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A PRIMARY DIGITAL DAM SIMULATION SYSTEM FOR AN ARCH DAM

机译:拱坝的原始数字坝仿真系统

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Dam safety monitoring is one of the most indispensable tasks 'in dam construction and management which can provide plenty of raw monitoring data. Much actual performance information of dams, such as temperature, deformation, stress/strain and opening of cracks and joints, can be obtained by monitoring data. It is believed that the comprehensive state-of-art finite element analyses can also simulate the actual performance of dams if the input information is precise enough. Such Finite Element Model can be called "Digital Dam Simulation System (DOS System)". In this paper, based on abundance monitor data of an Arch Dam, a pilot primary model of DDS System is presented. Based on the monitoring data of the three plumb lines at the dam body, a simplified inverse analysis for the mechanical parameters of dam and foundation is performed. The precision and validation of FE model is verified. Then, a three-year simulation analysis of deformation process of the Arch Dam under the actual loads of gravity, hydrostatic pressure and temperature is conducted. The simulation deformation of the dam accord with the monitoring data approximately. Especially, the area of high stresses and the direction of maximal principal stresses on the downstream surface are almost identical with that of existing concrete cracks. The advancement of this study demonstrates that DDS systems can be developed for concrete dams with integrated monitoring systems in the future.
机译:大坝安全监测是大坝建设和管理中必不可少的任务之一,可以提供大量原始监测数据。大坝的许多实际性能信息,例如温度,变形,应力/应变以及裂缝和接缝的开度,都可以通过监测数据获得。可以相信,如果输入信息足够精确,那么综合的最新有限元分析也可以模拟大坝的实际性能。这种有限元模型可以称为“数字大坝模拟系统(DOS系统)”。本文基于拱坝的丰度监测数据,提出了DDS系统的试验性初级模型。根据坝体三根铅垂线的监测数据,对坝体和地基的力学参数进行了简化的反分析。验证了有限元模型的精度和有效性。然后,对拱坝在实际重力,静水压力和温度作用下的变形过程进行了为期三年的仿真分析。大坝的模拟变形与监测数据基本吻合。特别是,下游表面上的高应力区域和最大主应力的方向与现有混凝土裂缝几乎相同。这项研究的进展表明,将来可以为具有集成监控系统的混凝土大坝开发DDS系统。

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