基于频率测量的高层建筑地震作用损伤分析

Damage Analysis of High-Rise Building under Seismic Load Based on Frequency Measurement

为寻找一种更有效的地震引起的高层建筑损伤识别方法,在前人研究的基础上,根据地震作用下高层建筑结构自振频率的变化规律,提出了一种新的损伤模型.该损伤模型考虑了高阶振型、振型参与系数、结构形式和结构自振频率测试方法等影响因素.利用所提出的损伤模型对2个高层混凝土结构模型模拟地震振动台试验数据进行了分析,结果表明,该损伤模型与试验现象基本吻合.

Based on the current methods of damage detection, a new detection model was proposed in order to search a more efficient detection method for reinforced concrete high-rise building damage induced by earthquake. This model is based on the regularity of change in the natural frequency of high-rise buildings, and the high order modes, mode participation coefficient and measure method of natural frequency, together with the type of structures, are taken into account in the model. The shaking test results for the two models of reinforced concrete high-rise buildings show that the detection results based on the proposed model are close to the test results.