掲載雑誌（和）： 日本地震工学シンポジウム講演集 Vol： 5巻 年： 1978年 頁： 1313-1320頁 著者（和）： - タイトル（和）： - 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM 著者（英）： Minoru WAKABAYASHI, Takeshi NAKAMURA, Nozomu YOSHIDA, Satoshi IWAI タイトル（英）： EFFECT OF STRAIN RATE ON STRESS-STRAIN RELATIONSHIPS OF CONCRETE AND STEEL 抄録（英）：
An experimental study is made to investigate the effects of strain rate on the fundamental mechanical properties of component materials of reinforced concrete structures subjected to earthquake load, those are concrete and steel reinforcing bars. Load is applied monotonically or cyclically to a specimen under a prescribed strain rate. Range of strain rates in case of dynamic loading is between 0.005 /sec. and O.1 / sec., taking into consideration of fundamental periods of actual reinforced concrete structures. Compressive strength of concrete increases with the increase of strain rate. On the other hand, a geometrical configuration of stress-strain curve and the strain at maximum stress are hardly affected by strain rate. In case of repeated loading, no significant difference in stress-strain relationship in one to ten cycles of loading is observed in the stress range lower than two thirds of compressive strength and cumulation of strain is observed in further higher stress range. From tension tests or steel bars, it is observed that yield stress increases with increasing strain rate, accompanying the increase of the strain at the beginning of strain-hardening. However, the behavior in strain-hardening region and the strain at breakage are not affected largely by strain rate. There is no significant, difference between the envelope curves of stress-strain relationships under repeated loading and the stress-strain curves under monotonic loading. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集