預應力鋼絞線網(wǎng)加固混凝土圓柱的軸壓性能
發(fā)布時間:2018-05-13 16:24
本文選題:預應力高強鋼絞線 + 混凝土柱; 參考:《工程力學》2014年03期
【摘要】:開發(fā)了一種預應力鋼絞線(鋼絲繩)網(wǎng)加固混凝土柱新技術,對24根預應力加固混凝土圓柱和2根未加固對比柱進行了試驗,研究在單調軸向荷載作用下,鋼絞線間距、預應力水平對混凝土柱加固效果的影響。試驗結果表明:較對比柱,預應力加固柱的軸向峰值應力和應變最大提高幅度為83%和95%,加固效果隨預應力水平的提高而提高;隨鋼絞線間距的減小,加固效果大幅度提高;鋼絞線間距對加固效果的影響大于預應力水平的影響。建立了預應力鋼絞線加固混凝土柱峰值應力和應變計算式,提出了兩種應力-應變全曲線關系模型,計算結果與試驗吻合良好,可為相關研究提供理論支持。預應力鋼絞線網(wǎng)加固混凝土柱技術是一種主動、高效、無損加固新技術,具有推廣和應用價值。
[Abstract]:A new technique of strengthening concrete columns with prestressed steel strand (wire rope) net is developed. The experimental results of 24 prestressed reinforced concrete columns and 2 unstrengthened contrast columns are carried out. The distance between steel strands under monotone axial load is studied. The influence of prestress level on reinforcement effect of concrete column. The experimental results show that the axial peak stress and strain of prestressed reinforced columns increase by 83% and 95%, and the reinforcement effect increases with the increase of prestress level, and the reinforcement effect increases greatly with the decrease of the distance between steel strands, and the maximum axial peak stress and strain of prestressed columns are increased by 83% and 95%, respectively. The effect of steel strand spacing on reinforcement effect is greater than that on prestress level. The formula of peak stress and strain of prestressed steel strand reinforced concrete column is established. Two kinds of stress-strain full curve relation models are proposed. The calculated results are in good agreement with the test, which can provide theoretical support for related research. The technique of strengthening concrete column with prestressed steel wire mesh is a new technique of active, high efficiency and nondestructive reinforcement, which has the value of popularization and application.
【作者單位】: 北京工業(yè)大學城市與工程安全減災省部共建教育部重點實驗室;北京環(huán)友建筑技術發(fā)展有限責任公司;
【分類號】:TU378.3
【參考文獻】
相關期刊論文 前6條
1 郭子雄;張杰;楊勇;;設置外包預應力鋼板箍RC短柱抗震性能研究[J];哈爾濱工業(yè)大學學報;2006年01期
2 過鎮(zhèn)海,張秀琴,張達成,王如琦;混凝土應力-應變全曲線的試驗研究[J];建筑結構學報;1982年01期
3 聶建國;陶巍;張?zhí)焐?;預應力高強不銹鋼絞線網(wǎng)-高性能砂漿抗彎加固試驗研究[J];土木工程學報;2007年08期
4 吳剛;蔣劍彪;吳智深;田野;張敏;;預應力高強鋼絲繩抗彎加固鋼筋混凝土梁的試驗研究[J];土木工程學報;2007年12期
5 肖詩云;張劍;;不同應變率下混凝土受壓損傷試驗研究[J];土木工程學報;2010年03期
6 郭俊平;鄧宗才;林勁松;盧海波;;預應力高強鋼絞線網(wǎng)加固鋼筋混凝土板的試驗研究[J];土木工程學報;2012年05期
【共引文獻】
相關期刊論文 前10條
1 沈正;董祥;宗蘭;;固化劑JNS-1固化粉煤灰試驗研究[J];四川建筑科學研究;2010年06期
2 谷光平,蔡學勤,江傳順;混凝土的斷裂強度計算模型研究[J];安徽建筑工業(yè)學院學報(自然科學版);1999年01期
3 王利民,徐世p,
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