用于高墩的软钢剪切消能器节段足尺模型拟静力试验

Quasi-Static Test of Full-Scale Segmental Model of Mild Steel Shear Energy Dissipator for Tall Piers

软钢消能器在建筑消能减震结构中已得到大量应用,然而,其在桥梁结构中的应用实例还极少。为检验软钢消能器在新型钢管混凝土柱-软钢消能元件组合箱形截面高墩中的工作性能,设计制作了2个用于高墩的软钢剪切消能器节段足尺模型,并开展拟静力试验研究。结果表明:软钢剪切消能器在新型组合箱形截面高墩中可发挥"结构元件""耗能元件"和"牺牲元件"的作用;在相同的平面尺寸下,内嵌软钢板的厚度越大,节段模型的初始弹性刚度、屈服后刚度、承载力和耗能能力越大。研究结果可为新型组合箱形截面高墩设计提供参考。

Mild steel shear energy dissipator(MSSED)has been largely used in building structures with energy dissipation devices.However,the application of MSSED in bridge structure is rare.In order to verify the performance of MSSED in concrete-filled steel tubular(CFST)column-energy dissipating mild steel plate composite tall piers,2 full-scale segmental models of MSSED for tall piers were designed and fabricated,and quasi-static test was carried out.The results show that:the MSSED can play the role of structural element,energy dissipation element and sacrificial element in the new composite box section tall pier;under the same plane size,the greater the thickness of embedded mild steel plate,the greater the initial elastic stiffness,post yield stiffness,bearing capacity and energy dissipation capacity of the segment model.The results of this paper can provide a reference for the design of the new composite box section tall pier.