大跨越输电高塔发展历程及其结构承载性能研究综述

Development of Long-span High-rise Transmission Towers and Research on Structural Bearing Capacity: a Review

随着跨越距离的增大,以及电压等级、通航高度等要求的提高,大跨越输电塔不断刷新高度记录。超高高度和超大体量带来了更为复杂的结构体系和更高的承载力需求。大跨越输电高塔的主要结构形式历经了组合型钢塔、钢管塔和钢管混凝土塔等几次重要更迭优化,在形成大量技术成果的同时也存在进一步研究探索的空间。该文通过梳理国内外大跨越输电高塔发展历程和技术现状,提出大跨越输电高塔技术发展方向,并从组合型钢、钢管、钢管混凝土组合结构承载性能以及潜在杆塔新材料、新塔型等方面对现阶段研究成果进行系统性综述,旨在促进大跨越超高杆塔结构承载性能研究成果凝练提升,指出输电高塔承载性能研究仍需深化、拓展的方向,进一步提高我国超高杆塔设计建造领先水平。

With the increases of crossing spans and improving requirements of voltage levels,permissible passing heights,etc.,the heights of long-span transmission towers continually break records.Their super heights and sizes lead to more complex structural systems and higher demand for bearing capacity.The main structural forms of long-span transmission towers have changed from built-up angle steel towers to steel tube towers and concrete-filled steel tube towers with several significant optimizations.Although lots of technical achievements are obtained,some research contents are still needed to be further explored.The development history and technical situation of long-span transmission towers were summarized in this paper to find the technical trends.The structural bearing capacity of built-up steel towers,steel tube towers,concrete filled steel tube towers and those possible towers with new materials or structural forms were comprehensively reviewed.This study was intended to condense and improve the research on structural bearing capacity of long-span transmission towers and present extended development directions of study on structural bearing capacity of tall transmission tower,which help to increase the leading level of design and construction for super high-rise transmission towers in the world.