含摩擦型消能装置预应力钢柱的耐震性能  

Seismic Behavior of Post-Tensioned Steel Column Base with Friction Energy Dissipation Devices

作　　者：陈诚直[1] 林桓纬 蔡荣轩 林政亿 

机构地区：[1]交通大学土木工程学系

出　　处：《建筑钢结构进展》2016年第2期48-53,82,共7页Progress in Steel Building Structures

摘　　要：针对预应力钢柱基底含摩擦型消能装置的耐震性能进行研究,探讨初始钢绞线预应力与消能装置的影响。通过钢绞线施拉预应力接合钢柱与基础,用来提供钢柱自复位能力;消能装置采用摩擦型消能,提供柱构件与基础接合的滞回消能能力,因此柱构件在受震后拥有自复位与无残余变形特性。研究参数包含初始预应力大小、摩擦消能面积与摩擦型消能装置的位置。通过理论推导建立预应力与消能装置在钢柱与基础接合的性能模式,进而设计试件进行试验来验证其性能。试验结果表明,柱与基础接合面有开启与闭合的现象;提高摩擦型消能装置螺栓的预应力量,能有效提升滞回消能面积;提升初始钢绞线预应力量,能使滞回循环远离原点,确保自复位能力;消能装置安装在柱翼板处比安装在柱腹板处有较好的消能能力,且较为经济。预应力钢柱基底含摩擦型消能装置具有良好的自复位能力,具有滞回消能能力且柱构件无残余变形,理论分析亦能准确预测其性能。This research aims to investigate the seismic behavior of post-tensioned steel column base with friction energy dissipation devices,and study the effects of initial post-tensioned force of strands and energy dissipation devices.The column and foundation is connected by using high-strength strands to provide self-centering behavior,and the energy dissipation devices utilizing friction are to provide hysteretic behavior.Therefore,the column possesses characteristics of self-centering and no residual deformation.A few critical parameters are studied including initial post-tensioned force,area of energy dissipation,and location of friction energy dissipation devices.The behavior of the joint is evaluated in both analytical and experimental studies.The results show that increasing post-tensioned force of the bolts used for friction energy dissipation devices could effectively enlarge the area of energy dissipation.Increasing the initial post-tensioned force of strands can move up the hysteretic loop and ensure self-centering capacity of column.The energy dissipation devices installed at the column flange rather than column web lead to better energy dissipation behavior and more economic.The joint between column and foundation,with friction energy dissipation devices,possesses self-centering,gap opening and closing at the column-to-foundation interface,energy dissipation characteristics,and no residual deformation on column.Moreover,analytical predictions agree well with experimental data.

关 键 词：预应力 自复位 摩擦消能装置 

分 类 号：TU398[建筑科学—结构工程]