EXPERIMENTAL STUDY ON BUCKLING RESISTANCE TECHNIQUE OF STEEL MEMBERS STRENGTHENED USING FRP
EXPERIMENTAL STUDY ON BUCKLING RESISTANCE TECHNIQUE OF STEEL MEMBERS STRENGTHENED USING FRP
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FRP加固钢构件抗屈曲技术试验研究
DOI：
10.1142/s0219455412004604
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发表时间：
2012-01-01
影响因子：
3.6
通讯作者：
Bai, Yu
中科院分区：
文献类型：
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作者：
Feng, Peng;Bekey, Sawulet;Bai, Yu
介绍了纤维增强聚合物（FRP）加固技术提高钢构件抗屈曲性能的概念和试验论证。通过三个试件的初步试验，介绍了该方法的概念设计。在此基础上，进行了14个试件的轴压试验，研究了不同长细比、约束构造、填充材料和端部连接等设计参数和结构形式下的抗压性能和加固措施。通过理论分析和试验结果的对比，对加固方案进行了分析，结果表明，FRP加固能有效地防止钢构件的整体屈曲破坏，提高钢构件的极限承载力和变形能力。加固后构件的最大承载力是未加固构件的2.86倍，且破坏仍保持延性。此外，还将这种加固方法加固后的构件的承载力与原钢构件和组合构件的欧拉荷载进行了比较。
Fiber-reinforced polymer (FRP) strengthening technique to improve buckling resistance of steel members is presented in concept and experimental demonstration. The conceptual design of this method is introduced through the preliminary experiments on three specimens. Then, another 14 specimens are tested under axially compressive loading, by which the compressive behavior and the strengthening erects are investigated considering different design parameters and configuration, including the slenderness ratio, the confinement detail, the filled materials and the end connection. The strengthening erects are analyzed by the comparison of both theoretical and test results, which show that the overall buckling failure of steel members can be prevented by FRP strengthening and the ultimate loading capacity and deformation capacity of steel members are enhanced considerably. The maximum load-bearing capacity of strengthened members is 2.86 times of the nonstrengthened ones, and the failure maintains a ductile behavior. In addition, the load-bearing capacity of the members strengthened in this way is compared with the Euler loads of the original steel member and the composite member.