Effects of seismic action and material properties variations on seismic responses of base-isolated nuclear containment structure

Zhuang, Chu-Li; Zhang, Yongshan; Wang, Dayang

doi:10.1016/j.anucene.2017.08.007

Cited by 2 publications

(2 citation statements)

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“…Earthquake Engineering Research Center (EERC) conducted a series of experimental studies to determine the mechanical characteristics of three types of seismic isolation systems 37 . In this study, high damping rubber bearing with high shear modulus, high damping rubber bearing with low shear modulus, and lead‐core rubber bearings were used 38 . These bearings have been subjected to horizontal hysteretic displacement tests at various vertical load and loading frequencies, and the relationship between the shear stiffness and damping ratio properties of the bearings with the shear deformation has been investigated in these tests.…”

Section: Introductionmentioning

confidence: 99%

“…37 In this study, high damping rubber bearing with high shear modulus, high damping rubber bearing with low shear modulus, and lead-core rubber bearings were used. 38 These bearings have been subjected to horizontal hysteretic displacement tests at various vertical load and loading frequencies, and the relationship between the shear stiffness and damping ratio properties of the bearings with the shear deformation has been investigated in these tests. High damping rubber insulators were developed by the Malaysian Rubber Producers' Research Association (MRPRA) in 1982.…”

Section: Introductionmentioning

confidence: 99%

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Rubber effect on metallic dampers used on the supports of steel cross members

Balik

Bahadir

2023

Structural Design Tall Build

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Summary There are many strengthening methods made with steel cross members for strengthening the structures with inadequate earthquake behavior. This type of strengthening methods is also effective in buckling of the cross members in the behavior of the structural frames. This buckling may cause partial or complete collapse of the structure. Thus, it is quite important to prevent and limit the formation of buckling in steel crosses. At the TEC 2018, the insulation unit is defined as the elements that can exhibit flexible behavior on the horizontal direction and rigid behavior on the vertical direction under the effect of earthquake loads. The basic principle of using insulation units is that these members can dissipate energy in the carrier system. The originality of this study is to experimentally investigate the damper behavior created by using cylindrical rubber wedges, which can be easily found in the automotive industry, in combination with steel plates and bolts. In this experimental study, the contribution of seismic insulators to the structural element to be strengthened was investigated. The insulators used in this study are considered by analogy with lead‐core rubber insulators. As such seismic lead‐core rubber insulators move under the influence of lateral loads, the lead core inside makes plastic deformation, thus increasing the damping rate. In this insulator study, it is aimed to use U plates or bolts instead of lead core. While vertical loads are covered by rubber support, horizontal loads will be damped due to plastic deformation of U plates or bolts. The five types of seismic dampers were used as 10 B‐type rubber wedge mounted damper (SR), 2 U‐type steel plates damper (SP), 10 M6 steel bolted damper (SB), 2 U‐type steel plates and 10 B‐type rubber wedge mounted damper (SPR), 10 M6 steel bolted, and 10 C‐type rubber wedge mounted damper (SBR). These specimens were tested under lateral loading and constant vertical loading. The results obtained at the end of the tests shall be compared considering the strength, stiffness, and dissipated energy capacities of the specimens.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%