EXPERIMENTS ABOUT THE TEMPERATURE DEPENDENCY OF HIGH DAMPING RUBBER BEARINGS DUE TO THE DIFFERENCES OF SHEAR STRAIN AND VERTICAL COMPRESSIVE STRESS

2020 ◽  
Vol 76 (4) ◽  
pp. I_507-I_515
Author(s):  
Takehiko SAITO ◽  
Yasuyuki NAKAMURA ◽  
Kosuke TAKENOUCHI ◽  
Nobuhiro YAMAZAKI ◽  
Yasunori MIYAMORI ◽  
...  
Keyword(s):  
Shear Strain ◽  
Compressive Stress ◽  
Temperature Dependency ◽  
High Damping Rubber Bearings ◽  
High Damping Rubber ◽  
Rubber Bearings

Hysteretic Restoring Force Characteristics of High Damping Rubber Bearings Under High Compressive Stress

2004 ◽  
Author(s):  
Yasuhiro Kasahara ◽  
Shigenobu Suzuki ◽  
Takashi Kikuchi
Keyword(s):  
Compressive Stress ◽  
Seismic Isolation ◽  
Damping Ratio ◽  
Loading Test ◽  
Restoring Force ◽  
Scaled Model ◽  
High Damping Rubber Bearings ◽  
High Damping Rubber ◽  
Rubber Bearings ◽  
Force Characteristics

Hysteretic restoring force characteristics — shear stiffness, equivalent damping ratio, and ultimate properties — of seismic isolation bearings are significantly affected by compressive stress. In this study, dependence of shear properties of high-damping rubber bearings (HDR) on the compressive stress σ and secondary shape factor S2 was studied by dynamic loading test with scaled-model and static loading test with full-scale isolators. The results highlighted the high compressive stress dependency on restoring force characteristics of HDR with the isolator of relatively small S2. It is concluded that large S2 is desired when isolators are designed for high compressive stress. The applicability of HDR under high compressive stress was experimentally verified.

Performance of high-damping rubber bearings for seismic isolation of residential buildings in Turkey

2021 ◽  
Vol 143 ◽  
pp. 106620
Author(s):  
N. Murota ◽  
S. Suzuki ◽  
T. Mori ◽  
K. Wakishima ◽  
B. Sadan ◽  
...  
Keyword(s):  
Seismic Isolation ◽  
Residential Buildings ◽  
High Damping Rubber Bearings ◽  
High Damping Rubber ◽  
Rubber Bearings

scholarly journals INVESTIGATION OF SEISMIC PERFORMANCE OF HIGH DAMPING RUBBER BEARINGS FOR ISOLATED BRIDGES USING REAL-TIME SUBSTRUCTURE HYBRID LOADING TEST METHOD

2007 ◽  
Vol 63 (1) ◽  
pp. 265-276 ◽  
Author(s):  
Yong YUAN ◽  
Hirokazu IEMURA ◽  
Akira IGARASHI ◽  
Tetsuhiko AOKI ◽  
Yoshihisa YAMAMOTO
Keyword(s):  
Real Time ◽  
Seismic Performance ◽  
Test Method ◽  
Loading Test ◽  
High Damping Rubber Bearings ◽  
High Damping Rubber ◽  
Rubber Bearings ◽  
Isolated Bridges

Seismic Analysis and Comparison of Different Base Isolation Systems for a Multi-Storey RC Building with Irregularities in Plan

2012 ◽  
Vol 594-597 ◽  
pp. 1788-1799 ◽  
Author(s):  
Donato Cancellara ◽  
Fabio de Angelis
Keyword(s):  
Base Isolation ◽  
Seismic Analysis ◽  
Cyclic Behavior ◽  
Isolation System ◽  
High Damping Rubber Bearings ◽  
Fixed Base ◽  
Base Isolation System ◽  
High Damping Rubber ◽  
Isolation Systems ◽  
Rubber Bearings

