Extentions of Hybrid Structural Testing

混合试验是一种模拟结构地震反应的试验技术。由于执行器控制的局限性和直接积分的稳定性约束，这种测试仅适用于柔性结构和/或少自由度结构。本研究的目的是克服混合试验中的困难，使之成为模拟地震反应的更可靠的实验工具。首先，设计了一种新的集成方法，该方法既适用于混合测试，又可以降低稳定性约束。在此基础上，设计了一种数字伺服机构，改善了执行机构的控制性能。在此基础上，建立了一种新的积分算法与数字伺服机构相结合的新型混合测试系统。利用该系统对带有粘滞阻尼器的结构进行了混合试验，并对该系统的有效性进行了标定。测试结果表明，与传统的混合测试系统相比，新系统的执行器控制精度提高了近10倍，而且新的积分算法几乎完全消除了稳定性约束。在试验中，将4种子结构技术与杂交试验的基本原理相结合，并对这种处理的潜力进行了评估。

The hybrid testing is an experimental technique for simulating earthquake responses of structures. Because of the limitation in actuator control as well as the stability constraint in the direct integration, this testing has been employed only for flexible structures and/or structures with few degrees of freedom. The purpose of this study is to overcome those difficulties involved in the hybrid testing and make the testing a more reliable experimental tool for the simulation of earthquake responses. First, a new integration method that is usable to the hybrid testing but yet possible to reduce the stability constraint is devised. Nest, a digital serve mechanism that can improve the actuator control is developed. Then, a new type of hybrid testing system into which both the new integration algorithm and digital servo mechanism are incorporated is established. Using this system, a hybrid test was applied to a structure having a viscous damper, and the effectiveness of the system was calibrated. The test resolts revealed that the new system can provide approximately a 10 times more accuracy in actuator control than conventional hybrid testing systems and also that the new integration algorithm can remove the stability constraint almost completely. In the test, 4substructuring techniques were combined with the basics of the hybrid testing, and the potential of this treatment was also evaluated.