Experimental tests on corroded tubular TT-joints with and without Carbon fiber reinforced polymer (CFRP) reinforcement were conducted. The failure process, load-displacement curves, and observed failure modes of the tested specimens under axial brace compression were obtained and discussed. Experimental results indicate that the bearing capacity and stiffness of the corroded tubular TT-joints strengthened with six layers of CFRP were improved efficiently. The improvement in the static strength was mainly produced by the constraint of CFRP to the chord deformation at the brace/chord intersection. Thereafter, finite element analysis on 80 models were conducted to investigate the influence of the number of CFRP laminates, corrosion depth, and corrosion length on the static strengths of CFRP strengthened tubular TT-joints with local corrosion. Parametric study showed that, i) more layers of CFRP laminates increase both stiffness and ultimate capacity. ii), the contribution of each layer of CFRP laminates on the bearing capacity reduces gradually with the increase of the number of CFRP laminates or corrosion depth. iii) after a certain length of CFRP, the effect of CFRP length becomes neglectable. Finally, a new equation is proposed to investigate the influence of corrosion and CFRP strengthening on the ultimate bearing capacity of the CHS tubular TT-joints.

对带有和不带有碳纤维增强聚合物 (CFRP) 增强材料的腐蚀管状 TT 接头进行了实验测试。获得并讨论了受试件在轴向支撑压缩下的破坏过程、载荷-位移曲线和观察到的破坏模式。实验结果表明，六层CFRP加固的腐蚀管状TT接头的承载能力和刚度得到了有效的提高。静强度的提高主要是由CFRP对支撑/弦杆交叉处的弦杆变形的约束产生的。此后，对80个模型进行了有限元分析，研究了CFRP层压板数量、腐蚀深度和腐蚀长度对局部腐蚀CFRP加强管TT接头静强度的影响。参数研究表明，i) 更多层的 CFRP 层压板可提高刚度和极限承载力。ii) 随着CFRP层合板数量或腐蚀深度的增加，每层CFRP层合板对承载力的贡献逐渐减小。iii) 在使用一定长度的 CFRP 后，CFRP 长度的影响变得可以忽略不计。最后，提出了一个新方程来研究腐蚀和 CFRP 强化对 CHS 管状 TT 接头极限承载力的影响。CFRP 长度的影响变得可以忽略不计。最后，提出了一个新方程来研究腐蚀和 CFRP 强化对 CHS 管状 TT 接头极限承载力的影响。CFRP 长度的影响变得可以忽略不计。最后，提出了一个新方程来研究腐蚀和 CFRP 强化对 CHS 管状 TT 接头极限承载力的影响。