碳纤维加固单管塔内法兰节点试验研究

Experimental Study on the Inner Flange Joints of Monopole Strengthened with Carbon Fiber

摘要: 通信单管塔一般根据塔段之间的连接节点类型分为插接式单管塔、内法兰单管塔、外法兰单管塔。内法兰单管塔常常因维护不到位出现内法兰节点破坏的情况。本文提出在内法兰节点外侧粘贴碳纤维板的方式加固单管塔内法兰节点，为了验证其加固效果，制作三个内法兰节点模型进行静力加载试验，其中包括未加固内法兰节点模型、粘贴碳纤维板加固后内法兰节点模型、粘贴钢板加固后内法兰节点模型。试验结果表明，与粘贴钢板相比，粘贴碳纤维板能够更好地与内法兰节点协同作用，并且能够有效提升单管塔内法兰节点的承载能力。

Abstract: Communication monopoles are generally classified into slip-joint monopoles, inner flange monopoles, and outer flange monopoles based on the type of connection nodes between tower sections. Inner flange single-tube towers often suffer from inner flange node damage due to inadequate maintenance. This paper proposes to reinforce the inner flange nodes of single-tube towers by pasting carbon fiber plates on the outside of the inner flange nodes. To verify the reinforcement effect, three inner flange node models were made for static loading tests, including the unreinforced inner flange node model, the inner flange node model after pasting carbon fiber plates, and the inner flange node model after pasting steel plates. The results show that compared with adhering steel plates, adhering carbon fiber plates can better work in synergy with the inner flanges and effectively enhance the load-bearing capacity of the inner flanges in monopole.