本文選題：鋼筋混凝土框架 + 纖維增強水泥基復合材料�。� 參考：《建筑結構學報》2017年06期

【摘要】：針對震損鋼筋混凝土框架,提出了基于纖維增強水泥基復合材料(ECC)的加固修復方法,并開展了振動測試和低周反復荷載試驗。研究結果表明:震損加固框架在加載試驗后的基本頻率僅下降了6.8%,損傷程度較輕,屈服和峰值荷載時的頂點位移角分別為1/48和1/25,破壞時位移角超過1/19。震損加固框架的峰值荷載較未損傷原框架提高了9.6%,表明ECC加固修復震損框架的方法能夠使其抗震承載能力完全恢復并略高于原框架;ECC加固震損框架的耗能能力也可恢復至原框架的水平。此外,ECC加固對震損框架的剛度提高有限,震損加固框架的初始剛度僅為原框架的36.0%,但剛度退化較為緩慢。應變分析結果表明,ECC置換梁端混凝土能夠顯著改善塑性鉸區(qū)的受力性能和破壞模式。
[Abstract]:A method of strengthening and repairing reinforced concrete frame with earthquake damage based on fiber reinforced cement matrix composite (Ecc) is proposed, and vibration test and low cycle repeated load test are carried out.The results show that the basic frequency of the frame strengthened by earthquake damage decreases only 6.8, and the damage degree is lighter. The peak displacement angles of yield and peak loads are 1 / 48 and 1 / 25, respectively, and the displacement angles of failure are more than 1 / 19.The peak load of the frame strengthened by earthquake damage is increased by 9.6than that of the original frame without damage, which indicates that the method of strengthening and repairing the frame damaged by ECC can completely recover its seismic bearing capacity and is slightly higher than the energy dissipation capacity of the frame strengthened by the original frame.Can be restored to the level of the original framework.In addition, the stiffness of the frame strengthened by ECC is limited, the initial stiffness of the frame strengthened by earthquake damage is only 36.0 of the original frame, but the stiffness degradation is slow.The results of strain analysis show that ECC replacement concrete can significantly improve the mechanical behavior and failure mode of plastic hinge region.
【作者單位】： 上海市建筑科學研究院(集團)有限公司上海市工程結構安全重點實驗室;
【基金】：上海市優(yōu)秀技術帶頭人計劃項目(16XD1422400)
【分類號】：TU375.4

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