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为研究双向地震作用下预制板砖砌体房屋结构的抗震性能评价方法,进行1∶2比例模型的双向拟动力试验。通过介绍试验中结构刚度和频率的变化,提出基于频率变化的抗震性能评价方法,评价结果与基于刚度退化的方法接近,但计算过程更加简捷。基于频率的评价结果与实际破坏状态也较吻合,说明该方法可以应用于预制板砖砌体房屋结构的抗震性能评价。
In order to study the seismic performance evaluation method of prefabricated masonry buildings under bidirectional earthquake, a two-way quasi-dynamic test of 1: 2 ratio model was carried out. By introducing the changes of structure stiffness and frequency in the experiment, the seismic performance evaluation method based on frequency change is proposed. The evaluation results are close to those based on the stiffness degradation, but the calculation process is more simple. The results based on frequency are in good agreement with the actual failure states, indicating that this method can be applied to evaluate the seismic performance of prefabricated masonry building structures.