本文選題：預(yù)應(yīng)力鋼絞線 + 短柱　； 參考：《預(yù)應(yīng)力技術(shù)》2016年05期

【摘要】：為研究預(yù)應(yīng)力鋼絞線加固鋼筋混凝土(RC)短柱的抗震特性,對7個試件進(jìn)行了低周反復(fù)加載試驗。試驗研究了軸壓比、鋼絞線配置特征值和預(yù)應(yīng)力水平對加固短柱抗震性能的影響。結(jié)果表明,預(yù)應(yīng)力鋼絞線可有效改善RC短柱的抗震性能,延性和耗能能力顯著提高,與未加固試件PC1相比,預(yù)應(yīng)力鋼絞線加固短柱的位移延性系數(shù)、累積耗能能力最大值分別提高1.87倍和6.78倍,鋼絞線配置量及預(yù)應(yīng)力水平對加固柱滯回曲線有明顯的影響,其它條件相同時,鋼絞線配置量大或者預(yù)應(yīng)力水平較高的試件滯回曲線較飽滿;對于低軸壓比(n≤0.30)試件,鋼絞線配置特征值達(dá)到0.119、預(yù)應(yīng)力水不小于0.40時即可獲得較好的抗震性能。在試驗基礎(chǔ)上,提出了預(yù)應(yīng)力鋼絞線加固RC圓形短柱的受剪承載力計算公式,計算結(jié)果與試驗值總體吻合良好。成果為預(yù)應(yīng)力鋼絞線加固RC短柱提供了參考數(shù)據(jù)和設(shè)計計算方法。
[Abstract]:In order to study the seismic behavior of reinforced concrete (RC) short columns strengthened by prestressed steel strands, seven specimens were subjected to low cycle repeated loading tests. The effects of axial compression ratio, steel strand configuration eigenvalue and prestress level on the seismic behavior of strengthened short columns are studied experimentally. The results show that prestressed steel strands can effectively improve the seismic performance of RC short columns, and the ductility and energy dissipation capacity of RC short columns are improved significantly. The displacement ductility coefficient of RC short columns strengthened by prestressed steel strands is higher than that of unstrengthened specimens PC1. The maximum value of cumulative energy dissipation capacity increases by 1.87 times and 6.78 times, respectively. The configuration of steel strands and the level of prestress have obvious effects on the hysteretic curves of strengthened columns, and other conditions are the same. The hysteretic curves of specimens with large configuration or high prestress level are full, and for specimens with low axial compression ratio (n 鈮，

本文編號：2026359