A monitoring system and monitoring method for structural performance of a roller compacted concrete dam

Abstract

The invention discloses a monitoring system and method for the structural performance of a roller compacted concrete dam, which includes a structural performance monitoring device and a bending adjustment device. The structural performance monitoring device is connected to the bending adjustment device through a temperature sensing optical fiber. The temperature information obtained by sensing optical fiber, considering the difference in the thermal parameters of the RCC dam body and the layer, based on the equivalent analysis of thermal parameters such as the RCC linear expansion coefficient and specific heat, the finite element temperature strain increment calculation method is used for calculation and analysis At the same time, considering the linear strain and shear strain caused by the difference in thermal parameters between the layer and the body of the roller compacted concrete dam, and then analyzing and evaluating the structural behavior of the roller compacted concrete dam, based on the distributed monitoring of the temperature sensing optical fiber, The ability of monitoring is greatly improved, which satisfies the needs of actual structural performance diagnosis of roller compacted concrete dams, and provides an important guarantee for the current exploration of structural health monitoring of roller compacted concrete dams.

Description

technical field [0001] The invention relates to a monitoring system and method for the structural performance of a roller compacted concrete dam, belonging to the field of safety and health monitoring of hydraulic engineering structures. Background technique [0002] Since the first RCC dam was successfully built in my country in 1986, it is estimated that about 50 RCC dams have been built or are under construction, which is one of the promising dam types for the development of dam engineering in my country. RCC dams with a height of more than 100m that have been built recently, are under construction, and are about to start construction include Longtan (216m), Jiangya (131m), Baise (126m), Dachaoshan (121m), and Mianhuatan (111m). The amount of roller compacted concrete exceeds more than 60% of the entire dam concrete amount. [0003] my country's roller compacted concrete dam technology was developed on the basis of absorbing foreign advanced technology in the 1980s, but ...

AI Technical Summary

Problems solved by technology

[0004] In 1968, Wilson, a professor of the Department of Civil Engineering at the University of California, first developed a two-dimensional temperature field finite element simulation program DOT-DICE for the U.S. Army Corps of Engineers, which was successfully applied to the Dworshak Dam. In 1985, engineers Tatro and Schrader of the U.S. Army Corps of Engineers further modified the program and used it for the temperature field analysis of the first roller compacted concrete dam (RCCD) in the United States, Willow Creak. In 1992, Japan’s Tobishima Corporation published a back analysis method based on finite elements based on measured data to obtain thermal and boundary property parameters. For the current structural behavior of RCC dams, it is urgent to develop a method that can actually detect RCC dams. Although various numerical simulation technologies for the temperature field of concrete dams are advanced, they are simulations after all, and there are huge problems in their authenticity and referenceability.

Images