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为了研究广东科学中心E区的抗震性能,提高结构的抗震安全性,有效保护结构室内设备、仪器和展品的安全,采用了1∶35的比例制作缩尺模型,对该模型进行了模拟地震振动台试验,分析对比了固接、隔震、消能三种模型在不同地震作用下的动力特性和地震反应。试验采用场地波、El Centro波、Taft波等三种地面运动,以不同的地震加速度幅值进行X,Y,Z三个主轴方向的地震试验。试验测得的数据和试验时的宏观现象进行综合分析结果表明,固接结构、消能结构、隔震结构在7度小震、中震、大震作用下,自振周期变化均控制在10%以内,可以认为结构基本上均处于弹性工作阶段。采取隔震措施,可以明显改善结构的抗震性能,对于平面不规则结构,更能改善结构的抗扭性能,提高结构的抗震安全性。
In order to study the seismic performance of Area E of Guangdong Science Center, improve the aseismic safety of structures and effectively protect the safety of indoor structures, instruments and exhibits, a 1: 35 ratio scale model was used to simulate the seismic vibration Bench test, analyzed and compared the dynamic characteristics and seismic response of the three models of fixed, isolated and energy dissipated under different earthquake. Three kinds of ground motions, such as field wave, El Centro wave and Taft wave, were used in the experiment to carry out the earthquake tests of X, Y and Z directions with different amplitude of earthquake acceleration. The results of the test and the macroscopic phenomena of the test show that the periodic changes of the natural vibration of the fixed structure, energy dissipation structure and isolation structure under the action of small earthquakes of 7 degrees, medium earthquakes and large earthquakes are all controlled at 10 %, You can think that the structure are basically in the flexible work stage. Taking seismic isolation measures can obviously improve the seismic performance of the structure. For the irregular structure of the plane, the anti-torsion performance of the structure can be improved and the seismic safety of the structure can be improved.