摘要
本文根据２１片部分预应力混凝土Ｔ梁疲劳试验结果，分析了在重复荷载作用下箍筋的应力变化情况以及变幅荷载对箍筋应力的影响。提出了用瞬时荷载下箍筋的总应变做为箍筋损伤的量度；利用等损伤原则，从而沟通了变幅荷载与常幅荷载之间的关系。所建议的各个公式与国内外现有试验结果比较均有较好的吻合性，可供修订规范及设计参考。
Based on the fatigue test tesults of 21 PPC beams , the effects on stirrup s stress under repeatted load and load with changing fluctuation were analysed.It is suggested that the damage in the stirrup should be measured by the total strain of stirrup duc to instantaneousload;in the light of the principle of equivalent damage, the relation between the effects of the load with steady fluctuation and the load with changing fluctuation is given. Formulae given here can give results quite well coincident with many tests in China and abroad.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1994年第4期391-397,共7页
Journal of Southwest Jiaotong University
关键词
预应力混凝土
梁
疲劳
箍筋
prestressed concrete
beams
shear
fatigue
cyclic
load
partial prestressed concrete
