Validation of Regulation Method of Uplift Load Modeling For Gravity Dams

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

Yaghobi Sarbisheh m.; AHMADI M.T.

Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Modares Civil Engineering journal Year:2018 | Volume:18 | Issue:6 Page(s): 221-231

Download Full-Text

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Verion

View:

413

Download:

Cites:

Information Journal Paper

Title

Validation of Regulation Method of Uplift Load Modeling For Gravity Dams

Author(s)

Yaghobi Sarbisheh m. | AHMADI M.T. | Issue Writer Certificate

Keywords

UpliftQ1

Gravity DamQ1

USACEQ3

Finite ElementQ2

Abstract

Gravity Dams are vital structures whose proper design and evaluation for stability are quite important. One of the effective forces on stability of concrete dams is the Uplift force and its distribution below the dam base. Uplift pressure resulting from headwater and tail-water not only exists through dam cross sections and the dam base, but also within the foundation below the dam base. In many Gravity Dams Uplift pressure is the major active force that must be included in the stability and stress analysis to ensure structural adequacy. There have been different methods employed since past to the present to assess and calculate the Uplift load. In each of these methods, depending on the degree of simplification, the accuracy of the answers will be reduced. Due to the limitations of each of these methods, available numerical methods may be used nowadays to estimate the values of pore pressure within the porous medium. As far as seepage forces have a great effect on stability of Gravity Dams, understanding the seepage in rock masses has a great importance, because the Gravity Dams are generally built on rock foundations. The actual influential phenomenon encountered in saturated jointed rock media is the joints hydro-mechanical interaction effect. Finite Element method as a general and systematic method is one of the most common numerical methods for solving engineering problems. Also, this method has significant application in hydraulic and hydrodynamic problems. In addition, the Uplift load pattern and distribution according to common codes are influenced by some factors such as head and tail water, assuming a segmented linear load distribution below the dam. In this research, to investigate the sensitivity of the load pattern to dam height, a number of Gravity Dams of Pine Flat type with different heights and their foundations are modeled. An enhanced modeling approach is employed to estimate the equivalent Uplift load distribution at the dam base for application in the standard Finite Element modeling procedures. Coupled p-u Finite Element analysis is performed accounting for the seepage and stress field simultaneously. Dam body is considered to be completely impervious. The foundation rock is assumed as homogeneous and uniform, in terms of elasticity and permeability. The stresses generated in the dam interface for each case of the coupled hydro-mechanical analysis is compared against that of the conventional load pattern according to the U. S. Army Corps of Engineers regulation for the same dam model. It was found that the error magnitude due to the conventional pattern has a direct relationship with the dam height. As the dam height increases, the amount of error of calculated stress increases. In particular, the error at the critical zones of the foundation such as at the dam heel, may raise even up to 40%. In the group of dams studied, the error increases even up to 12 times in respect to the expected error in the shorter dams. The deficiency could in some cases completely affect the safety of the dam. This research indicates the necessity of using more accurate methods of estimating Uplift load under high Gravity Dams.

Cites

No record.

References

No record.

Cite

APA: Copy

Yaghobi Sarbisheh, m., & AHMADI, M.T.. (2018). Validation of Regulation Method of Uplift Load Modeling For Gravity Dams. MODARES CIVIL ENGINEERING JOURNAL, 18(6 ), 221-231. SID. https://sid.ir/paper/256713/en

Vancouver: Copy

Yaghobi Sarbisheh m., AHMADI M.T.. Validation of Regulation Method of Uplift Load Modeling For Gravity Dams. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2018;18(6 ):221-231. Available from: https://sid.ir/paper/256713/en

IEEE: Copy

m. Yaghobi Sarbisheh, and M.T. AHMADI, “Validation of Regulation Method of Uplift Load Modeling For Gravity Dams,” MODARES CIVIL ENGINEERING JOURNAL, vol. 18, no. 6 , pp. 221–231, 2018, [Online]. Available: https://sid.ir/paper/256713/en

Related Journal Papers