Engineering and Technology Journal

Modeling of Air-Water Filled Rubber Dam Under Hydrostatic Conditions

Qusay S. Khaleel; Thair S. Khayyun; Khudhayer N. Abdullah

Volume 39, Issue 12 , December 2021, , Page 1976-1987

https://doi.org/10.30684/etj.v39i12.1968

Abstract

Inflatable dams, also called rubber dams, are flexible cylindrical inflatable and deflatable structures attached to a rigid base; these dams are basically cylindrical tubes made of ... Read More ... Inflatable dams, also called rubber dams, are flexible cylindrical inflatable and deflatable structures attached to a rigid base; these dams are basically cylindrical tubes made of rubberized material and inflated by air, water, or a combination of the two. In this paper, the air/water inflatable dam was studied and analyzed numerically using ANSYS software. The 3-parameter Mooney-Rivlin Model was used to model the rubber material of the dam. At first, a physical model from literature was used to calibrate the results of the ANSYS software, and then a new model was analyzed with different dimensions and conditions. Thirty-six simulations were made using the ANSYS software to calibrate the software, based on experimental results from the literature. The simulations achieved a very low error rate compared to the experimental findings, with a maximum error rate of 1.45 percent. After that, a new air/water-filled dam model simulation was carried out. The new inflatable dam was analyzed with large dimensions that can be used to reserve water at high elevations. Several water heights (2, 4, 6, 8, and 10 m) were used as input at the upstream of the dam, and their effect on the dam body was verified on the assumption that there was no water downstream of the dam for all simulations. The height of the used inflatable dam was assumed to be 11 meters (first 5.5 m water pressure and the second 5.5m different air pressure values), and the bottom gaskets was 9.7 meters wide. It is evident from the analysis that the upstream water appears to push the dam to the right side (towards downstream), causing a change in dam equilibrium shape. The difference in the cross-sectional equilibrium profile of the dam is due to the change in air and water pressures on the element. Thus, it changes the tension and slope of the dam membrane elements. The simulation results showed that the membrane tension increases as the upstream head increases, and as the internal pressure increases, the tension increases. This rise in tension as the upstream head rises may be due to the rise in the forces on the element, and hence the membrane tension increases.

Effect of Tigris River's Stage on the Groundwater Level

Mustafa T. Al-Tahir; Thair S. Khayyun

Volume 39, Issue 7 , July 2021, , Page 1041-1051

https://doi.org/10.30684/etj.v39i7.442

Abstract

The research studies the effect of change of the Tigris River's surface stage on groundwater movement by building a three-dimension model using GMS model for a catchment ... Read More ...

Hydrological Model for Derbendi-Khan Dam Reservoir Watershed Using SWAT Model

Thair S. Khayyun; Imzahim Abdulkareem; Ali M. Hayder

Volume 38, 6A , June 2020, , Page 896-909

https://doi.org/10.30684/etj.v38i6A.890

Abstract

In this study, the watershed’s runoff of Derbendi-Khan dam reservoir within the upper part of Diyala River reach the northeast of Iraq was modeled by Soil Water Assessment Tool ... Read More ...

Stability Analysis of an Earth Dam Using GEO-SLOPE Model under Different Soil Conditions

Usama R. Mishal; Thair S. Khayyun

Volume 36, 5A , May 2018, , Page 523-532

https://doi.org/10.30684/etj.36.5A.8

Abstract

Numerical models are used to check the stability of earth dams and to simulate the effects of all the parameters, which affect its safety. The physical properties of the materials used ... Read More ...

Author = Khayyun, Thair S.

Modeling of Air-Water Filled Rubber Dam Under Hydrostatic Conditions

Abstract

Effect of Tigris River's Stage on the Groundwater Level

Abstract

Hydrological Model for Derbendi-Khan Dam Reservoir Watershed Using SWAT Model

Abstract

Stability Analysis of an Earth Dam Using GEO-SLOPE Model under Different Soil Conditions

Abstract