- 劉雨松1，陳 剛2,3，徐銓彪2,3，龔順風1，俞曉東4，劉承斌1
引用本文摘 ?要：為進一步推廣先張法預應力離心混凝土鋼絞線樁（PSC樁）在高烈度抗震區的應用，在PSC樁中加入與鋼絞線相同數量的螺紋鋼筋，研發了先張法預應力離心混凝土復合配筋鋼絞線樁（PSRC樁），并對3種規格共12根管樁試件進行了足尺抗彎及抗剪性能試驗，對比分析了PSC樁和PSRC樁在抗裂性能、抗彎（剪）承載力、變形能力及裂縫分布等方面的異同。試驗結果表明：非預應力鋼筋的配置對管樁抗裂性能影響不大，但可以提高管樁的抗彎和抗剪性能；PSRC樁的開裂彎矩和開裂剪力與PSC樁相近，但極限彎矩和極限剪力則分別提高了約55%和20%；與PSC樁相比，PSRC樁破壞時樁身裂縫數量較多，分布范圍較廣，但最大裂縫寬度較小。 Abstract: In order to further popularize the application of PSC piles in high intensity seismic areas, the same number of deformed steel bars as steel strands were added to PSC piles, and pretensioned centrifugal spun concrete piles with hybrid steel strands and reinforcing bars (PSRC piles) were developed. Through the bending and shear tests on twelve full-scale pile test specimens with three kinds of specifications, the differences of crack resistance, bending and shear bearing capacity, deformation capacity and crack distribution between PSC and PSRC piles were studied. The experiment results show that the arrangement of non-prestressing tendons has little effect on the crack resistance of piles, but can enhance the bending and shear bearing capacity. The cracking moment and shear force of PSRC piles are close to those of PSC piles, but the ultimate bending moment and shear force are about 55% and 20% higher, respectively. The non-prestressing tendons can also limit the crack development in pile body, the number of cracks for PSRC piles at failure is larger, the crack distribution is wider, but the maximum crack width is smaller.
劉雨松,陳剛,徐銓彪,等.復合配筋預制混凝土管樁的抗彎抗剪性能試驗研究[J].混凝土與水泥制品,2021(4):36-41. LIU Y S,CHEN G,XU Q B,et al.Experimental Study on Flexural and Shear Performance of Precast Concrete Piles with Composite Reinforcement[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):36-41.