胶合木-混凝土混合结构动力特性研究

摘要

现代木结构的动力特性还有待进一步研究.根据一次地震模拟振动台试验,采集了三层缩尺胶合木-混凝土竖向混合结构地震响应的原始振动数据.经过分析和处理后,使用传递函数法得到了结构的前三阶动力特性.结果表明,结构阻尼比在2%~10%之间,且随结构损伤积累增加而增大,结构频率随刚度退化而下降.刚度比较大的混合结构振动主要表现为一阶振型,且上下层连接良好,协同工作能力较强.%The dynamic characteristics of the modern wood structure should be further studied.Vibration data of a 3-storey glued wood-concrete hybrid structure were processed and analyzed from a shaking table test simulating an earthquake.After analysis and processing, the first three order dynamic characteristics of the structure are obtained by using the transfer function method.The results show that the damping ratio of the structure increases from 2% to 10% with the increase of damage accumulation, while the frequency of structure decreases with the decrease of stiffness.The vibration of mixed structure with large stiffness ratio is mainly manifested by the first order mode, and the upper and lower connection is good, showing a strong cooperative work ability.