疲労・衝撃3

[2151] EXPERIMENTAL STUDIES ON THE FATIGUE PERFORMANCE OF RC BEAMS UNDER COMBINED WET FATIGUE AND FREEZING-THAWING

秦筵越¹, 松谷凱生¹, 高橋佑弥¹, 木田秀人² (1.東京大学 2.ショーボンド建設)

キーワード：wet fatigue、freezing-thawing、fatigue test、disintegration

Lab-scale reinforced concrete (RC) beams were fabricated and subjected to three-point bending fatigue tests. Parameters changed in the tests include the fatigue load level, curing condition, curing age, fatigue type (dry or wet), and damage by freezing-thawing cycles (FTC). Experimental results show that the disintegration-like deterioration can only be observed in wet fatigue tests under bending failure. The significant reduction in fatigue life is observed in the small-scale specimen with severer FTC damage induced at earlier material age in relatively small specimen.