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采用分布式混合试验系统模拟四层钢结构框架在强震下的倒塌行为。变形集中的首层作为试验对象,而上部结构作为数值子结构。各子结构通过协调器满足界面上的平衡和协调条件,并被协调器的输入输出接口封装起来。采用柔性的试验方案,可以在当前有限控制精度的限制下,灵活地处理边界条件。试验结果与日本E-D efense振动台足尺试验结果进行了对比,得到了类似的倒塌机制,证明混合试验有能力进行结构倒塌模拟,而误差主要来自于模型简化。
A distributed hybrid test system was used to simulate the collapse behavior of four-story steel frame under strong earthquakes. The first floor of the deformation set is used as the test object, while the superstructure is used as the numerical substructure. Each substructure through the coordinator to meet the interface balance and coordination conditions, and was coordinator input and output interface package up. With the flexible experimental scheme, the boundary conditions can be flexibly dealt with under the limitation of the current limited control precision. The experimental results are compared with the results of the full-scale test of the E-D efense shaker in Japan, and a similar collapse mechanism is obtained. It is proved that the hybrid test has the ability to simulate the structural collapse and the error mainly comes from the model simplification.