摘要
以预应力简支梁为例,通过AN SY S有限元分析了预应力钢筋混凝土一阶固有频率与力筋预应力大小、布筋方式、裂缝深度以及裂缝位置的影响关系.结果表明:力筋预应力、裂缝、布筋方式对梁的自振特性有较大的影响.所得结果对预应力构件的健康监测有参考意义.
The first natural frequency of a simply-supported pre-stressed beam with crack is studied by ANSYS software.The internal relationships between the first natural frequency and the pre-stressing force,the location of the steels,the location and depth of a crack are obtained.The results show that the effects of the pre-stressing force,crack length and steel location on the first modal frequency are very strong.The present results are helpful to examine the health state of pre-stressed beam.
出处
《华中科技大学学报（城市科学版）》
CAS
2006年第z2期83-85,共3页
Journal of Huazhong University of Science and Technology
关键词
预应力
裂缝
钢筋混凝土梁
固有频率
有限元
pre-stressed force
crack
reinforced concrete beam
natural frequency
finite element
