高土石坝振动台模型试验理论、技术与应用

Theory, Technology, and Application of Shaking TableModel Tests of High Earth-Rockfill Dams

摘要:

对土石坝振动台模型试验理论和技术进行系统阐述，提出基于原型和模型坝料静、动力特性试验的模型相似设计方法和不同强度地震动递进输入（白噪声微振-设计地震-校核地震-破坏试验）的振动试验方法。基于1g大型振动台和ng超重力离心机振动台设备性能现状，结合高土石坝的结构特点和动力试验相似模拟要求，对土石坝振动台模型试验的优势及局限进行深入讨论。结合已有的工程实践，对土石坝振动台模型试验在工程中的应用进行总结，并以某实际高面板堆石坝为例研究面板坝生命周期内经历多次地震情况下结构动力特性的演化规律。

Abstract:

The theory and technology of shaking table model tests on earth-rockfill dams are systematically described and discussed. A model similarity design method based on static and dynamic characteristics tests of a prototypical model dam, and a vibration test method using input from ground motions of different intensities are proposed. Based on the performance parameters of a 1g large-scale shaking table and ng super-gravity centrifuge-shaking table equipment, advantages and disadvantages of shaking table model tests of earth-rockfill dams were analyzed. Combined with existing projects, the application of shaking table tests in earth-rock dam engineering was summarized. The evolution law of structural dynamic characteristics of a high concrete-faced rockfill dam under many strong earthquakes was studied.