- 摘 要
-
（1 揚州大學(xué)建筑科學(xué)與工程學(xué)院， 揚州 225127; 2 揚州大學(xué)工程設(shè)計研究院， 揚州 225012）
［摘要］試驗設(shè)計并制作了3種配筋、5種替換高度的試驗梁共15根，并對試驗梁進行四點彎曲試驗，研究不同工程水泥基復(fù)合材料（ECC）替換高度、配筋類型對復(fù)合梁受彎性能的影響。試驗分析了整個加載過程試驗梁的承載力、變形、鋼筋變形協(xié)調(diào)性及裂縫變化情況和規(guī)律。研究表明：所有試驗梁均滿足平截面假定；配筋相同時，ECC-RC復(fù)合梁的承載力較普通混凝土梁有明顯提高，且配筋率較小試驗梁的承載力和抵抗變形能力提高更為突出；鋼筋與ECC有較好的協(xié)調(diào)變形能力，ECC與普通混凝土粘結(jié)良好；ECC可有效改善混凝土梁的抗裂性能。
［關(guān)鍵詞］工程水泥基復(fù)合材料（ECC）； 混凝土復(fù)合梁； 受彎性能； 承載力； 裂縫寬度
中圖分類號：TU375文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)24-0097-06
Experimental study on reinforced concrete composite flexural beams strengthened with ECC
Zhou Kaifu1, 2, Ge Wenjie1, Cao Dafu1
（1 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127， China;2 Engineering Design and Research Institute， Yangzhou University, Yangzhou 225012， China）
Abstract:Fifteen test beams with three different reinforcements and five different replacement heights were designed and made. Four-point bending tests were carried out to study the effects of different replacement heights of engineered cementitious composite (ECC) and reinforcement types on the flexural behavior of composite beams. The test beams′ bearing capacity, deformation, deformation compatibility of steel bar and the development situation and rule of cracks during the whole loading process were analyzed. The results show that all the test beams satisfy the plane section assumption; with the same reinforcement, the bearing capacity and the anti\|deformation ability of ECC-RC composite beams is obviously higher than that of ordinary concrete beams, especially the beam having lower reinforcement ratio; the steel reinforcement and ECC can deformed compatibility, ECC and concrete have good bond behavior; ECC can improve the crack resistance of concrete beams effectively.
Keywords:engineered cementitious composite(ECC); concrete composite beam; flexural behavior; bearing capacity; crack width
*國家自然科學(xué)基金資助項目(51678514), 江蘇省六大人才高峰項目(JZ038, 2016), 揚州大學(xué)“高端人才支持計劃”資助項目。
通訊作者：葛文杰，博士，副教授，碩士生導(dǎo)師，Email: gewj@yzu.edu.cn。
