引用本文摘 ? 要：為研究竹節管樁的抗彎性能，以兩種樁型的竹節管樁為例，按樁身外徑計算得到了其開裂彎矩和極限彎矩，并進行了竹節管樁試件的開裂彎矩、極限彎矩、破壞特征及裂縫分布等抗彎性能試驗研究，對比分析了計算值和試驗值。結果表明：竹節管樁采用樁身直徑計算抗彎性能較合理，試驗值與理論計算值相比，極限彎矩的富余較大；竹節管樁的破壞形式為受拉區預應力鋼筋首先發生屈服，然后受拉區預應力鋼筋被拉斷，最后受壓區混凝土被壓碎；竹節管樁跨中截面應變分布基本符合平截面假定，豎向裂縫出現后截面中性軸上移，受壓區混凝土應變穩定增長。 Abstract： In order to study the flexural performance of the pretensioned spun nodular concrete pile, the theoretical cracking moment and ultimate bending moment of two types of piles were obtained with reference to the outer diameter of the pilet, and the experimental research on the flexural performance such as cracking moment, ultimate moment, failure characteristics and crack distribution were carried out. The results show that it is reasonable to use the diameter of the pile body to calculate the flexural performance of nodular concrete pile, and the surplus of the ultimate bending moment between the experimental value and the theoretical value is larger. The failure characteristics of nodular concrete pile are as follows: the prestressed reinforcement in tension zone yields first, the prestressed reinforcement in tension zone is broken, and finally the concrete in compression zone is crushed. The results conforms to the assumption of plane section. After the occurrence of vertical cracks, the neutral axis of the section moves up, and the strain of the concrete in the compression zone increases steadily.
陳克偉.先張法預應力混凝土竹節管樁抗彎性能試驗研究[J].混凝土與水泥制品,2021(7):33-37. CHEN K W.Flexural Performance Experiment of Pretensioned Spun Nodular Concrete Piles[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):33-37.