Engineering and Seismometric Service in the Buildings of Tashkent and Tashkent Regions

Rashidov, T. R.

doi:10.1007/978-94-010-0696-5_38

Cited by 4 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…) Considering the returning waves (in the calculations, n=1,2,3), the formula ( 14) for determining the internal explosion pressure can be written in the following form In particular, from (14) follows formula (12) proposed in [14,15] The description of the scene of propagation of shock waves in a limited space becomes more complicated when there is an explosion in a closed volume. In the relatively small dimensions of the structures, comparable to shock waves, the secondary waves returned from the adjacent wave wall are "laid down" (added) to the primary wave, which can lead to a serious increase in the load (Figure 3).…”

Section: Problem Statement and Resultsmentioning

confidence: 99%

Determination of loads of blast wave on aboveground and underground structures

et al. 2023

View full text Add to dashboard Cite

The article covers the problem of determination of loads of blast wave on aboveground and underground structures. In industrial production, the chemical sources of explosion occur, for which the environment is air. The most common and typical source of explosion is solid products of the explosion (PE) in the form of a packed charge. In a chemical explosion, highly compressed and heated gaseous products of the explosion (PE) are formed in the volume of the charge. The main parameters of the shock wave that determine its effect on the structure, i.e., excess pressure on the wave front, time of the wave's actionτ, and the impulse of the wave have been determined according to the empirical formulas obtained by experiment for each explosion source. Therefore, in this work, the formulas for determining the incident wave in large-scale experimental studies are presented. It has been found that loads on the structure of barriers of buildings are increase significantly as a result of secondary returning waves superimposing the first incident wave.

show abstract

Section: Problem Statement and Resultsmentioning

confidence: 99%

Determination of loads of blast wave on aboveground and underground structures

et al. 2023

View full text Add to dashboard Cite

show abstract

“…) of the centers of its end sections in the following form [22]: Representing forces and moments through generalized displacements of the pipeline ends and using the principle of possible displacements, we obtain a system of ordinary differential equations of motion for the buried pipeline element in vector form [9,22,26]:…”

Section: Distributed External Loadmentioning

confidence: 99%

“…is the damping matrix constructed by the Rayleigh's method (coefficients α and β are determined based on experimental data from the papers [9,22,26]); , , , , , , , , ,…”

Section: Distributed External Loadmentioning

confidence: 99%

“…The order of the element reaction matrix is 12 and the order of its submatrices is 6. The elements of this matrix are obtained from the system of equations ( 1) and boundary conditions (9). In the vector equation (11), the vector {U e } consists of elements representing the displacements and rotations of the ends of the finite element.…”

Section: Distributed External Loadmentioning

confidence: 99%

“…is the damping matrix constructed by the Rayleigh's method (coefficients α and β are determined based on experimental data from the papers [9,22,26]);   K is the stiffness matrix;   р С is the viscous interaction matrix;   р K is the elastic interaction matrix;   N K is the longitudinal force matrix;   U is the displacement vector;   0 U is the vector of a three-component seismic wave, specified in the form of a seismogram of a real earthquake record;  F is the load vector.…”

Section: Distributed External Loadmentioning

confidence: 99%

See 2 more Smart Citations

Study of the uplift of buried pipelines in liquefied soils based on the earthquake record

Mardonov,

Mirzaev,

Nishonov

et al. 2024

E3S Web Conf.

View full text Add to dashboard Cite

The uplift of a straight buried pipeline with a middle part located in liquefied soil was considered in the article. The process of uplift of the pipeline under the action of Archimedes’ force in the liquefied soil zone and longitudinal compressive force arising due to the temperature difference of the transported product and its internal pressure and also based on the Gazli earthquake record are investigated. To solve the problem the finite element method is used with the incremental refinement of the solution by the method of successive approximations. In the deformation process takes into account the separation of the pipeline from the base and the decrease of soil pressure along the length of the pipeline during the uplift process, taking into account the increment of displacement from the previous step. The results of solving the problem are presented in the form of graphs and their analysis for specific numerical parameters of the pipeline and its interaction with the surrounding soil.

show abstract

Studying the movement of fertilizers in the fertilizer spreader

Tukhtabayev

Turgunov

2023

E3S Web Conf.

View full text Add to dashboard Cite

The article presents the results of the study to substantiate the angle of the vertical installation of the fertilizer spreader, which localizes the fertilizer between the rows of cotton. Based on the results obtained, a working body is developed for mixing organic and mineral fertilizers during intercropping. The movement of the fertilizer pieces along the X and Y axes was studied. The coordinates of the fertilizer pieces’ landing point on the working surface of the fertilizer spreader, their velocities, and motion equations of the fertilizer pieces in the next jump were created. As a result, the cotton grows equally and yields a good harvest. The movement of the fertilizer pieces and the movement and distribution of the fertilizer spreader along the working surface are studied. It was found that the vertical mounting angle of the fertilizer could be ɛ = 18˚.

show abstract

Engineering and Seismometric Service in the Buildings of Tashkent and Tashkent Regions

Cited by 4 publications

References 0 publications

Determination of loads of blast wave on aboveground and underground structures

Determination of loads of blast wave on aboveground and underground structures

Study of the uplift of buried pipelines in liquefied soils based on the earthquake record

Studying the movement of fertilizers in the fertilizer spreader

Contact Info

Product

Resources

About