附加阻尼网的斜底式TLD减震控制理论与试验研究OA北大核心CSTPCD

The conventional tuned liquid damper(TLD)has limitations such as low effective damping and high water storage.A damping net and sloped-bottom tank tuned liquid damper(DNS-TLD)was proposed.By combining the sloped-bottom tank TLD with a damping net,strengthening liquid sloshing in the tank,the damping ratio was enhanced and the water storage was reduced.A controlled structural mechanical model of the DNS-TLD was proposed to illustrate its damping mechanism.A simple method for estimating the total equivalent damping ratio of the DNS-TLD was presented.The damping performance of additional DNS-TLD and other types of TLDs was compared and analyzed through shaking table test of single steel frame.The test results were compared with numerical simulation results to further verify the damping laws and the accuracy of the calculation method that can predict the total equivalent damping ratio of various types of TLDs.On this basis,a seismic dynamic time analysis was carried out on a 10-storey reinforced concrete frame structure with DNS-TLD to verify the effectiveness of DNS-TLD on the seismic damping control of the actual structure.The results of both shaking table tests and numerical simulations show that DNS-TLD effectively combines the advantages of sloped-bottom tank TLD and damping net,and represents better damping performance,higher damping efficiency and greater robustness and engineering applicability than other types of TLDs.