碾压混凝土坝成层软弱结构水弹性试验模拟

面向碾压混凝土坝流激振动问题精细化模拟研究的需要,总结了碾压混凝土坝成层结构的特性,并基于水弹性模型试验,对碾压混凝土坝的成层软弱结构模拟方法进行了研究,提出了带碾压成层结构水弹模型模拟的6条相似准则和3种碾压成层结构水弹模型的黏合模拟方式。基于频响函数原理,对5组模拟试件的冲击振动信号及频响函数进行分析,评估了不同模拟方式下试件的动力响应特性。结果表明:混凝土成层软弱结构采用由下至上分别为下层铣厚橡胶、硫化型橡胶黏合剂、低弹模薄层橡胶、硫化型橡胶黏合剂、上层铣厚橡胶的模拟方式,模拟结果符合理论规律。

Hydroelastic Simulation Mode of Weak Layered Structure of Roller Compacted Concrete Dams

This paper summarizes the features of the layered structure of the roller compacted concrete dam, which was needed for the fine simulation study of the flow-induced vibration of the roller compacted concrete dam. Besides, based on the hydroelastic model test, the simulation method of the layered weak structure of the roller compacted concrete dam is studied in depth, then six scaling criteria that the simulation of the hydroelastic model with rolled layered structure need to meet were presented, and three kinds of adhesion simulation methods of the layered structure are also put forward. Meanwhile, the vibration response signals and frequency response functions for five sets of simulated specimens are analyzed on account of the principle of frequency response function, and the dynamic response characteristics of specimens under different simulation methods are also evaluated. The simulation results show that the mode with materials of milling rubber, vulcanized rubber adhesive, thin low elastic modulus rubber, vulcanized rubber adhesive and milling rubber from the bottom to the top is in accordance with the theoretical laws.