西南交通大学8m×10m地震模拟振动台运行对场地振动的影响分析

Experimental Study of Field Vibration Influence Induced by the 8m×10m Shake Table of Southwest Jiaotong University

摘要:

西南交通大学建成的8m×10m/160t振动台是目前国内规模最大的振动台，对其运行质量和振动影响进行评价具有示范效应。探讨该振动台振动影响的现场实验于2017年初展开，实测结果表明：该振动台在工作频段内受控性能很好，对地震动信号重现度很高；台面满载满负荷运行时实验室建筑基础10m以内地面振动加速度实测值不超过6.6gal，振动速度小于2mm/s，不会对实验室厂房及附属办公建筑的安全、使用舒适性及人们正常工作、生活造成不利影响。

Abstract:

The free-field vibration induced by the 8m×10m/160t shake table was analyzed and measured. The shake table performs well with good frequency response and high reproducibility for strong ground motion signal. The induced free-field acceleration within 10m from the shake table foundation is only 6.6gal while the table runs at its full capacity,and the induced velocity is less than 2mm/s. Therefore,the full load operation of the shake table has no significant impact on human bodies and safety of buildings.