【摘要】 超重力振动台（Higee shaker）平行试验是检验岩土抗震计算分析方法和试验技术发展能力的一种重要方法。针对国际平行试验结果离散问题引起试验技术可靠性的广泛争议，阐述了DCIEM–40超重力振动台的荷载控制、模型制备、数据测量等试验关键技术，并通过改变单一因素的2组平行试验，探讨不同条件下平行试验结果的一致性和可比性，验证了开展平行试验的可行性与关键技术的可靠性。结果表明：（1）等幅正弦扫频波与白噪声波相比具有频率连续、幅值均匀的特点，更利于识别试验模型的卓越和自振周期；不同离心加速度、幅值强度下，压缩地震波获得的原型波形基本一致，平均峰值偏差最大为2.99%，谱面积误差最大为9.86%。（2）同一模型中，不同深度下的静力孔隙水压力值、场地卓越周期与理论值基本相等，相同深度下不同水平位置超静孔隙水压力比、加速度动态响应吻合，且两者在幅值和相位上具有良好相关性，表明了模型制备和静动态测量的准确性。（3）平行试验中，不同模型相同位置的加速度、超静孔隙水压力比、位移记录值基本吻合，进一步验证了模型制备和试验测量技术的稳定性与可重复性；同时改变单一因素下不同土体、结构的多物理量地震响应均具有明显差异，证明了平行试验的可比性和可行性。研究成果为我国现有超重力振动台运行、新设备研制及标准化与规范化试验技术提供了借鉴。更多还原

【Abstract】 The parallel testing of the High Gravity Technology Shaker(Higee shaker) is a crucial method for evaluating the effectiveness of geotechnical seismic calculation and analysis techniques, as well as for advancing test technology. This study addresses the widespread controversy regarding the reliability of test technology due to the discrepancies observed in international parallel test results. It elaborates on the key technologies of the DCIEM-40 Higee shaker, including load control, model preparation, data measurement, and other testing procedures. By modifying two sets of parallel tests under a single variable, this research explores the consistency and comparability of results obtained under different conditions, thereby verifying the feasibility of conducting parallel tests and the reliability of the associated key technologies. The findings indicate that:(1) The constant-amplitude sine sweep motion exhibits continuous frequency and uniform amplitude characteristics compared to white noise waves, making it more effective for identifying the quality and self-oscillation cycles of the test model. The compression seismic waves generated with varying centrifugal accelerations and amplitudes yield nearly identical prototype waveforms, with an average peak deviation of at most 2.99% and a maximum error in the spectral area of 9.86%.(2) The values of the excess pore water pressure ratio at different horizontal positions at the same depth, as well as the excellence cycle of the site, are generally consistent with the theoretical values within the same model. The measured periods closely align with the theoretical values, and the dynamic responses of the excess pore water pressure ratio and acceleration at different depths exhibit strong correlation in both amplitude and phase, confirming the accuracy of model preparation and static dynamic measurements.(3) In parallel tests, the acceleration, excess pore water pressure ratio, displacement, and recordings at the same locations across different models show considerable agreement, further substantiating the stability and repeatability of the model preparation and experimental measurement techniques. Additionally, the multi-physical seismic responses of various soils and structures under the influence of a single variable demonstrate significant differences, thereby validating the comparability and feasibility of the parallel tests. The results of this research provide valuable insights for the operation of existing Higee shakers, the development of new equipment, and the standardization and normalization of test technology in China.更多还原