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。由于作动器控制的限制以及直接积分的稳定性约束，该试验仅用于柔性结构和/或具有较少自由度的结构。本研究的目的是克服混合试验中的这些困难，使试验更可靠的地震反应模拟的实验工具。首先，一个新的集成方法，是可用的混合测试，但仍有可能减少稳定性约束的设计。Nest是一种数字伺服机构，可以改善执行机构的控制。在此基础上，建立了一种新型的混合测试系统，该系统将新的积分算法和数字伺服机构相结合。使用该系统，混合试验应用于具有粘滞阻尼器的结构，并校准系统的有效性。试验结果表明，新系统的执行器控制精度比传统的混合测试系统提高了近10倍，新的积分算法几乎完全消除了稳定性约束。在测试中，4substructuring技术相结合的基础上的混合测试，这种处理的潜力也进行了评估。

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.