- 摘 要
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袁海慶 (武漢理工大學(xué)430070)杜 旌 符晶華 (湖北建科結(jié)構(gòu)加固有限公司 武漢430071)
[提要] 為克服現(xiàn)有混凝土柱加固方法的不足,采用專用螺栓千斤頂對混凝土軸心受壓構(gòu)件進(jìn)行預(yù)應(yīng)力法加固試驗(yàn),使卸載和加固同步進(jìn)行,有效地消除了二次受力應(yīng)變滯后影響。加固后組合構(gòu)件整體承載力得到顯著提高,被加固構(gòu)件和加固構(gòu)件共同作用效果良好。
[關(guān)鍵詞] 預(yù)應(yīng)力法加固 軸心受壓 混凝土柱 應(yīng)變滯后In order to dispel the defects of the methods of strengthening concrete columns under axial compression,a new way called prestressing by bolt-jack is presented.The results indicate that the lagging of strain produced by repressing can be avoided, and the unloading and strengthening can be acted at the same time. The ultimate strength of the strength-ened columns is increased remarkably. The added parts and the original column work well together.
Keywords: strengthening; prestress; concrete column; axial compression; strain lagging參 考 文 獻(xiàn)
1.混凝土結(jié)構(gòu)加固技術(shù)規(guī)范(CECS25:90).中國計劃出版社,1992.
2.卓尚木,季直倉,卓昌志,鋼筋混凝土結(jié)構(gòu)事故分析與加固.中國 建筑工業(yè)出版社,2000.
3.杜 旌.預(yù)應(yīng)力法加固混凝土受壓構(gòu)件試驗(yàn)研究.碩士學(xué)位論文,武漢理工大學(xué),2002
4.葛培中,劉預(yù)應(yīng)力撐桿加固柱的探討.建筑結(jié)構(gòu),2000,30(11).
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