The existing regulations and specifications for tower structure of overhead transmission line do not specify the arrangement requirements for tilt angle of stiffening rib of angle steel tower footplate,which are usually set according to customs and experiences.Relying on the towers of 500 kV AC and±800 kV UHVDC transmission line project,the force performance of tower footplate with single main material and four anchor bolts,single main material and eight anchor bolts and double main material and eight anchor bolts under different tilt angles is analyzed by finite element numerical method.The analysis results show that the change of tilt angle of stiffening ribs has a small effect on tower footplate with four anchor bolts,but has a relatively large effect on tower footplate with eight anchor bolts.The research results play a certain guiding role in the calculation and drafting for angle steel tower footplate of overhead transmission line.
transmission tower structureangle steel towertower footplatestiffening ribstilt anglefinite element analysis
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