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中文摘要：
为了提高子结构试验技术对非线性结构的稳定性,把无条件稳定的能量守恒逐步积分方法实施于子结构试验中,提出基于该逐步积分方法的子结构试验方法（以下简称能量守恒子结构试验方法）。采用等效力控制方法求解隐式差分方程。为解决实时能量守恒子结构试验时滞问题,利用三阶外插补偿原理给出时滞补偿时的等效力命令计算公式。实现了非线性防屈曲支撑试件的实时能量守恒子结构试验,试验结果证明了提出的试验方法对非线性结构具有可行性,等效力控制方法解决非线性隐式方程迭代问题是有效的,同时说明应用三阶外插补偿原理进行等效力命令时滞补偿具有很好的补偿效果。
英文摘要：
In order to expand the stability of substructure testing to nonlinear structures,the unconditional stable energy-conserving time integration algorithm is implemented in the substructure test and a substructure testing method based on the algorithm,called energy-conserving substructure testing method,is developed.The equivalent force control method is used to solve implicit difference equations.The computation of equivalent force command with delay compensation is presented using the 3rd-order polynomial compensation for real-time energy-conserving substructure tests.Real-time energy-conserving substructure tests were conducted with nonlinear buckling-restrained brace specimen.The results show that the energy-conserving substructure testing method is successful for nonlinear structures.The tests validate equivalent force control method for nonlinear implicit difference equation.The real-time substructure tests show that the 3rd-order polynomial compensation can effectively compensate the actuator delay.
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