拟静力试验中摩擦力的影响及去除方法

土木工程拟静力试验中经常会使用到加载与反力装置,当作动器施加荷载时,作动器与反力装置之间会产生摩擦力。摩擦力会对试验结果产生影响,特别是对拟动力和混合试验需要位移在线更新的试验影响更大。然而,关于摩擦力对抗震试验影响的研究鲜有报道且去除摩擦力的方法较少。为此,本文通过理论分析研究了摩擦力对抗震试验各参数的影响,并发展了从测量数据中去除摩擦力的方法,减小摩擦力对拟静力试验的影响。

Influence of frictional force and its removal method in quasi-static test

Loading and reaction devices are often used in quasi-static tests in civil engineering. When the load is applied by an actuator, friction force will be generated between the actuator and reaction device. The friction force will have an influence on the test results, especially on the pseudo-dynamic test and the hybrid test which need to update the displacement online. However, there are few reports on the influence of friction on seismic test and few methods to remove friction. Therefore, the influence of friction on the parameters of seismic test is studied through theoretical analysis in this paper, and a method to remove friction from the measured data is developed to reduce the influence of friction on the quasi-static test.