- 摘 要
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（1 河北工業(yè)大學(xué)土木與交通學(xué)院， 天津 300401； 2 天友建筑設(shè)計股份有限公司， 天津 300401）
［摘要］為研究預(yù)應(yīng)力鋼絞線加固對震損混凝土圓柱的抗震特性，共設(shè)計了10個試件，其中4個為未加固試件，另外6個為不同損傷程度的加固試件，采用擬靜力試驗，分別研究預(yù)應(yīng)力度、損傷指數(shù)和鋼絞線間距對試件抗震性能影響。結(jié)果表明：所有加固試件承載力基本滿足應(yīng)急承載力恢復(fù)要求，加固試件位移延性系數(shù)較未加固試件有了較大提高；鋼絞線預(yù)應(yīng)力度對加固效果影響顯著，隨著預(yù)應(yīng)力度的增加，試件的滯回曲線更加飽滿，峰值荷載明顯提高，位移延性系數(shù)顯著改善；并建立了預(yù)應(yīng)力鋼絞線加固震損混凝土圓柱的抗剪承載力計算公式，公式計算結(jié)果和試驗結(jié)果較為吻合且留有一定的安全儲備，可為實際工程損傷加固提供參考。
［關(guān)鍵詞］預(yù)應(yīng)力鋼絞線； 損傷程度； 抗震性能； 抗剪承載力； 位移延性系數(shù)
中圖分類號：TU378-3文獻標(biāo)識碼：A文章編號：1002-848X(2020)15-0030-06
Experimental and theoretical research on seismic behavior of the prestressed steel strand reinforcement on the seismically damaged concrete cylinder
ZHAO Shaowei1, WANG Qi1, LIU Kun2, GUO Rong1
(1 School of Civil and Transportation Engineering， Hebei University of Technology， Tianjin 300401， China;2 Tianyou Architectural Design Co., Ltd.， Tianjin 300401， China）
Abstract:In order to test the seismic performance of the prestressed steel strand reinforcement on the seismically damaged concrete cylinder, a total of ten specimens were designed, consisting of four unreinforced specimens and six reinforced specimens with different degrees of damage. The effects of prestress degree, damage index and steel strand spacing on the seismic performance of the specimen were tested by pseudo-static test. The results show that the bearing capacity of all the reinforced specimens basically meets the recovery requirements of emergency bearing capacity, and the displacement ductility coefficient of reinforced specimens is greatly improved compared with the unreinforced specimens. In addition, the prestress degree of steel strands has a significant effect on the reinforcement effect. With the increase of prestress degree, the hysteresis curve of specimens is fuller, the peak load is significantly improved, and the displacement ductility coefficient is obviously improved. A formula for calculating the shear capacity of the prestressed steel strand reinforcement on the seismically damaged concrete cylinder is established. The calculation results tallies with the test results. It also has a certain safety reserve, which can provide a reference for the actual engineering damage reinforcement.
Keywords:prestressed steel strand; degree of damage; seismic performance; shear capacity; displacement ductility coefficient
*河北省教育廳重點項目（ZD2018051），河北省自然科學(xué)基金（E2018202173）。
作者簡介：趙少偉，博士，教授，碩士生導(dǎo)師，Email: zhaoshaowei@hebut.edu.cn; 通訊作者：王淇，碩士，Email:461417748@qq.com。
