Developing a new hysteretic type seismic damper (BRRP) for steel bridges
Developing a new hysteretic type seismic damper (BRRP) for steel bridges
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DOI：
10.1016/j.engstruct.2016.06.033
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发表时间：
2016-10
影响因子：
5.5
通讯作者：
S. Yamazaki;T. Usami;T. Nonaka
中科院分区：
文献类型：
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作者：
S. Yamazaki;T. Usami;T. Nonaka
一种称为屈曲抑制波纹板(BRRP)阻尼器的新型抗震阻尼器已经被开发出来。BRRP阻尼器在形状上类似于BRB(屈曲约束支撑)阻尼器，但其核心构件是二维波纹板而不是一维窄平板。BRRP是用来作为阻尼器的，当它们安装在梁式桥梁的边缘时，它们将在中小地震(在日本被称为“1级地震”)中作为刚性弹性支座，在大地震(在日本被称为“2级地震”)中作为耗能阻尼器。BRRP的目标性能是，它们能够承受超过2级地震(比方说，比2级地震大1.5倍)的地震。通过循环加载试验和数值分析，研究了BRRPS的弹塑性行为，以获得关于其性能的基本知识。研究发现，经过适当设计的BRRPs具有比常规BRRPs更好的变形和低周疲劳性能。
New seismic dampers termed Buckling-Restrained Rippled Plate (BRRP) dampers have been developed. The BRRP dampers are similar in shape to BRB (Buckling-Restrained Brace) dampers, but its core member is a 2D rippled plate instead of a 1D narrow flat plate. BRRPs are intended to be used as stoppers, and when they are installed at the edges of girder-type bridges, they will act as stiff elastic bearings in small to moderate earthquakes (called “Level 1 earthquakes” in Japan) and as energy dissipating dampers in large earthquakes (called “Level 2 earthquakes” in Japan). The target performance of BRRPs is such that they can withstand earthquakes exceeding Level 2 earthquakes (say, 1.5 times larger than a Level 2 earthquake). The inelastic behavior of BRRPs was investigated using both cyclic loading tests and numerical analyses to acquire fundamental knowledge on their performances. It has been found that adequately designed BRRPs exhibit much better deformation and low-cycle fatigue performance than conventional BRBs.