Product Introduction
Description:
High Damping Seismic Isolators
are a pioneering series of standard components for seismic isolation bridges, ingeniously developed by China Communications First Highway Survey, Design and Research Institute Co., Ltd. These exemplary products align with current national standards (GB 20688) and pertinent industry norms, while also referencing European standards. They are patented innovations, funded by major scientific and technological research projects at the provincial and ministerial levels. This series has triumphantly passed the stringent provincial and ministerial level scientific and technological achievement appraisal (Shaan Ke Jian Zi [2010]) No. 097 and obtained related certifications. Now elevated to the transportation industry standard of the People's Republic of China (JT 2009-26), they are impeccably suited for a broad spectrum of highways and municipal bridges located in earthquake intensity zones of 9 degrees and below.
Isolation rubber bearings exhibit all the excellent performance characteristics of plate bearings, yet they surpass them with superior isolation capabilities, effectively mitigating earthquake-induced damages to bridges. High damping rubber bearings, a specialized type of isolation rubber bearing, are crafted from advanced high damping rubber materials, achieving an impressive damping ratio of 10% to 16%. Their design and structure mirror that of natural rubber bearings, but with the added advantage of high viscosity rubber material, enabling self-energy absorption and remarkable ductility. These bearings can extend the natural vibration period of structures during seismic events, reduce seismic forces, and utilize their energy dissipation properties to serve as seismic isolators, achieving the performance caliber of lead core sandwich rubber bearings.
Employing high damping composite rubber material instead of a lead core, and fine-tuning the proportion of filling material to modify the overall damping, these bearings boast substantial energy consumption capabilities, optimizing isolation reduction. High damping rubber bearings deliver stable performance, robust energy dissipation, and exceptional ductility. With higher equivalent viscous damping, they offer superior energy dissipation and possess significant seismic isolation effects that effectively control the seismic response of isolated structures. By integrating multiple functions, these bearings are compact, saving space, simplifying construction, and are more cost-effective compared to lead core sandwich rubber bearings.
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