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(1 天津大學(xué)建筑工程學(xué)院， 天津 300350；2 中國(guó)建筑科學(xué)研究院有限公司， 北京 100013；3 北京市既有建筑改造工程技術(shù)中心(天津分中心)， 天津 300350)

摘要: 預(yù)制空心板空心率大，板頂混凝土厚度小，無(wú)法使用常規(guī)界面處理方法對(duì)其進(jìn)行疊合加固。 對(duì) 9 組混凝土推出試件(共 27 個(gè)試件)進(jìn)行新舊混凝土界面剪切試驗(yàn)，研究幾種界面處理措施下預(yù)制空心板疊合界面的粘結(jié)性能，同時(shí)研究尼龍錨栓應(yīng)用于預(yù)制空心板疊合加固的可行性。 結(jié)果表明，人工鑿毛并輔以尼龍膨脹錨栓的界面處理措施可以滿(mǎn)足疊合界面的規(guī)范要求，但是尼龍錨栓單獨(dú)承受剪切作用時(shí)效果不佳。

關(guān)鍵詞: 預(yù)制空心板；疊合加固；粘結(jié)性能；界面處理；尼龍錨栓

中圖分類(lèi)號(hào):TU375. 2 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002￣848X(2022)01￣0115￣05

DOI:10. 19701 / j. jzjg. 20200400

Experimental study on the interface bonding performance of strengthening withconcrete laminate layer with precast hollow slab

SHU Tianyu1， XU Fuquan2， XIE Jian1，3

(1 School of Civil Engineering， Tianjin University， Tianjin 300350， China；2 China Academy ofBuilding Research， Beijing 100013， China；3 Beijing Engineering Research Center ofExisting Building Renovation (Tianjin Branch)， Tianjin 300350， China)

Abstract: Conventional interface treatment cannot be used in strengthening precast hollow slabs with concrete laminatelayer because of its characteristics of high void ratio and thin concrete layer on the slab top. The interface shear test of newand old concrete of 9 groups of push￣out specimens ( 27 specimens) was carried out， and investigated the bondingperformance of the composite interface of precast hollow slab based on interface treatment measures. At the same time， thefeasibility of nylon anchor bolt applied to the composite reinforcement was discussed. The results show that the interfacetreatment measures of artificial chiseling and nylon expansion anchor bolt can meet the standard requirements of thecomposite interface， however the effect of nylon anchor bolt under shear alone is unsatisfactory.

Keywords:precast hollow slab；strengthening with concrete laminate layer；bonding performance；interface treatment；nylon anchor bolt

∗北京市科技計(jì)劃課題(Z181100009218001)。

第一作者:舒田宇，碩士研究生，主要從事混凝土結(jié)構(gòu)加固方法研究，Email: shuty0312@ tju. edu. cn。

[引用本文] 舒田宇，徐福泉，謝劍. 疊合加固預(yù)制空心板界面粘結(jié)性能試驗(yàn)研究[ J]. 建筑結(jié)構(gòu)，2022，52(1):115￣119. SHU Tianyu，XU Fuquan，XIE Jian. Experimental study on the interface bonding performance of strengtheningwith concrete laminate layer with precast hollow slab[J]. Building Structure，2022，52(1):115￣119.