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(1 五邑大學(xué)土木建筑學(xué)院，江門 529020； 2 廣東七建集團(tuán)管樁基礎(chǔ)有限公司，江門 529000)
［摘要］介紹了預(yù)應(yīng)力高強(qiáng)混凝土管樁受彎性能試驗中的裂縫和撓曲變形等試驗現(xiàn)象，對裂縫出現(xiàn)的位置、發(fā)生的形態(tài)和裂縫數(shù)量的變化規(guī)律及撓曲變形的變化規(guī)律進(jìn)行了分析；對預(yù)應(yīng)力高強(qiáng)混凝土管樁的受彎性能進(jìn)行了初步總結(jié)，指出現(xiàn)行管樁規(guī)范關(guān)于構(gòu)件開裂彎矩和極限承載力的計算方法有待改進(jìn)，并提出了開裂彎矩和極限彎矩的修正建議計算表達(dá)式，計算結(jié)果與試驗實測結(jié)果吻合較好。
［關(guān)鍵詞］PHC管樁；受彎性能；裂縫；變形
Experimental research on the flexural behavior of prestressed high strength concrete pipe piles
Zeng Qingxiang1, Liang Huanhua2, Li Fayao2, Xiao Zhilan1, Zhu Zhenlin2, Dong Qinghua1(1 School of Civil Engineering and Architecture, Wuyi University, Jiangmen 529020, China；2 Pile Foundation Subsidiary of Guangdong No.7 Construction Group Ltd., Jiangmen 529000, China)
Abstract:The experimental phenomenon of the developing patterns on normal crack and flexural deformation of the prestressed high strength concrete (PHC) pipe pile specimens was introduced. The change laws of crack occurred position, crack developing, crack quantity and the flexural deformation were analyzed. The flexural behavior of PHC pipe piles were summarized. It is point out that the calculation methods on members cracking moment and ultimate bearing capacity of PHC pipe piles in code GB13476—2007 should be improved. A revised calculation formula for cracking moment and ultimate moment of PHC pipe piles is proposed.
Keywords:prestressed high strength concrete pipe pile; flexural behavior; crack; deformation
*江門市科技計劃項目，建設(shè)部研究開發(fā)項目(06-K1-34)，廣東省自然基金項目(07010874)，五邑大學(xué)科研項目。
作者簡介：曾慶響，
