Design, construction, and reliable and safe operation of earth dams (more than 60 of them are in operation in the Republic of Uzbekistan located in seismic region) put forward requirements for the continuous improvement of the calculation methods for loads; as required by regulatory methods for fundamental (static) and special (dynamic) load combinations. These regulatory methods do not take into account the nonhomogeneous nature of the behavior and piecewise heterogeneity of the characteristics of foundation, and the stress-strain state (SSS) of an earth dam under constant or temporary loads, which is necessary for reliable and safe operation, especially in seismic regions. A general mathematical formulation of problems for earth dams in a plane elastic formulation is given. Dynamic calculations were conducted to determine the stress-strain state of an earth dam, taking into account the design features and real piecewise-nonhomogeneous physical and mechanical characteristics of soil of the structure body and base (these characteristics were provided by the design organization). The problem was solved by the numerical finite element method. The eigenfrequencies and modes of vibrations of the plane "structure-foundation" system are determined, considering the homogeneous and piecewise-nonhomogeneous characteristics of the foundation soil; the corresponding analysis of the behavior of the system was made. The stress-strain state of the “dam-foundation” system was investigated using calculated frequencies. The calculation results were lines of equal displacements (horizontal, vertical), normal and shear stresses in the “dam-foundation” system.
1. ShNK 2.06.11-04 Construction in seismic areas. Hydro-technical structures. Tashkent. Gossarkhitekstroy. 2004. 50 p. (rus.)
2. KMK Dams from earth materials. Tashkent. Gosarkhitekstroy. 2004. 50 p. (rus.)
3. Akhmedov M.A., Salyamova K.D. Analysis and assessment of damage to hydro-technical structures. Fan va technologia. Tashkent. 2016. 160 p. (rus.)
4. Stephanishin D.V. Predicting the accident rate of designed and constructed dams based on the results of statistical analysis of accidents. Izvestiya VNIIG named after B.E. Vedeneev. 2008. 251. P. 3 – 9. (rus.)
5. Khamidov L.A., Ibragimov A.Kh., Alimukhamedov I.M., Khamidov H.L. Results of processing records of vibrations of dams and coastal slopes of the Charvak and Andijan reservoirs of Uzbekistan during small earthquakes. Russian Seismological Journal. 2020. 2 (4). P. 28 – 42. DOI: https://doi.org/10.35540/2686-7907.2020.4.03 (rus.)
6. Khamidov L.A., Ibragimov A.Kh., Khamidov Kh.A., Artikov F.R., Ganieva B.R., Anvarova S.R. Development of the project and creation of local networks for monitoring seismic hazard in large reservoirs located in zones of 8-9 point seismicity in Uzbekistan. Problems of seismology. 2020. 2 (3). P.74 – 80. (rus.)
7. Salyamova K.D., Rumi D.F., Turdikulov Kh.X. Analysis of seismic stability of retaining earth structures with account of dissipative properties of soil. European Sciences review. 2018. P. 81 – 84.
8. Salyamova K.D., Turdikulov Kh.X. Numerical Analysis of the Stress State of Earth Dam under Dynamic Loads. International Journal of Advanced Research in Science. Engineering and Technology. 2019. 6 (8). Р. 10564 – 10569.
9. Salyamova K.D., Turdikulov Kh.Kh. Static stress state of a high earth dam taking into account field observations. Journal of Problems of Mechanics. 2019. 2. P. 58 – 62. (rus.)
10. Yangiev A., Salyamova K., Turdikulov K., Fayziev K. Dynamics of an earth dam with account for rheological properties of soil under dynamic effect. IOP Conf. Series: Materials Science and Engineering. 2020. 869. 072005. doi:10.1088/1757-899X/869/7/072005
11. Salyamova K.D., Tyrdikulov X.X., Yangiev A.A., Kh. Fayziev Dynamic Behavior of Earth Dam under Nonstationary Kinematic Effect. International Journal of Recent Technology and Engineering. 2020. 8 (5). Р. 101 – 108.
13. Rasskazov L.N., Yadgorov E.Kh. Settlements and displacements of the Nurek dam according to field observations. Hydro-technical engineering. 2017. 2. P. 18 – 24. (rus.)
14. Rasskazov L.N., Yadgorov E.Kh. Nikolaev V.B. Field observations of soil settlements, displacements and pore pressure in dams. Hydrotechnical construction. 2017. 9. P. 29 – 39. (rus.)
15. Mirsaidov M.M., Sultanov T.Z., Rumi D.F. An assessment of dynamic behavior of the system «structure-foundation» with account of wave removal of energy. Magazine of Civil Engineering. 2013. 39 (4). P. 94 – 105.
16. Mirsaidov M.M., Sultanov T.Z., Abdikarimov R.A., Ishmatov A.N., Yuldoshev B.Sh., Toshmatov E.S., Juraev D.P. Strength parameters of earth dams under various dynamic effects. Magazine of Civil Engineering. 2018. 6 (82). P. 112 – 126.
17. Gadai D.V., Bestuzheva A.S. The search for the methods of factor analysis for an optimal design of earth-fill dams with stone-concrete support zone. Power Technology and Engineering. 2017. 51 (4). P. 385 – 389. (rus.)
18. Gadai D.V., Bestuzheva A.S. Search for the optimal composition and research of special material for the sub-screen zone of a dam with a reinforced concrete screen. Hydro-technical engineering. 2018. 10. P. 40 – 48. (rus.)
19. Zenkevich O. The finite element method in technology. M. Mir. 1975. 541 p. (rus.)
20. Sagdiev T.G., Kutsenko K.V. Assessment of the intensity of impacts on earth dams. Proceedings of the Institute "VODGEO". M., 1981. P. 53 – 64.
21. Salyamova K.D. Dynamic stress-strain state of earth dam considering an inhomogeneous base. IOP Conf. Series Materials Science and Engineering. 2020. 945. 012033. doi 10.1088/1757/899X/945/1/012033
Salyamova K.D. Dynamic calculation of the plane elastic "dam-foundation" system. Construction Materials and Products. 2021. 4 (5). P. 16 – 23. https://doi.org/10.34031/2618-7183-2021-4-5-16-23