Water tank TMD (tuned mass damper) system applied to high earthquake risk regions to improve vertical response of seismic isolation design

Abstract

The invention provides a water tank TMD (tuned mass damper) system applied to high earthquake risk regions to improve vertical response of seismic isolation design. The water tank TMD system comprisesa water tank, reinforced bottom ring trays and buttresses, wherein the water tank is wholly lifted and separated to have an independent water tank bottom plate; the reinforced bottom ring trays are arranged on side walls of the water tank; the buttresses are arranged between the water tank and the reinforced bottom ring trays; the vertical tuning frequency of the buttresses is shown in the description, wherein sigma K is the vertical total rigidity of all the buttresses and M is the total mass of the water tank, and the total mass includes the sum of the mass of the water tank and the mass offlushing water. The system is used for the high earthquake risk regions in original design in third-generation nuclear power plants. The water tank TMD system applied to the high earthquake risk regions is used to improve the vertical damping effect of foundation seismic isolation design of a nuclear island on the premise that the complete original standard design of upper structures and inner nuclear facilities of the nuclear island is unchanged.

Description

Technical field [0001] The invention relates to a water tank TMD system (TMD is Tuned Mass Damper) used in high seismic risk areas to improve the vertical response of seismic isolation design. Background technique [0002] In high seismic risk areas, the basic seismic isolation design of building structures is the most commonly used seismic technical measure. In order to improve the effect of the basic seismic isolation design, Palazzo et al. combined the basic seismic isolation structure with the TMD structure and proposed BIS-TMD ( Base isolation + FM mass damper) hybrid control of the new structural seismic design concept. However, this approach only focuses on the effects of horizontal earthquakes, and has not yet involved the three-way simultaneous effects of earthquakes. [0003] For nuclear power plants with high seismic risk, our institute believes that only adopting nuclear island basic seismic isolation measures is a safer and more realistic consideration. Our institute...

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Problems solved by technology

[0005] However, comparing the vertical floor spectrum, it can be found that the floor response of the vertical input of 0.40g after seismic isolation generally cannot be enveloped by the non-isolated calculation response spectrum of the 0.30g input, nor can it be enveloped by the relatively conservative original The vertical floor design response spectrum of the standard design 0.30g envelopes the frequency band of interest in the project greater than 7Hz, and the maximum amplitude at the peak is roughly 1.5 times (although the excess value of the peak according to the code can still be achieved after the frequency is widened 0.85% off), but this kind of overrun is recognized all over the world after all, according to the existing mature foundation isolation engineering technology, it is a common design problem that the vertical vibration cannot be absorbed.

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