8.地震による構造物の非線型振動序説
スポンサーリンク
概要
- 論文の詳細を見る
Vibration problems of structures have been studied merely on the case of linear small vibration by many students for different purposes, regarding a structure as a system of multiple degrees of freedom or a continuous body in one dimensional co-ordinate. When we theoretically study the response of structures to a violent earthquake from a view-point to establish a standard of earthquake-proof design of buildings, it is apparently insufficient to be confined to the linear small vibrations in the stationary state. If we are to design a structure without admitting any little local failure in our country where we must fear destructive earthquakes, the building structure will cost very high and we should almost give up to design a sky-scraper economically. So we will have to consider that "seismic safety" must be defined from the view-point of admitting some partial failures of the structure. In order words, some partial failures in the event of destructive earthquake must be admitted if they do not lead buildings to collapse and buildings can regain earthquake-resistance by afterwards repairs. Hence, it is positively necessary to study vibration problems not only for linear vibration but also for nonlinear vibration beyond the limit of small amplitude. Considering above circumstances, the authors analyzed first the nonlinear vibrations in the unstationary state, idealizing a structure as a single mass system by using graphical methods introduced by E. Meissner and L.S. Jacobsen. Although Meissner's and delta methods had been especially applicable to single mass structures and not been extended to multiple mass problems, in this paper the authors tried to extend these methods to multiple mass system to make progress on our studies. Finally, combining many solutions corresponding to several ground displacements and nonlinear character of structures, the authors made in this paper a consideration on the design of structures subject to destructive earth tremors.
- 1955-09-30
論文 | ランダム
- 木炭と竹炭の施用が水稲の生育及び収量に与える影響(日本作物学会四国支部第42回講演会講演要旨)
- マメ科草生マルチ不耕起水稲栽培における潅水管理が水稲の生育と収量および緑肥由来養分の溶出に与える影響(日本作物学会四国支部第42回講演会講演要旨)
- 24 ^C, ^Nトレーサー法による水田土壌中の土壌微生物バイオマスを中心とした炭素・窒素動態の解析(関西支部講演会,日本土壌肥料学会 支部講演会講演要旨集 2005年度)
- 21-1 竹炭と木炭の道路植樹帯への敷設効果(第2報) : 敷設8ヶ月目までの雑草抑制および土壌理化学性に対する効果(21.緑化技術,日本土壌肥料学会 2005年度大会講演要旨集)
- 19-34 同位体希釈法による下水汚泥資材施用水稲栽培土壌の窒素動態解明(19.肥料および施肥法,日本土壌肥料学会 2005年度大会講演要旨集)