摘要
通过9组32m铁路预应力混凝土标准梁的缩尺模型,对掺用超细粉煤灰的预应力混凝土梁在重复荷载作用下的力学性能进行研究,探讨粉煤灰掺量,混凝土等级以及养护条件等因素对铁路桥梁粉煤灰预应力混凝土梁力学性能的影响。试验结果表明:经200万次重复加载后,模型梁静力及动力特性与加载前相比基本不变,超细粉煤灰的合理掺用对梁体疲劳性能没有不利影响,为铁路桥梁粉煤灰预应力混凝土设计参数的选取及应用提供技术支持。
Based on the tests of 9 sets of model beams of railway prestressed concrete, the fatigue behavior of prestressed concrete beams with ultra - fine fly ash and the effects of the railway prestressed concrete bridge caused by the amount of uhra - fine fly ash, concrete grade, and curing condition were studied. The results show that the static and dynamical characteristic are not changed after two million repeated load. The fatigue behavior of railway prestressed concrete bridge has no disadvantage if the amount of ultra - fine fly ash is moderate. The study provides technical support in design parameter and application for railway prestressed concrete bridge with ultra - fine fly ash.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2008年第4期38-43,共6页
Journal of Railway Science and Engineering
基金
铁道部科技研究开发计划基金资助项目(2000G031)
关键词
疲劳性能
模型试验
超细粉煤灰
铁路桥梁
fatigue behavior
model test
ultra- fine fly ash
railway bridge
