- 劉偉揚1，龔順風1，徐銓彪2, 3，陳 剛2, 3，劉承斌1，樊 華4
引用本文摘 ? 要：為研究彈卡式連接預應力混凝土方樁在濱海環境下長期工作的耐久性能，對彈卡式連接與傳統焊接式連接方樁接頭試件進行了通電加速銹蝕試驗，并對劣化后兩種方樁接頭試件進行了抗彎性能試驗。結果表明：劣化后的彈卡式連接方樁接頭試件整體連接性能保持完好，其開裂彎矩和極限彎矩試驗值與樁身理論計算值較接近，試件受彎破壞形式為接頭底部被拉開，彈卡連接件中插桿從小套筒中拔出而破壞；劣化后的焊接式連接方樁接頭試件焊縫連接處銹蝕嚴重，其開裂彎矩和極限彎矩試驗值相較樁身理論計算值下降幅度較大，試件受彎破壞形式為接頭底部連接焊縫直接拉開，跨中接頭底部兩側端板完全脫離。 Abstract: In order to study the long-term durability of prestressed concrete square piles with resilient clamping connection in coastal environments, the accelerated corrosion tests were conducted on prestressed concrete square piles with resilient clamping connection and traditional welded connection, and the flexural performance tests of two kinds of square pile joint specimens were conducted. The results show that the overall connection performance of the deteriorated square pile joint specimens with resilient clamping connection remains intact and the test values of cracking moment and ultimate moment are close to the theoretical calculation values of the pile body. The flexural failure mode of the specimens is that the bottom of the connection joint is pulled apart, and the inserting rod in resilient clamping connector is pulled out from the small sleeve. However, the weld seam of the welded square pile joint specimens are corroded seriously. Compared to the theoretical values, the cracking and ultimate bending moment of the welded square pile joint specimens after corrosion deterioration are significantly reduced. The flexural failure mode of the specimen is that the connecting weld seam at the bottom of the joint is pulled apart, and the end plates on both sides of the bottom are completely separated.
劉偉揚,龔順風,徐銓彪,等.通電加速銹蝕后彈卡式連接接頭預制樁抗彎性能研究[J].混凝土與水泥制品,2021(5):33-38. LIU W Y,GONG S F,XU Q B,et al.Study on Flexural Performance of Prestressed Concrete Square Pile with Resilient Clamping Connection Joint After Electricity Accelerates Corrosion[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):33-38.