About the possibility for control of nature of seismic effect of bulky material on lateral surfaces

doi:10.21271/zjpas.31.s3.34

ZJPAS

2019

DOI: 10.21271/zjpas.31.s3.34

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About the possibility for control of nature of seismic effect of bulky material on lateral surfaces

Abstract: This study research investigated the seismic effects on the design of retaining walls. Analyzed regulatory guides for the calculation of these structures for the action of dynamic loads. Assessed the discrepancies between the calculated dependencies established by USA codes, Ukraine codes, and Eurocode. This work shows the relation between the curvature of the back face of the retaining wall and the lateral pressure diagram of the bulk material due to seismic load. Proposed the method for determining the ratio… Show more

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Cited by 2 publications

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Variable Method for Searching the Rational Design of Back Retaining Wall Surface

Khalife

Melish

2020

MEC

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The article presents the formulation and implementation of the variable task of finding a rational outline of the back face of a retaining wall. In the framework of the Coulomb theory, an analysis is made of a system consisting of a retaining structure and soil pressing on it for the possibility of formulating a rational design problem. The simplest example shows the possibility of formulating the problem of finding the rational geometry of the back face of a retaining wall within a given horizontal projection. The substantiation of the operation of the energy method of rationalization in solving the problem under consideration is given. The essence of the proposed method for finding the rational geometry of the back face of the retaining wall is to approximate the curved generatrix of the back face of the retaining wall with a broken line. For each broken section, key dependencies are derived for its effect on the nature of the stress-strain state of the structure, in particular, in the formulation under consideration, on the magnitude of the bending moment in pinching. Key dependencies are derived and an algorithm for solving the problem is described. An illustrative example shows that, given the characteristics of a loose granular moment, the moment of pinching can actually be described through a combination of the angles of inclination of each of the sections, and in general the form of such combinations is infinite. The problem is reduced to searching for such a combination αi, in which the introduced criterion (in the formulation under consideration, the moment in pinching) takes its lower value. The implementation of the approach is demonstrated by a numerical example. The proposed approach allows a variable method to determine the surface configuration of the retaining wall, rational from the standpoint of the accepted criterion. The example given in the work clearly proves the correctness of the statement of the problem and its solution. The operation of this method is advisable in the computing information environment. In particular, the practical application of the presented approach is possible by formulating and solving the linear programming problem by the simplex method. Keywords: Retaining wall, curvilinear surface, approximation, variational approach.

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Variable Method for Searching the Rational Design of Back Retaining Wall Surface

Khalife

Melish

2020

MEC

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Determination of the Probability of System Destruction "Loose Body - Construction" Against Shift

Rabih

2021

MEC

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The need for modern science-intensive models for assessing the reliability of building structures, and especially the system "loose body – structure" is now very acute due to the fact that such an assessment has become mandatory in the design. The existing gap is the lack of algorithms for determining the reliability of a complex system and is intended to fill this study. The aim of the article is to develop a method for determining the probability of failure of the system "bulk body – structure" against displacement using the method of statistical tests (Monte Carlo). To determine the probability of stability of the retaining wall against displacement, it is proposed to use the method of statistical tests using the accepted normative method of calculation. According to this method, it is necessary to perform N statistical tests, for each of which we will perform calculations according to the algorithm described in the article. A method for determining the probability of failure of the system "loose body – structure" against the shift by the statistical method of Monte Carlo. A test example was performed in the Mathcad environment. Calculations were performed to determine the probability of failure of the system "loose body – structure" against the shift by the statistical method of Monte Carlo. It was found that the value of the probability of failure of the system "loose body – structure" against the shift over the base service life may be in the range of 1x10-5… 1x10-3. It would also be interesting to use probabilistic methods to develop algorithms for the probability of failure of retaining walls due to loss of bearing capacity of the soil base, strength of the rock base, loss of strength of structural elements and joints, as well as the probability of exceeding the deformation of the base.

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About the possibility for control of nature of seismic effect of bulky material on lateral surfaces

Cited by 2 publications

References 7 publications

Variable Method for Searching the Rational Design of Back Retaining Wall Surface

Variable Method for Searching the Rational Design of Back Retaining Wall Surface

Determination of the Probability of System Destruction "Loose Body - Construction" Against Shift

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