剪切型多自由度结构的层间初始侧移刚度实测方法

用拟动力试验方法研究剪切型多自由度结构的抗震性能，碰到的首要问题是如何测准剪切型多自由度结构的层间初始侧移刚度。该文的研究表明，由于多个作动器之间存在耦合现象，使得采用常规的多作动器测试方法很难测准剪切型多自由度结构的侧移刚度。采用作者改进的单作动器测试方法能够有效地解决多个作动器的耦合问题，准确测出多自由度结构的刚度。通过实例分析表明:采用新方法测试的试验刚度多次测量结果稳定，且与经典的理论分析结果一致，证明了作者推荐的单作动器刚度测试方法的有效性和准确性。

STIFFNESS MEASUREMENT METHOD OF SHEARING MDOF STRUCTURE

How to measure the initial elastic lateral stiffness accurately is the first problem of pseudo dynamic testing for researching seismic performance of shearing MDOF (Multiple Degree of Freedom Systems) structure. Multi-Servo-hydraulic control systems of shearing MDOF pseudo dynamic testing have the phenomena of coupling, leading to difficulties in obtaining true lateral stiffness. A new method of measuring story lateral stiffness (Simple-Servo-hydraulic measure method) is presented in this paper. An example is used to demonstrate that the result of the new method is steady. The analysis results showed the testing results are comparable with the calculate results. The analyses illustrates the accuracy of the proposed method.