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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Effects of near-field ground motions and soil-structure interaction on dynamic response of a cable-stayed bridge
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Effects of near-field ground motions and soil-structure interaction on dynamic response of a cable-stayed bridge

机译：近场地震动和土-结构相互作用对斜拉桥动力响应的影响

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Seismic response of cable-stayed bridges is investigated with the main focus pertaining to the effects of near-field ground motions and soil-structure interaction on the dynamic response of the bridges. A 1/60 scale model of a typical cable-stayed bridge was designed and fabricated for the laboratory investigations. Three different types of ground motion records from the 1999 Chi-Chi earthquake, namely far-field, non-pulse near-field, and pulse-type near-field were employed in the experiments and the numerical analysis of the bridge. Laboratory simulation of the soil-structure interaction was accomplished by a box-spring system with interchangeable springs as foundations for the bridge towers. A three-dimensional numerical model of the bridge was developed, and its response was verified by the experimental results. Results from the numerical and experimental investigations indicated that the effects of foundation soil stiffness on the response of the bridge was influenced by the type of input ground motions. The bridge response was amplified when their foundation was in softer soils.
机译：研究斜拉桥的地震响应，重点是近场地震动和土-结构相互作用对桥梁动力响应的影响。设计和制造了典型斜拉桥的1/60比例模型，用于实验室研究。在桥梁的实验和数值分析中，采用了1999年集集地震的三种不同类型的地震动记录，即远场，非脉冲近场和脉冲型近场。土-结构相互作用的实验室模拟是通过一个箱形弹簧系统完成的，该系统以可互换的弹簧作为桥塔的基础。建立了桥梁的三维数值模型，并通过实验结果验证了其响应。数值和实验研究的结果表明，地基刚度对桥梁响应的影响受输入地面运动类型的影响。当它们的基础位于较软的土壤中时，桥梁的响应会放大。

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