【摘要】 介绍了拟动力试验的几种位移控制方法,并对位移控制过程中产生的误差进行了分析.位移控制误差有下冲误差和过冲误差之分,对拟动力试验过程中的下冲误差和过冲误差的产生机理及各自对弹性体系的不同影响进行了探讨.分析结果表明,下冲误差减少系统阻尼,增加系统能量,使结构的地震反应增大;而过冲误差则相反.另外,弹性体系试验精度对位移控制误差的敏感程度明显高于弹塑性体系,并通过对某一地震观测用的结构输入其实测地震波所进行的拟动力试验结果得到了验证.更多还原

【Abstract】 Some displacement control methods were presented,and the error caused by displacement control was analyzed.There are undershooting and overshooting errors in displacement control error.The development mechanisms of undershooting and overshooting errors and their differential effects on elastic systems were investigated.It was found out that the undershooting error reduces system damping,increases system energy and seismic response,on the other hand the overshooting error has the opposite action.In addition,elastic system is more sensitive than inelastic system in displacement control error that affecting the testing accuracy,which was demonstrated by the pseudo-tests based on a frame model that was constructed for earthquake monitoring,and used the recorded earthquake inputs.更多还原