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（廣西科技大學(xué)土木建筑工程學(xué)院， 柳州 545006）

［摘要］部分外包鋼預(yù)應(yīng)力組合梁是一種預(yù)應(yīng)力新型結(jié)構(gòu)，在施加單調(diào)荷載條件下，對(duì)8根部分外包鋼預(yù)應(yīng)力組合梁進(jìn)行試驗(yàn)研究，其中1根為未施加預(yù)應(yīng)力的普通組合梁，7根為施加不同張拉控制應(yīng)力的部分外包鋼預(yù)應(yīng)力組合梁，通過(guò)變換預(yù)應(yīng)力大小來(lái)研究該類型組合梁承載力性能。結(jié)合理論分析、公式推導(dǎo)以及國(guó)內(nèi)外的研究文獻(xiàn)，計(jì)算并推導(dǎo)其構(gòu)件的承載力公式，對(duì)構(gòu)件的開(kāi)裂荷載、極限荷載進(jìn)行了詳細(xì)計(jì)算。其最終的理論計(jì)算值均與試驗(yàn)結(jié)果吻合良好，為該新型組合梁在實(shí)際工程中的應(yīng)用與推廣提供了理論基礎(chǔ)。

［關(guān)鍵詞］部分外包鋼預(yù)應(yīng)力組合梁； 預(yù)應(yīng)力； 開(kāi)裂荷載； 極限荷載

中圖分類號(hào)：TU378文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)23-0060-04

Test and research on design method of bearing capacity of  partially-encased steel prestressed composite beam

Zhang Peng, Shen Minhe, Deng Yu, Qin Xuansheng

(Department of Civil Engineering and Architecture， Guangxi University of Science and Technology， Liuzhou 545006， China)

Abstract:The partially-encased steel prestressed composite  beam is a new type of prestressed structure. Under the condition of monotonic loading, eight partially-encased steel prestressed composite  beams were tested. One of them was an ordinary composite beam without prestress force, and the other seven beams were a prestressed composite beam with different tension control stresses. The bearing capacity of this type of composite beam was studied by changing the prestress force. Combining with theoretical analysis, formula derivation and domestic and foreign research literature, the bearing capacity formula of the component was calculated and deduced, and the cracking load and ultimate load of the component were calculated in detail. The final theoretical calculation results were in good agreement with the experimental results, providing a theoretical basis for the application and popularization of this new composite beam in the practical engineering.

Keywords:partially-encased steel prestressed composite beam; prestress force; cracking load; ultimate load

*國(guó)家自然科學(xué)基金資助項(xiàng)目（51568008），廣西自然科學(xué)基金項(xiàng)目(2015GXNSFAA139263)，廣西科技大學(xué)研究生教育創(chuàng)新計(jì)劃項(xiàng)目（GKYC201814），2018廣西高校中青年教師基礎(chǔ)能力提升項(xiàng)目（2018KY0315）。

作者簡(jiǎn)介：張鵬，博士，教授，Email:gxutzp@126.com。