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The modified large diameter post tensioned prestressed concrete piles are a type of new tubular piles developed from the merits of PHC cylinder piles and large diameter prestressed concrete cylinder piles. In order to study flexural performance of the large diameter post tensioned prestressed concrete cylinder pile，bending tests of six large diameter post tensioned prestressed concrete piles are shown in this paper，and the cracking capacity and ultimate bearing capacity are attained. The results show that the flexural performance of large diameter post tensioned prestressed concrete pile is excellent and some suggestions are given about the bending test method.
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