您現在的位置:建筑結構>> 期 刊>> 2019年>> 第04期>>正文內容
內嵌預應力混雜筋材加固混凝土梁試驗研究*
丁亞紅,李一凡
摘 要

(河南理工大學土木工程學院, 焦作 454000)

[摘要]基于螺旋肋鋼絲、CFRP筋材兩種材料的特點,提出將預應力螺旋肋鋼絲、CFRP筋材混合內嵌于混凝土梁中的加固方法,并通過對1根對比梁、6根內嵌不同加固筋材的試驗梁進行靜力加載試驗,系統分析了加固梁的抗彎承載能力、變形能力、裂縫狀況、破壞形態和延性等。研究結果表明,加固方法在滿足延性要求的同時,能夠顯著提高試驗梁的開裂荷載、屈服荷載、極限荷載,改善被加固梁的變形能力。其中,BF1P2-45加固梁的加固效果較好。研究成果可為其他相關研究提供參考。

[關鍵詞]混凝土; 彎曲性能; 內嵌加固; 預應力; 螺旋肋鋼絲; CFRP筋材

中圖分類號:TU378.8文獻標識碼:A文章編號:1002-848X(2019)04-0054-04

 

Experimental study on concrete beams strengthened with prestressed  near-surface-mounted helical rib steel wire and CFRP rod

Ding Yahong, Li Yifan

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

Abstract:Based on the properties of helical rib steel wire and carbon fiber reinforced polymer (CFRP) rod, a new reinforcement method of concrete beams  with prestressed near-surface-mounted (NSM) helical rib steel wire and CFRP rod was  presented. Static loading tests were carried out on one contrast beam and six test beams strengthened with different reinforcement bars. The flexural bearing capacity, deformation capacity, crack condition, failure state and ductility of the strengthened beams were analyzed systematically. The experimental results show that the reinforcement method can significantly increase the cracking load, yield load and ultimate load of the test beams while meeting the requirement of ductility, and the deformability was also improved. The research results can  provide a reference for other related research.

Keywords:concrete; flexural properties; near-surface-mounted; prestressing; helical rib steel wire; CFRP rod

 

*國家自然科學基金項目(51108161)。

 

作者簡介:丁亞紅,博士,教授,Email:[email protected]

下載地址
福建31选7大星走势图