预应力中空夹层钢管混凝土构件拉-压滞回性能试验研究  

Experimental Study on Tensile-Compressive Hysteretic Performance of Prestressed Concrete-Filled Double-Skin Steel Tubular Members

作　　者：王宇航[1] 徐浩然 周绪红[1] 金开元 毛捷 WANG Yuhang;XU Haoran;ZHOU Xuhong;JIN Kaiyuan;MAO Jie(School of Civil Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《建筑钢结构进展》2025年第3期12-21,共10页Progress in Steel Building Structures

基　　金：国家自然科学基金(52278144);中央高校基本科研业务费专项资金(2022CDJQY-009)。

摘　　要：随着国内风电行业发展规模日益壮大,风机功率逐渐增大,对下部支撑结构的承载能力、稳定性能也提出了更高的要求,钢-混凝土混合结构塔筒(上部纯钢塔,下部混凝土塔)应运而生。然而,由于需要现场拼装、灌浆,因此其建造效率低且后期维护成本高。基于此,提出了一种新型预应力钢管混凝土格构式风电塔架代替原有的钢-混凝土混合结构塔筒,四角柱采用预应力中空夹层钢管混凝土,提升刚度的同时减少了钢材和混凝土的用量,便于运输和吊装。中空部分作为预应力孔道进行通长整体张拉,增加结构稳定性及轴向滞回性能。目前已有学者进行了钢管混凝土构件轴向拉-压性能的研究,但鲜少有针对预应力中空夹层钢管混凝土构件轴向复杂受力情况的研究报道。为了弥补现有研究的空白,针对预应力中空夹层钢管混凝土构件在轴拉、轴压及拉-压滞回荷载作用下的力学性能开展试验研究,为我国制定风电塔架的设计标准提供一定的理论基础和试验依据。The power of wind turbines is gradually increasing with the rapid growth of the domestic wind energy industry,and higher demands have been put forward for the load bearing and stability performance of the lower support structure,leading to the creation of the steel-concrete hybrid structure tower(an upper pure steel tower and a lower concrete tower).However,because on-site assembly and grouting are required,the building process is inefficient and the maintenance costs are high.On the basis of this,this group suggests replacing the original steel-concrete hybrid construction tower with a new kind of prestressed concrete-filled steel tubular lattice-type wind turbine tower.Prestressed concrete-filled double-skin steel tubes are used for the four corner columns,which enhances rigidity,reduces the use of steel and concrete,and facilitates easier movement and lifting.The hollow part is used as a prestressing duct for through-length integral tensioning to increase the structural stability and axial hysteretic performance.Few studies have been published on the axial complex stressing of prestressed concrete-filled double-skin steel tubular members,while some researchers have currently conducted investigations on the axial tensile and compressive characteristics of concrete-filled steel tube.This paper conducts an experimental study on the mechanical characteristics of prestressed concrete-filled double-skin steel tubular members under axial tension,axial compression,and tensile-compressive hysteretic loading to overcome the shortcomings of the previous research and to provide a theoretical and experimental basis for the development of design standards for wind turbine towers in China.

关 键 词：中空夹层钢管混凝土 预应力 拉-压滞回性能 风电塔架 试验研究 

分 类 号：TU398.9[建筑科学—结构工程]