提出了一种具有限位功能的新型防屈曲支撑（LBRB），该支撑在普通防屈曲支撑上设置限位装置，实现小变形时正常发挥防屈曲支撑的耗能作用，大变形时防屈曲支撑的外约束体提供附加刚度，限制变形的进一步发展。通过6个LBRB构件的拟静力试验，研究限位距离、工作段截面积、工作段长度、钢芯与夹持钢管之间间隙等因素对滞回性能的影响，结果表明：构造合理的LBRB构件具有良好的耗能能力并能在大变形时提供附加刚度。%A new type buckling restrained brace with displacement stopper(LBRB)was proposed here.The energy-dissipation function of a typical buckling restrained brace was performed under smaller deformation and the additional stiffness was provided by the outer restraint element under larger deformation.Thus,the deformation could be limited to a certain level.Pseudo-static tests of 6 LBRB specimens were carried out to investigate the influence of limited distance,working section area,working section length,and clearance between steel core and clamping steel tube on the LBRB's hysteretic behavior.The results showed that the LBRBs with resonable structures have a good energy-dissipation ability and can provide an additional stiffness under larger deformation.
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