中文摘要：

主要研究基于速度控制法的实时子结构实验系统．与传统的基于位移控制的实时子结构实验系统相比，本实验系统运用高速数字信号处理器，对信号实时采集、传输、逻辑判断与控制，使控制与计算程序简洁化，有效减少了时滞误差；同时，在实验系统中运用OS（operator splitting）数值积分法及相应的实验误差校正法，控制加载装置的速度；在实验系统中充分考虑隔震橡胶支座的速度相关性，可详细地研究橡胶隔震支座对桥梁结构的隔震效果．

英文摘要：

This paper presents an investigation of the development of real-time substructure hybrid loading test system based on the velocity-based loading concept, The developed components of the loading test system include a real-time test control algorithm based on the velocity-based loading concept, a PC-DSP control system framework for the actuator signal processing, and the operator splitting（OS） used as the numerical time integration scheme. The PC-DSP control system can detect the real-time experimental control signal. The complex programming and time lag can be avoided with the operator splitting analysis method. The velocity-dependent behavior of rubber bearing is fully considered in the test system. So, the development of real-time substructure hybrid loading test system successfully pursues aceurate prediction of the dynamic response and isolation effects of rubber bearings under realistic earthquake conditions.