无粘结预应力对简支梁自振频率的试验研究

摘要

对4片不同形式布置的预应力筋和混凝土强度的试验梁模型进行室内试验研究，梁在不同预应力等级和竖向荷载的条件下，进行自振频率数据采集，进而找出自振频率（动刚度）与有效预应力之间的内在联系，确定预应力变化对不同预应力筋布置形式和混凝土强度等级的梁的影响效果。%This article through to four slices of different arrangement forms of prestressed steel beam and concrete strength test beam model of in-door experimental study,the test beam under the condition of different prestress level and vertical load,collect natural frequency date of vibra-tion,and then find out vibration frequency( dynamic stiffness)and the inner link between effective prestress,determine prestress change on dif-ferent arrangement of prestressed steel beam and the influence of strength grade of concrete beam effect.