- 摘 要
-
（1 中國民航大學(xué)機(jī)場學(xué)院， 天津 300300； 2 河北工業(yè)大學(xué)土木與交通學(xué)院， 天津 300401）
［摘要］對PHC管樁和不同配筋強(qiáng)度比的PRC管樁進(jìn)行擬靜力試驗研究，并使用彈簧來模擬樁周土作用。參考天津濱海新區(qū)地質(zhì)條件設(shè)置彈簧參數(shù)，使之更符合實際的受力性能。分析試驗得到的滯回曲線、骨架曲線和耗能能力等來研究管樁在往復(fù)荷載作用下的抗震性能，找到非預(yù)應(yīng)力鋼筋和預(yù)應(yīng)力鋼筋的最佳配筋強(qiáng)度比。結(jié)果表明，PRC管樁滯回曲線更飽滿，延性更好；增加非預(yù)應(yīng)力鋼筋能改善PHC管樁延性，而非預(yù)應(yīng)力鋼筋配筋率過大也會造成混凝土在鋼筋屈服前被壓碎，非預(yù)應(yīng)力鋼筋和預(yù)應(yīng)力鋼筋的配筋強(qiáng)度比應(yīng)保持在0-4～0-8之間。
［關(guān)鍵詞］PHC管樁； PRC管樁； 抗震性能
中圖分類號：TU378文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)14-0113-04
Pseudo static test study on hybrid reinforced concrete pipe pile
Xu Jin1,2， Dou Yuanming2
(1 Airport College， Civil Aviation University of China, Tianjin 300300, China; 2 College of Civil and Transportation Engineering， Hebei University of Technology, Tianjin 300401, China)
Abstract:Pseudo static tests of PHC pipe piles and PRC pipe piles with different reinforcement ratios were carried out, and the spring was used to simulate soil action around piles. The spring parameters were set up according to the geological conditions of Tianjin Binhai New Area to make it more consistent with the actual mechanical performance. The seismic behavior of pipe pile under cyclic loading was studied by hysteretic curve, skeleton curve and energy dissipation capacity from the test, and the optimum reinforcement strength ratio of non-prestressing steel bar and prestressing steel bar was obtained. The results show that PRC pipe pile has fuller hysteretic curve and better ductility. Increasing the non-prestressing steel bar can improve the ductility of PHC pipe pile. The excessive reinforcement ratio of non-prestressing steel bar will also cause the concrete to be crushed before the steel bar yields. The strength ratio of non-prestressing steel bar and prestressing steel bar should be kept between 0-4~0-8.
Keywords:PHC pipe pile; PRC pipe pile; seismic behavior
*中央高?？蒲谢痦椖浚?122018D021）。
作者簡介：徐金，碩士，實驗師，Email:xujin1998@126.com。
