@article{oai:nagoya.repo.nii.ac.jp:00030935,
 author = {Shimada, Shizuo},
 issue = {1},
 journal = {Memoirs of the Faculty of Engineering, Nagoya University},
 month = {Nov},
 note = {Two of the tallest reinforced concrete chimneys are still in use at two smeltry plants in Hitachi and Saganoseki, Japan. Their construction periods were between 1914 and 1916. One of them, the Saganoseki Chimney, was attackd by a local earthquake in 1968 and this caused the top 10 meters in length fell down. Surveys were carried out in connection with their future lives as well as aseimic capacities. Besides of material tests, vibrational observations were carried out on the foot of chimneys using a new developed methodology based on statistical analysis. The vibration data were processed by a computer and graphically displayed on a sheet aided by an automated plotting device. A running spectrum presentation has been developed by the author for precise estimation of natural frequencies. It is found that the chimneys will be safe for 30 years or more in future unless a strong earthquake directly his them.},
 pages = {113--157},
 title = {Aseismic surveys of existing tall concrete chimneys},
 volume = {28},
 year = {1976}
}