Product Introduction
Description:
High Damping Seismic Isolators
are meticulously engineered standard components designed specifically for seismic isolation in bridges. Developed by China Communications First Highway Survey, Design and Research Institute Co., Ltd., these components adhere to the latest national standards (GB 20688) and industry norms, with additional insights from European standards. These patented innovations, supported by major provincial and ministerial scientific and technological research projects, have undergone rigorous evaluation and certification (Shaan Ke Jian Zi [2010]) No. 097. Now elevated to the transportation industry standard of the People's *** (JT 2009-26), these products are ideally suited for various highways and municipal bridges in regions with earthquake intensity levels of 9 degrees or below.
Isolation rubber bearings offer all the benefits of traditional plate bearings, coupled with enhanced isolation performance that significantly mitigates earthquake-induced damage to bridges. High damping rubber bearings, a subset of isolation rubber bearings, are constructed from advanced high damping rubber materials, achieving a damping ratio between 10% to 16%. While their shape and structure mirror those of natural rubber bearings, their unique rubber material boasts high viscosity, capable of self-energy absorption and remarkable ductility. These bearings elongate the structure's natural vibration period during seismic events, thereby reducing seismic forces. Leveraging their inherent energy dissipation properties, they provide seismic isolation comparable to that of lead core sandwich rubber bearings.
Utilizing high damping composite rubber material in place of a lead core, these bearings adjust the filler material proportion to optimize total damping, ensuring robust energy consumption and isolation. High damping rubber bearings exhibit stable performance, exceptional energy dissipation, and remarkable ductility. With higher equivalent viscous damping, they excel in seismic energy dissipation, yielding significant isolation effects that effectively manage the seismic response of isolated structures. The integration of these functions reduces the overall volume compared to lead core bearings, conserving space, simplifying construction, and offering a cost-effective alternative to lead core sandwich rubber bearings.
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