In the present paper the dynamic nonlinear analysis for a 3D base isolated structure is illustrated. A base isolated reinforced concrete building is designed and verified according to the European seismic codes such that the superstructure remains almost completely elastic and the nonlinear elements are localized only in the base isolation system. Nonlinear hysteretic models have been adopted to reproduce the cyclic behavior of the isolators. Two different base isolation systems are considered and their performances are compared for evaluating the behaviour of a base isolated building, highly irregular in plan, in presence of a seismic excitation defined with recorded accelerograms which characterize the bi-directional ground motions. The isolation system has been realized with a combination in parallel of elastomeric bearings and sliding devices. In the first analyzed isolation system we have used the High Damping Rubber Bearings (HDRB) and in the second analyzed isolation system we have used the Lead Rubber Bearings (LRB). Finally a comparative analysis between the base isolated structure with hybrid base isolation systems and the conventional fixed base structure is detailed.

Analysis and Experiment on the Effect of Seismic Protection of Buildings by High Damping Rubber Bearings

2004 ◽  
Author(s):  
Jun-Ping Pu ◽  
C. S. Tsai ◽  
Jian-Fa Huang ◽  
Bo-Jen Chen ◽  
Yao-Min Fang
Keyword(s):  
Earthquake Engineering ◽  
Base Isolation ◽  
Steel Structure ◽  
Shaking Table ◽  
Natural Period ◽  
Rubber Bearing ◽  
High Damping Rubber Bearings ◽  
High Damping Rubber Bearing ◽  
High Damping Rubber ◽  
Rubber Bearings

In recent years, many studies on base isolation strategies and devices have been developed and applied in U. S. A., Europe, Japan, and New Zealand. The high damping rubber bearing belongs to one kind of the earthquake-proof ideas of base isolation technologies. The installation of high damping rubber bearings can lengthen the natural period of a building and simultaneously reduce the earthquake-induced energy trying to impart to the building. The objective of this paper is to investigate the base isolation effect of high damping rubber bearings. The uniaxial, biaxial, and triaxial shaking table tests were performed to study the seismic behavior of a 0.4-scale three-story isolated steel structure in the National Center for Research on Earthquake Engineering in Taiwan. The experimental and analytical results show that the nonlinear mechanical characteristics of the high damping rubber bearings can be reasonably simulated.

Test of Thick Rubber Bearings on its Compressive Properties

2014 ◽  
Vol 919-921 ◽  
pp. 348-354 ◽  
Author(s):  
Hao Wen Chen ◽  
Peng Pan ◽  
Jun Cai Liu ◽  
Yu Sakurai ◽  
Masahiro Nakamura ◽  
...  
Keyword(s):  
Vibration Control ◽  
Steel Plates ◽  
Temperature Dependency ◽  
Test Results ◽  
Compressive Properties ◽  
Frequency Dependency ◽  
Current Design ◽  
High Damping Rubber ◽  
The Many ◽  
Rubber Bearings

Vibration is an important comfort issue for the metro surrounding buildings. Among the many methods of subway vibration control, building isolation is the necessary supplement to the track isolation for metro surrounding buildings with sensitive constructive forms or specific comfort needs. Laminated rubber bearings are widely used for the building isolation. In order to further improve the isolation effectiveness, researchers intend to use laminated rubber bearings with relatively thick rubber layers. However, the frequency dependency and temperature dependency are not well explored for the thick rubber bearings. And since constrains from the steel plates to rubber layers are relatively small for thick rubber bearings, its not clear if it is accurate to simply apply the equations for common laminated rubber bearings to the thick ones. In this paper, a compressive properties test is carried out for both thick and thin rubber bearings. Both thick and thin rubber bearings are manufactured by a kind of High Damping Rubber (HDR) and a kind of Nature Rubber (NR). The frequency dependency and temperature dependency are tested. The accuracy of applying the current design equations to thick rubber bearings is discussed based on the test results.

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