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(1 蘇州中材建筑建材設(shè)計(jì)研究院有限公司，蘇州215004； 2 中國(guó)建筑標(biāo)準(zhǔn)設(shè)計(jì)研究院，北京100048)

［摘要］計(jì)算預(yù)應(yīng)力混凝土管樁軸心受壓承載力時(shí)，應(yīng)考慮預(yù)應(yīng)力鋼筋產(chǎn)生的混凝土殘留預(yù)壓應(yīng)力影響，根據(jù)混凝土受壓時(shí)應(yīng)力-應(yīng)變的關(guān)系式及混凝土有效預(yù)壓應(yīng)力與管樁配筋率的函數(shù)關(guān)系，推導(dǎo)出管樁達(dá)到受壓極限時(shí)混凝土殘留預(yù)壓應(yīng)力與混凝土初始預(yù)壓應(yīng)力的關(guān)系，并給出了預(yù)應(yīng)力混凝土管樁軸心受壓承載力的計(jì)算式。

［關(guān)鍵詞］預(yù)應(yīng)力混凝土管樁;軸心受壓承載力;殘留預(yù)壓應(yīng)力

中圖分類號(hào)：TU473.1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)02-0113-03

Bearing capacity calculation of prestressed concrete piles under axial compression

Wang Qing1, Chen Lei1, Kuang Hongjie1, Yu Benying2

(1 Suzhou Sinoma Architecture & Building Materials Design Research Institute Co., Ltd., Suzhou 215004, China；

2 China Institute of Building Standard Design & Research, Beijing 100048, China)

Abstract:Bearing capacity calculation of prestressed concrete pipes under axial compression should consider the influence of concrete residual compressive prestress produced by prestressed reinforcement. According to the relation between stress and strain of concrete under axial compression and the functional relation between concrete effective compressive prestress and reinforcement ratio of piles, relation between concrete residual compressive prestress and concrete initial compressive prestress were derived when piles reach ultimate limit state. And calculation formulas of bearing capacity of prestressed concrete pipes were given.

Keywords:prestressed concrete piles; axial compression bearing capacity; residual compressive prestress

作者簡(jiǎn)介：王清，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:wangking@163.com。

參考文獻(xiàn)

［1］GB50010—2002混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社，2002.

［2］GB13476—2009 先張法預(yù)應(yīng)力混凝土管樁［S］.北京：中國(guó)標(biāo)準(zhǔn)出版社,2009.

［3］10G409 預(yù)應(yīng)力混凝土管樁［S］.北京：中國(guó)計(jì)劃出版社，2010.