Combination of Bamboo Filling and FRP Wrapping to Strengthen Steel Members in Compression
Combination of Bamboo Filling and FRP Wrapping to Strengthen Steel Members in Compression
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DOI：
10.1061/(asce)cc.1943-5614.0000353
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发表时间：
2013-06
影响因子：
4.6
通讯作者：
P. Feng;Yanhua Zhang;Yu Bai;L. Ye
中科院分区：
文献类型：
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作者：
P. Feng;Yanhua Zhang;Yu Bai;L. Ye
摘要本文报道了18个试件的轴压试验，采用纤维增强聚合物（FRP）织物和竹棒进行增强，以提高试件的抗屈曲性能。核心钢构件先用钢丝纵向用竹棒捆扎，然后纵向和横向用FRP布包裹。加固体系提高了构件的抗弯刚度和承载能力，竹棒在钢和FRP之间起到了轻质和自由成形的填充作用。考察了三个主要参数：(1)截面形状；(2)钢构件的公称长细比；(3)玻璃钢织物层数。虽然观察到的整体屈曲与未加强的试件类似，但加强的试件在钢构件末端表现出明显的局部变形，FRP织物在中高处断裂。荷载-位移结果表明，该方法可提高25-114%。
AbstractThis paper reports on axial compression experiments on 18 specimens that were strengthened using fiber-reinforced polymer (FRP) fabric and bamboo sticks to improve buckling resistance. The core steel members were first bundled with bamboo sticks longitudinally using steel wire and were then wrapped longitudinally and laterally with FRP fabric. The bending stiffness and load-bearing capacity of the members were increased by the strengthening system, and the bamboo sticks acted as lightweight and free-shaped filling between the steel and FRP. Three major parameters were examined: (1) the cross-sectional shape; (2) the nominal slenderness ratio of the steel members; (3) the number of FRP fabric layers. Although global buckling that is analogous to that in unstrengthened specimens was observed, the strengthened specimens exhibited significant local deformation at the end of the steel member and rupture of the FRP fabric at midheight. The load-displacement results demonstrated an increase of 25–114% fo...