摘要
利用已有试验数据分析了振动台激励波和输出波之间的相干性,包括水平激振、竖向激振以及水平和竖向同时激振方式,采用激励地震波的频率范围为90～350 Hz,台面上振动质量为443 kg,离心加速度为30 g。也分析了对频率为120 Hz正弦波的模拟结果。结果表明,R500B离心机地震模拟振动台对复杂地震波和正弦波具有良好的模拟能力。
R500B shake table installed on IWHR 450 g-t geotechnical centrifuge is the first and largest earthquake simulator capable of simulating earthquake in both horizontal and vertical directions in the world.This paper presents the coherence analysis between the exciting waveform and output earthquake waveform based on available experiment data.The shaking mode includes horizontal excitation,vertical excitation and both excitation simultaneously by using an artificial earthquake wave with a frequency range of 90～350 Hz,and the payload is 443 kg in a 30 g centrifugal gravity field.Simulation of a sine wave of 120 Hz is also analyzed.It＇s shown that R500B shake table has good capability of modeling complex earthquake and sine waves.
出处
《长江科学院院报》
CSCD
北大核心
2012年第4期67-70,79,共5页
Journal of Changjiang River Scientific Research Institute
基金
中国水利水电科学研究院科研专项基金(岩集1121)
关键词
离心模拟
动力试验
振动台
相干分析
centrifugal modeling
dynamic experiment
shake table
coherence analysis
