27m门型预应力钢纤维混凝土杆塔真型模拟试验研究

对研制的27 m门型预应力钢纤维混凝土杆塔进行了真型模拟试验研究。结果表明,电杆在正常使用荷载下处于抗裂弹性工作状态,表现出良好的整体受力性能,各项性能均满足设计要求。一旦发生超载运行出现裂缝,裂缝细短且非贯通,卸载后变形恢复能力强,提高了结构正常使用性能。同时,预应力钢纤维混凝土电杆在预应力放张和杆段焊接安装过程中,避免了普通预应力混凝土电杆,在预应力筋挂板和杆段连接钢圈附近混凝土起皮爆裂现象。

Full-scale Experimental Study on 27 m High Portal Double Prestressed Steel Fiber Reinforced Concrete Poles

A full-scale experimental study has been carried out on the 27 m high portal double prestressed steel fiber reinforced concrete poles.The test results indicate that the poles is in the anti-cracking flexible status under normal applicable loads,showing the good integral forced features,and all performances have met the design requirements.As a crack occurs due to over load operation,the crack is short and narrow,not penetrated.After unloading the recovery capability from deformation is strong,which increases the normal application of the structure.