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

ISOLATED EFFECTION OF THE XIAZHANG CROSS-SEA ISOLATED BRIDGE

2011 ◽  
Vol 05 (03) ◽  
pp. 297-307 ◽  
Author(s):  
YONG YUAN ◽  
HONG PING ZHU
Keyword(s):  
Real Time ◽  
Base Isolation ◽  
Axial Loading ◽  
Test System ◽  
Test Method ◽  
Loading Test ◽  
The Real ◽  
Isolation Effects ◽  
High Damping Rubber ◽  
Rubber Bearings

In this study, the real-time hybrid loading test system based on the velocity-based loading concept is developed. The test system utilizes the concepts of the real-time hybrid loading test method and the substructure technique to combine the loading process of rubber-bearing specimens and numerical modeling of bridge columns and girders. Newly developed components of the loading test system include: an axial loading device especially devised for the fast loading of rubber bearings, and a real-time test control algorithm using the velocity-based loading concept, implemented to a PC-DSP system framework for the actuator control signal processing. A series of real–time hybrid loading tests on natural rubber (NR), high-damping rubber (HDR), and super-high-damping rubber (HDR-s) bearings are conducted using the test system. The objective of this study is to pursue accurate prediction of the dynamic response and base isolation effects of rubber bearings under realistic earthquake conditions. Specifially, the base isolation effects of HDR-s bearing are discussed. Based on the test results, it is clarified that the HDR-s bearing is more effective than the HDR and NR 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.

Seismic Performance of a Multi-Span RC Highway Bridge with High Damping Rubber Bearings

2013 ◽  
Vol 540 ◽  
pp. 69-78 ◽  
Author(s):  
Yong Li ◽  
Jin Jie Wang ◽  
Jing Bo Liu
Keyword(s):  
Seismic Performance ◽  
Damping Ratio ◽  
Time History ◽  
Highway Bridge ◽  
Seismic Excitations ◽  
High Damping Rubber Bearings ◽  
History Analysis ◽  
High Damping Rubber ◽  
Dynamic Time ◽  
Rubber Bearings

Based on the nonlinear dynamic time history analysis, a multi-span RC highway bridge with high damping rubber bearings was studied, to investigate the damping ratio and seismic performance of the bridge and high damping rubber bearings compared with the rubber bearings. Results show that the application of high damping rubber bearings can reduce the seismic response of substructures of the bridge under longitudinal and transversal seismic excitations to some extent. But what is more important is that high damping rubber bearings wont suffer shear and displacement failure which may happen on rubber bearings. As a result, the pounding response and residual displacement can be dispelled.

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
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