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（1 內(nèi)蒙古工業(yè)大學(xué)理學(xué)院， 呼和浩特 010051； 2 內(nèi)蒙古工業(yè)大學(xué)土木工程學(xué)院， 呼和浩特 010051；3 內(nèi)蒙古工業(yè)大學(xué)礦業(yè)學(xué)院， 呼和浩特 010051； 4 內(nèi)蒙古建筑職業(yè)技術(shù)學(xué)院， 呼和浩特 010070)

［摘要］設(shè)計(jì)制作了鋼-聚丙烯混雜纖維混凝土柱試件，并對(duì)其進(jìn)行低周反復(fù)荷載試驗(yàn)以研究其抗震性能。通過(guò)分析破壞現(xiàn)象、破壞形態(tài)、滯回曲線、骨架曲線、延性、耗能能力、剛度退化等抗震性能指標(biāo)，探討纖維種類、纖維體積摻量對(duì)試件各抗震性能指標(biāo)的影響規(guī)律。結(jié)果表明：鋼-聚丙烯混雜纖維的摻入使得試件滯回曲線更加豐滿、捏攏現(xiàn)象減緩，骨架曲線延性平臺(tái)更為明顯，達(dá)到峰值荷載后，骨架曲線下降更為緩慢、剛度退化趨緩，塑性變形能力和耗能能力相應(yīng)增加，柱的抗震性能得到提高。在選取的纖維體積摻量中，鋼纖維體積摻量為1-5%時(shí)試件的抗震性能最優(yōu)。

［關(guān)鍵詞］鋼-聚丙烯混雜纖維混凝土； 抗震性能；  滯回曲線； 延性； 耗能能力

中圖分類號(hào)：TU375， TU502文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)07-0107-06

Experimental study on seismic behavior of hybrid fiber reinforced concrete columns

BAI Jianwen1,3, ZHAO Yanru2， XU Rong4， WANG Lei1

(1 School of Science, Inner Mongolia University of Technology, Hohhot 010051， China;2 School of Civil Engineering, Inner Mongolian University of Technology, Hohhot 010051， China;3 Institute of Mining Technology, Inner Mongolia University of Technology, Hohhot 010051， China;4 School of Architecture Engineering, Inner Mongolia Technical College of Construction, Hohhot 010070， China)

Abstract:The steel-polypropylene hybrid fiber reinforced concrete colums were designed and manufactured，and the tests were carried out under low reversed cyclic horizontal loads to research its seismic performance. By analyzing the seismic performance indexes such as damage phenomenon, failure mode, hysteresis curve, skeleton curve, ductility, energy dissipation and stiffness degradation, etc, the influence of fiber type and fiber volume content on the seismic performance indicators of the specimen was discussed. Experimental results show that steel-polypropylene hybrid fibers makes the hysteresis curve of the specimen is more plentiful，the pinch is slowed down，the skeleton curve has more obvious ductile platform, the curve decreases more slowly and the stiffness degradation slows down after the peak load, the ability of plastic deformation and energy dissipation increase，thus, the seismic behavior of the column is improved in all aspects. In the selected fiber volume fraction, when the volume fraction of steel fiber is 1-5%, the seismic behavior of the specimen is optimal.

Keywords:steel-polypropylene hybrid fiber reinforced concrete column; seismic behavior; hysteretic curve; ductility; energy dissipation

*國(guó)家自然科學(xué)基金項(xiàng)目（11362013），內(nèi)蒙古自然科學(xué)基金項(xiàng)目（2019LH05020），內(nèi)蒙古自治區(qū)高等學(xué)?？茖W(xué)技術(shù)研究項(xiàng)目（NJZY18256）， 內(nèi)蒙古工業(yè)大學(xué)科學(xué)研究項(xiàng)目（X201532）。

通訊作者：趙燕茹，博士，教授，博士生導(dǎo)師，Email:zhaoyanru710523@126.com。