬化和多裂缝开展特性,替代普通混凝土作为梁柱节点核心区基体材料以减少箍筋的数量。该文通过建立协调方程、平衡方程和本构关系,对FRC梁柱节点在地震作用下的受力性能进行分析,提出FRC梁柱节点核心区剪应力-剪应变骨架曲线理论计算模型,并研究其开裂点、屈服点和峰值点的剪应力和剪应变计算方法。将理论计算结果与试验结果进行比较,结果表明:提出的剪应力-剪应变理论计算模型可以较好地反映FRC梁柱节点在地震作用下的剪应力-剪应变关系。
Fiber Reinforced Concrete (FRC) has tensile strain-hardening and multi-fracture development characteristics, instead of ordinary concrete as the core region of beam-column joints to reduce the number of stirrups. In this paper, through the establishment of coordination equations, equilibrium equations and constitutive relations, the mechanical behavior of FRC beam-column joints subjected to earthquakes is analyzed, and the theoretical calculation model of the shear stress-shear strain framework curve in the core of FRC beam-column joints is proposed. Its cracking point, yield point and peak point of shear stress and shear strain calculation method. The results of theoretical calculation and experimental results are compared. The results show that the proposed shear stress-shear strain theory model can well reflect the shear stress-shear strain relationship of FRC beam-column joints under earthquake action.