【摘要】 在MTS815电液伺服岩石试验系统上对40个混凝土圆柱形试件进行了循环荷载作用下的单轴压缩试验。研究了初始荷载、循环频率、循环增幅对混凝土力学行为的影响。结果表明,在初始荷载和循环增幅不变的情况下,循环频率对混凝土强度影响不大。在初始荷载和循环频率不变的情况下,随着循环增幅增加,试件强度减小。在循环频率和循环增幅不变的情况下,随着初始荷载的增加,混凝土强度趋于减小。不可恢复变形随着初始荷载、循环增幅和循环次数的增加而增大,随着循环频率的增加而减小。更多还原

【Abstract】 40 concrete specimens were tested on the MTS815 electro-fluid servo-universal machine for uniaxial compressive experiments to study the effect of initial load,the cyclic frequency and the increment of cyclic load amplitude on the compressive properties of concrete.It is found that with the increasing of cyclic frequency,the strength of concrete has nearly no change,when the cyclic frequency and in crement of cyclic load amplitude are unchanged and with increase of initial load,the strength of concrete tends to be reduced.The unrecoverable deformation of concrete increases as the initial load,the increment of cyclic load amplitude and cyclic times increase and it is reduced as the cyclic frequency increases.更多还原