- 摘 要
-
（鹽城工學院土木工程學院， 鹽城 224051）
［摘要］提出采用E玻纖織物增強磷酸鎂水泥基細骨料混凝土薄板加固RC梁的方法。以加固層織物網(wǎng)層數(shù)為主要變化參數(shù)，進行了8根加固梁和1根對比梁的抗彎試驗研究，分析加固梁的破壞模式、荷載-撓度、荷載-鋼筋應變、荷載-混凝土應變關系、裂縫開展情況，研究加固層織物網(wǎng)層數(shù)變化對RC梁正截面受彎承載力特性的影響。試驗結果表明，該加固方法可以有效地提高梁的開裂荷載、屈服荷載和極限荷載；加固后梁的延性降低?；谠囼炑芯?，提出了加固梁的受彎承載力計算方法，給出了相關計算公式。
［關鍵詞］織物增強混凝土； 加固； RC梁； 受彎承載力
中圖分類號：TU528-043, TU375-1文獻標識碼：A文章編號：1002-848X(2017)13-0089-05
Experimental research on flexural behavior of RC beams strengthened with E\|glass textile reinforced fine aggregate concrete sheets used magnesia-phophate cements
Zhi Zhengdong, Chen He, Xun Yong, Yang Jianming, Du Yubing
(School of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, China)
Abstract:A new method with E-glass textile reinforced fine aggregate concrete sheets used magnesia-phophate cements was proposed for the strengthened RC beams. Taking textile layers as main variation parameters, eight strengthened beams and one no-strengthened beam were experimentally investigated. The failure pattern, relationship of load-deflection, relationship of load-steel strain, relationship of load-concrete strain and crack-development were analyzed. The flexural behavior of RC beam affected by the number of textile layers was studied. The results indicate that the cracking loading, yield loading and ultimate loading of the strengthened beams are increased, and the ductility of the strengthened beams is reduced. Based on the experimental research,the calculation method of bending capacity of the strengthened beams was proposed and the calculating formulas were derived.
Keywords:textile reinforced concrete; strengthen; reinforced concrete beam; flexural capacity
* 國家自然科學基金項目資助（51478408），住房和城鄉(xiāng)建設部科技項目資助（2013-K4-42,2013-K4-41,2013-K7-4）。
作者簡介：支正東，碩士，副教授，Email：zhizhengdong@163.com。
