不同材料及加固方式对梁弯曲性能影响试验研究

复合材料科学与工程 ›› 2019, Vol. 0 ›› Issue (11): 50-57.

不同材料及加固方式对梁弯曲性能影响试验研究

徐平, 代峻峰, 丁亚红^*, 马金一

河南理工大学土木工程学院,焦作 454000

收稿日期:2019-02-26 出版日期:2019-11-28 发布日期:2019-11-28
通讯作者: 丁亚红(1973-),女,博士,教授,主要从事高性能混凝土及结构加固方面的研究,dingyahong@hpu.edu.cn。
作者简介:徐平(1981-),男,博士,副教授,主要从事高性能混凝土工程力学方面的研究。
基金资助:
国家自然科学基金资助项目(51108161,51508166);河南省交通厅科技项目(2016Y2-1);河南省博士后基金项目(169440)

EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF REINFORCED BEAMS AFFECTED BY THE DIFFERENT MATERIALS AND METHODS OF REINFORCEMENT

XU Ping, DAI Jun-feng, DING Ya-hong^*, MA Jin-yi

School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Received:2019-02-26 Online:2019-11-28 Published:2019-11-28

摘要/Abstract

摘要： 为研究不同材料、不同加固量和不同加固方式对加固梁承载能力、挠度变化、破坏形态及裂缝发展的影响,通过四点弯曲加载试验,对11组试验梁进行抗弯试验研究。试验结果表明:不同加固筋材及加固方式对试验梁的开裂荷载、屈服荷载、极限荷载及跨中荷载-挠度曲线都有一定的影响。提升开裂荷载主要受加固方式的影响,内嵌螺旋肋筋鱼尾式及格栅式的加固梁开裂荷载提升明显,较直嵌式加固方式,最大提高了182%;相同加固量时,端部锚固方式的加固梁屈服荷载和极限荷载提升最明显;采用内嵌CFRP筋材加固梁的极限荷载最大,最大提高了113.68%。加固材料对加固梁的抗弯刚度影响明显,内嵌CFRP筋加固梁的抗弯刚度最优;十字嵌入式、鱼尾嵌入式、格栅式及端部锚固式加固梁的抗弯刚度要明显优于直嵌式加固梁。

关键词: 钢筋混凝土梁, 内嵌法, CFRP, 螺旋肋筋, 弯曲性能

Abstract: To study the influence of different materials, reinforcement amounts, and reinforcement methods on the carrying capacity, deflection change, failure modes and crack propagation of reinforced beams, 11 experimental beams were subjected to the four-point loading test. The results show that the cracking load, yield load, ultimate load and load-deflection curve of the test beams were directly affected by the materials and methods of reinforcement. The promotion of cracking load was mainly affected by the reinforcement method, and the cracking loads of the reinforced beams embedded spiral ribbed steel wires with fishtail and grille were increased obviously, which was up to 182% higher than that of the reinforced beams by the straight embedded reinforcement method. The yield load and ultimate load of the reinforced beams used the end anchorage method were increased most obviously with the same amount. The ultimate load of reinforced beams with embedded Carbon Fiber Reinforced Polymer/Plastic (CFRP) bars was the largest, which is increased by 113.68%. The reinforced materials had obvious influence on the flexural rigidity of the reinforced beams, and the flexural rigidity of beams with CFRP bars was optimum. The flexural rigidity of cross-embedded, fishtail-embedded, grille, and end-anchorage reinforced beams was significantly better than that of the straight-embedded reinforced beams.

Key words: reinforced concrete beams, Near Surface Mounted, CFRP, spiral ribbed steel wires, flexural behavior

中图分类号:

TB332

徐平, 代峻峰, 丁亚红, 马金一. 不同材料及加固方式对梁弯曲性能影响试验研究[J]. 复合材料科学与工程, 2019, 0(11): 50-57.

XU Ping, DAI Jun-feng, DING Ya-hong, MA Jin-yi. EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF REINFORCED BEAMS AFFECTED BY THE DIFFERENT MATERIALS AND METHODS OF REINFORCEMENT[J]. Composites Science and Engineering, 2019, 0(11): 50-57.

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