预应力混凝土弯曲拉-压疲劳性能试验研究  

EXPERIMENTAL STUDY ON BEHAVIOR OF PRE-STRESSED CONCRETE UNDER FLEXURAL TENSION-COMPRESSION FATIGUE LOADING

作　　者：张继文[1] 曾俊铖[1] 张振兴 涂永明[1] 吕坚品[1] 

机构地区：[1]东南大学土木工程学院,南京210096 [2]中国联合工程公司,杭州310022

出　　处：《工业建筑》2009年第8期72-75,共4页Industrial Construction

基　　金：铁道部科技研究计划重点项目(2006Z2007);教育部博士点基金新教师项目(20070286095)

摘　　要：针对高速铁路上预应力混凝土声屏障结构中遇到的弯曲拉-压疲劳状态,进行4片预应力混凝土悬臂板的6个等幅反复荷载作用下的弯曲拉-压疲劳试验。在试验的基础上,给出相应的S-N方程,并将试验结果同其他文献结果进行比较,分析了混凝土的弯曲抗拉疲劳强度、预应力钢筋的有效预应力在反复荷载作用下的损失率。结果表明：混凝土弯曲拉-压疲劳性能优于其轴心拉-压疲劳性能;疲劳荷载作用而产生的有效预应力损失率在3%-6%。研究结果可为预应力混凝土结构的疲劳抗裂设计、分析提供依据。The fatigue tests of flexural tension-compression under constant amplitude cyclic loading have been carried out on pre-stressed concrete cantilever plates against the fatigue state of flexural tension-compression in pre-stressed concrete noise barrier used in high-speed railway.The results of the tests have been presented in the relationship of S-N and compared with those obtained by other researchers.It is also analyzed that tensile fatigue strength of the concrete and the loss rate of effective pre-stress under cyclic loading ranged from 3% - 6%. The results of investigation furnish the evidence for the design and analysis of fatigue crack resistance for pre-stressed concrete structure under cyclic loading.

关 键 词：高速铁路 声屏障 预应力混凝土 疲劳 抗裂性 正截面 

分 类 号：TU378[建筑科学—结构工程] TU375.1