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Experimental study of shear behavior of high strength steel fiber reinforced concrete columns
Engineering Structures ( IF 5.6 ) Pub Date : 2021-04-27 , DOI: 10.1016/j.engstruct.2021.112329
Wisena Perceka , Wen-Cheng Liao

The ties configuration in accordance with every requirement of ACI 318-14 or newer for confinement and shear strength in a reinforced concrete (RC) column is strong required so that the RC column can dissipate seismic energy through flexural mechanism. In addition, according to ACI 318, the amount of confinement may increase as axial loading level increases. The increase of amount of confinement may lead to construction difficulties, particularly in column with small cross-section size; meanwhile, according to ACI 318, there is an upper limit for the transverse reinforcement in an RC column. An alternative material that has feasibility in substituting and reducing the traditional transverse reinforcement while maintaining shear strength and ductility is required. Application of short and discontinuous steel fibers to concrete element can be an alternative, since previous experimental results showed the improvement of shear strength, ductility, and toughness after adding steel fibers. However, no comprehensive experimental study of shear behavior of steel fiber reinforced concrete (SFRC) column with high strength concrete and steel reinforcing bars under different axial compression ratios subjected to lateral displacement reversals were available. In this study, large-scale double curvature SFRC columns with concrete strength design, yield strength for longitudinal reinforcement, and yield strength for transverse reinforcement, respectively of 70 MPa, 685 MPa (SD685), and 785 MPa (SD785) were prepared and tested.



中文翻译:

高强钢纤维混凝土柱抗剪性能的试验研究。

强烈要求符合ACI 318-14或更高版本中有关约束和抗剪强度的钢筋混凝土(RC)柱的结构,以便RC柱可以通过挠曲机制消散地震能量。另外,根据ACI 318,限制量可能会随着轴向载荷水平的增加而增加。限制量的增加可能会导致施工困难,特别是在横截面尺寸小的情况下;同时,根据ACI 318,RC柱中的横向钢筋有一个上限。需要一种替代材料,该材料在替代和减少传统的横向钢筋同时保持剪切强度和延展性方面具有可行性。将短而间断的钢纤维应用于混凝土构件可以是一种替代方法,因为先前的实验结果表明,添加钢纤维后,剪切强度,延展性和韧性得到了改善。然而,目前尚无关于高强度混凝土和钢筋在不同轴向压缩比下承受侧向位移反转的钢纤维增强混凝土(SFRC)柱的抗剪性能的综合实验研究。在这项研究中,准备并测试了具有混凝土强度设计,纵向钢筋的屈服强度和横向钢筋的屈服强度分别为70 MPa,685 MPa(SD685)和785 MPa(SD785)的大型双曲率SFRC柱。 。添加钢纤维后的延展性和韧性。然而,目前尚无关于高强度混凝土和钢筋在不同轴向压缩比下承受侧向位移反转的钢纤维增强混凝土(SFRC)柱的抗剪性能的综合实验研究。在这项研究中,准备并测试了具有混凝土强度设计,纵向钢筋的屈服强度和横向钢筋的屈服强度分别为70 MPa,685 MPa(SD685)和785 MPa(SD785)的大型双曲率SFRC柱。 。添加钢纤维后的延展性和韧性。然而,目前尚无关于高强度混凝土和钢筋在不同轴向压缩比下承受侧向位移反转的钢纤维增强混凝土(SFRC)柱的抗剪性能的综合实验研究。在这项研究中,准备并测试了具有混凝土强度设计,纵向钢筋的屈服强度和横向钢筋的屈服强度分别为70 MPa,685 MPa(SD685)和785 MPa(SD785)的大型双曲率SFRC柱。 。目前尚无关于高强度混凝土和钢筋在不同轴向压缩比下承受侧向位移的钢纤维增强混凝土(SFRC)柱抗剪性能的综合试验研究。在这项研究中,准备并测试了具有混凝土强度设计,纵向钢筋的屈服强度和横向钢筋的屈服强度分别为70 MPa,685 MPa(SD685)和785 MPa(SD785)的大型双曲率SFRC柱。 。目前尚无关于高强度混凝土和钢筋在不同轴向压缩比下承受侧向位移的钢纤维增强混凝土(SFRC)柱抗剪性能的综合试验研究。在这项研究中,准备并测试了具有混凝土强度设计,纵向钢筋的屈服强度和横向钢筋的屈服强度分别为70 MPa,685 MPa(SD685)和785 MPa(SD785)的大型双曲率SFRC柱。 。

更新日期:2021-04-28
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