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（1北京市建筑工程研究院有限責(zé)任公司，北京100039；2北京建筑工程學(xué)院，北京100044）

[摘 要]  結(jié)合北京某多層磚混結(jié)構(gòu)房屋抗震加固工程，介紹了磚混墻體采用后張預(yù)應(yīng)力抗震加固新技術(shù)的工程應(yīng)用。并進(jìn)行了八片試驗(yàn)墻體在水平低周反復(fù)荷載下的試驗(yàn)研究，對(duì)比分析了未加固墻體與加固墻體的破壞形態(tài)和受力特點(diǎn)。研究結(jié)果表明，后張預(yù)應(yīng)力加固磚砌體墻體可以顯著提高墻體的延性和抗剪承載力，改善破壞形態(tài)。

[關(guān)鍵詞]  后張預(yù)應(yīng)力；加固；磚墻；試驗(yàn)；施工工藝

中圖分類號(hào)：TU398⁺.5          文獻(xiàn)標(biāo)識(shí)碼：A         文章編號(hào)：1002-848X（2013）S1-1412-05

*北京市科技計(jì)劃項(xiàng)目（D131100003713003）

作者簡(jiǎn)介 ：華少鋒，碩士研究生，Email：huashaofeng@163.com。

Research and application on seismic behaviors of a multistory brick building retrofitted with post-tensioned tendons

Hua Shaofeng^1,2, Liu Hang¹

(1 Beijing Building Constructing Research Institute, Beijing 100039, China; 2 Beijing University of Civil Engineering and Architecture, Beijing 100044, China)

Abstract: The application of the new seismic retrofitting technology of using post-tensioning tendons to retrofit brick wall structures was presented according to a seismic retrofitting project of multistory brick building in Beijing. Meanwhile, eight brick walls retrofitted with post-tensioned tendons were tested under lateral low-cyclic reversed load. Mechanical behaviors and failure modes of the seismically retrofitted brick walls using post-tensioning were compared to the response of a non-retrofitted brick wall. It could be found that the ductility and the shear capacity of the brick wall retrofitted using post-tensioned tendons could be significantly improved, and the failure modes were also enhanced.

Keywords: post-tensioned; retrofitting; brick wall; test; construction technique